1) Out of the following which one is not a Non-conventional source of energy ?

​

1. Tidal power

​

• Geothermal energy

​

• Nuclear energy

​

• Wind power.

​

Ans : (c)

​

1. Pulverized coal is

​

1. coal free from ash

​

• non-smoking coal

​

• coal which bums For long time

​

• coal broken into fine particles.

​

Ans: (D)

​

2. Heating value of coal is approximately

(A) 1000-2000 kcal / kg (B) 2000-4000 kcal / kg (C) 5000-6500 kcal / kg

(D) 9000-10,500 kcal / kg.

​

Ans: (C)

3. Which of the following is considered as superior quality of coal ?

​

1. Bituminous coal

​

• Peat

​

• Lignite

​

• Coke.

​

Ans: (A)

​

4. Coal used in Thermal power plant is also known as

​

1. steam coal

​

• charcoal

​

• coke

​

• soft coal.

​

Ans: (A)

​

5. In a power plant, coal is carried from storage place to boilers generally by means of

​

1. bucket

​

• V-belts

​

• trolleys

​

• manually.

​

Ans: (B)

6. Pressure of steam in condenser is

​

1. atmospheric pressure

​

• more than pressure

​

• slightly less than pressure

​

• much less than pressure.

​

Ans : (D)

7. The efficiency of a thermal power plant improves with

​

1. increased quantity of coal burnt

​

• larger quantity of water used

​

• lower load in the plant

​

• use of high steam pressures.

​

Ans: (D)

​

8. Power plants using coal work closely on known which of the following cycle ?

​

1. Otto cycle

​

• Binary vapor cycle

​

• Brayton cycle

​

• Rankine cycle.

​

Ans: (D)

​

9. Steam pressures usually used in thermal power plants are

​

1. 5 kg/cm² to 10 kg / cm²
2. 50 kg/cm² to 100 kg / cm²
3. 110 kg/cm² to 170 kg / cm²
4. 200 kg/cm² to 215 kg / cm²

​

Ans: (C)

​

10. The following is the correct order of energy conversion in thermal power plants

​

1. Thermal energy – Mechanical energy – Electrical energy

​

• Mechanical energy – Chemical energy – Electrical energy

​

• Wind energy – Mechanical energy – Electrical energy

​

• Heat energy – Electrical energy – Mechanical energy

​

Ans: (A)

11. In thermal power plant, turbine is placed

​

1. before boiler

​

• in between boiler and generator

​

• after generator

​

• any of the above

​

Ans: (B)

​

12. In the steam condensing power plants

​

1. The amount of energy extracted per kg of steam is increased

​

• the steam, converted into water, can be re-circulated with the help of pump

​

• Both (A) and (B)

​

• None of the above

​

Ans : (C)

​

13. In thermal power plants, the dust of flue gases is trapped by

​

1. Precipitator

​

• Economizer

​

• Superheater

​

• Air preheater

​

Ans: (A)

​

14. The path of flue gases in Thermal power plant is

​

1. Boiler – Economizer – Superheater– Air preheater

​

• Boiler – Superheater – Air preheater – Economizer

​

• Boiler – Air preheater – Superheater – Economizer

​

• Boiler – Superheater – Economizer – Air preheater

​

Ans: (D)

15. The following is not a component of Thermal power plant

​

1. Condenser

​

• Cooling tower

​

• Turbine

​

• Fuel tank

​

Ans: (D)

16. With the increase in

the efficiency obeys the ‘law of diminishing returns’.

1. Pressure

​

• Temperature

​

• Volume

​

• All of the above

​

Ans: (A)

​

17. The thermal efficiency of a steam power station is.......

​

(A) 38%

​

(B) 28%

​

(C) 40%

​

(D) 45%

​

Ans : (B)

18. In thermal power plant,............ is used to heat the boiler fed water before it is admitted into boiler drum.
1. Superheater
2. Condenser
3. Economizer
4. Air preheater

Ans: (C)

19. The modern steam turbines are

​

1. impulse turbines
2. reaction turbines
3. impulse-reaction turbines
4. none of the above

​

Ans: (c)

​

20. The draught which a chimney produces is called

​

1. induced draught
2. natural draught
3. forced draught
4. balanced draught

​

Ans: (B)

​

21. The draught produced by steel chimney as compared to that produced by brick chimney for the same height is

1. less
2. more
3. same
4. may be more or less.

​

Ans: (B)

​

22. In a boiler installation the natural draught is produced

​

1. due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
2. due to the fact that pressure at the grate due to cold column is higher than the pressure at

the chimney base due to hot column

3. due to the fact that at the chimney top the pressure is more than its environmental pressure
4. all of the above

Ans: (B)

​

23. The draught produced, for a given height of the chimney and given mean temperature of chimney gases

​

1. decreases with increase in outside air temperature
2. increases with increase in outside air temperature
3. remains the same irrespective of outside air temperature
4. may increase or decrease with increase in outside air temperature

​

Ans: (A)

24. The draught in locomotive boilers is produced by

​

1. forced fan
2. chimney
3. steam jet
4. only motion of locomotive

​

Ans: (C)

Ans: (D)

​

27. The major heat loss in a steam power station occurs in ........

​

• Heat chamber
• Penstock
• Spillways
• Condenser

Ans: (D)

​

28. The cost of fuel transportation is maximum in........

​

• Hydro-electric power plant
• Steam power plant
• Nuclear power plant (D) 90% - 95%

Ans: (B)

29. Which is the second stroke in four stroke diesel engine .
1. Compression
2. power
3. Suction
4. Exhaust

Ans: (A)

​

30. In jet type condensers

1. cooling water passes through tubes and steam surrounds them
2. steam passes through tubes and cooling water surrounds them
3. steam and cooling water mix
4. steam and cooling water do not mix

​

Ans: (C)

31. Which of the following is not a requirement for site selection of hydroelectric power plant?

1. Availability of water
2. Large catchment area
3. Rocky land
4. Sedimentation

Ans: (D)

32. The amount of electrical energy that can be generated by a hydroelectric power plant depends upon

1. Head of water
2. Quantity of water
3. Specific weight of water
4. Efficiency of Alternator

Ans: (B)

33. Potential energy of water is used to drive the turbine.

1. True
2. False

Ans: (B)

Q.34. Water tube boilers are those in which.............

1. Hot gases are passed in the tubes and water surrounds this tube.
2. Water passes through the tubes and flue gases around it
3. Work is done during adiabatic expansion
4. None of the above

Ans: (B)

​

35. Hydroelectric power plant is mainly located in

1. Flat areas
2. Deserts
3. Hilly areas
4. Deltas

Ans: (C)

36. Which statement about hydroelectric power plant is wrong?

1. Efficiency of hydroelectric power plant does not reduce with age
2. Its construction cost is very high and takes a long time for erection.
3. It is very neat and clean plant because no smoke or ash is produced.
4. Meeting rapidly changing load demands is not possible in hydroelectric power plant.

Ans: (D)

37. Which of the following is not an advantage of hydroelectric power plant?

1. no fuel requirement
2. low running cost
3. continuous power source
4. no standby losses

Ans: (C)

38. Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?

1. Valves and Gates
2. Draft tubes
3. Spillway
4. Surge Tank

Ans: (D)

39. Dam having very wide base as compared to its height is called

1. buttress dam
2. arch dam
3. earth dam
4. solid gravity dam Ans: (C)

40. Spillway discharges the overflow water to the downstream side when the reservoir is full.

1. True
2. False

Ans: (A)

41. Trash racks are used for

1. discharging the water freely from the turbine exit to tailrace
2. it is used to filter the water before it flows towards turbine.
3. creating artificial head to store sufficient potential energy of water
4. controlling the opening of valves

Ans: (B)

42.The function of Penstock in a hydroelectric power plant is

1. a pipe connected to runner outlet
2. nozzle that release high pressure water on turbine blades
3. It is used to carries the water with high velocity from dam towards turbine.
4. a pipe connecting surge tank to dam

Ans: (C)

43. The pressure at the inlet or exit of the draft tube should not be

1. less than one third of atmospheric pressure
2. greater than one third of atmospheric pressure
3. less than one atmospheric pressure
4. greater than one atmospheric pressure

Ans: (A)

44. Draft tube increases the operating head on the turbine.

1. True
2. False

Ans: (A)

Q.45. The following is the correct order of energy conversion in Hydro power plants.

1. Thermal energy – Mechanical energy – Electrical energy
2. Mechanical energy – Chemical energy – Electrical energy
3. Potential energy – Kinetic energy – mechanical energy– Electrical energy
4. Heat energy – Electrical energy – Mechanical energy

Ans: (C)

​

46. Draft tube are located

1. near tailrace
2. at the Valve side
3. inside penstock
4. at intake

Ans: (A)

47.Kaplan turbine is

1. axial flow turbine
2. inward flow turbine
3. tangential flow turbine
4. mixed flow turbine

Ans: (A)

48. Pelton turbines are used for

1. medium head applications
2. low head applications
3. in steam power plants
4. for high head applications

Ans: (D)

49. Francis turbines are used in

1. medium head plants
2. low head plants
3. in steam power plants
4. high head plants

Ans: (A)

50. Operating head of Francis turbine is

1. less than 30
2. less than 70 m
3. 30 to 300 m
4. more than 200 m

Ans: (C)

51. Which of the following is not a reaction turbine?

1. Francis turbine
2. Kaplan turbine
3. Pelton wheel turbine
4. Propeller turbine

Ans: (C)

52. Inside pressure of which of the following turbine is equal to atmospheric pressure?

1. Fixed vane propeller turbine
2. Movable vane propeller turbine
3. Francis turbine
4. Pelton wheel turbine

Ans: (D)

53. Francis turbine is suitable for medium head hydroelectric power plant.

1. True
2. False

Ans: (A)

54. Which turbine has highest speed?

1. Pelton wheel turbine
2. Francis turbine
3. Impulse turbine
4. Kaplan turbine

Ans: (D)

55. Governing mechanism used in case of Pelton wheel turbine is

1. guide vane
2. nozzle needle
3. control valve
4. dam gates

Ans: (B)

56. Guide vanes are used as governor in Kaplan turbine.

1. True
2. False

Ans: (A)

57. The cheapest plant in operation and maintenance is.......

​

• Steam power plant
• Nuclear power plant
• Hydro-electric power plant
• None of the above

Ans: (C)

58. The most simple and keen plant is.......
1. Nuclear power plant
2. Steam power plant
3. Hydro-electric power plant
4. None of the above

Ans: (C)

59. Pelton turbines are mostly........

​

• Horizontal
• Vertical
• Inclined
• None of the above

Ans: (A)

​

60. The power output from a hydro-electric power plant depends on three parameters........
2. Head, type and dam of discharge
3. Head, discharge and efficiency of the system
4. Efficiency of the system, type of draft tube and type of turbine used
5. Type of dam, discharge and type of catchment area

Ans: (B)

​

61. Pelton wheel turbine is used for minimum of the following heads........

A.40 m

B.120 m

C.150 m

D.180 m or above

Ans: (D)

62. In high head hydro power plant the velocity of water in penstock is about........

A.1 m/s

B.4 m/s

C.7 m/s

D.12 m/s

Ans: (C)

63. Running cost of a hydro-electric power plant is.......

Equal to running cost of a steam power plant Less than running cost of a steam power plant More than running cost of a steam power plant None of the above

Ans: (B)

​

64. High head power plants are located at the height of
1. less than 30
2. less than 70 m
3. 30 to 300 m
4. more than 300 m

Ans: (D)

65.The best capable alternative source which can meet the future energy demand is

.

1. thermal power plant
2. nuclear power plant
3. hydroelectric power plant
4. geothermal power plant

Ans: (B)

66. How much coal is required to generate energy equivalent to the energy generated by 1 kg of uranium?

1. 30000 tonnes of high grade coal
2. 300 tonnes of high grade coal
3. 10000 tonnes of high grade coal
4. 3000 tonnes of high grade coal

Ans: (D)

67.Nuclear fuel in reactor lasts for

1. more than 5 months
2. few weeks
3. few days
4. more than 5 years

Ans: (D)

68.Cost of nuclear fuel in nuclear power plant economics is considered as

1. running cost
2. maintenance cost
3. capital cost
4. development cost

Ans: (C)

69. In economics of nuclear power plant taxes and insurance charges are taken as

​

1. operating cost
2. maintenance cost
3. capital cost
4. fixed cost

Ans: (D)

​

​

70. Control rods are made up from .............. material.

1. Cadmium
2. Graphite
3. beryllium
4. thorium

Ans: (A)

71. The land area required for installation of nuclear power plant is

1. more than thermal power plant
2. less than thermal power plant
3. equal to thermal power plant
4. depends on type of construction

Ans: (C)

​

72. All of the nuclear fuel reserve will be ended in about 400 years.

1. True
2. False

Ans: (B)

73.With respect to the load center which location is suitable for establishment of nuclear power plant?

1. Load center
2. Near load center but at reasonable distance
3. Far away from load center
4. Near chemical industries

Ans: (B)

74.Diesel power plant is used as.....

1. Peak load plant.
2. Emergency power plant
3. Both (A) and (B)
4. None of the above

Ans: (C)

​

75. In nuclear power stations which nuclear reaction is performed?

1. Nuclear fission
2. Nuclear fusion
3. 90% fission and 10% fusion
4. 90% fusion and 10% fission

Ans: (A)

76. Which particle is bombarded on heavy nucleus of nuclear fuel?

1. Electron
2. Proton
3. Neutron
4. Photon

Ans: (C)

77. The critical mass for U235 fission reaction is about

1. 100Kg
2. 200 Kg

C) 50 kg

d) 10 kg

Ans: (D)

78.What is the main function of moderator?

1. It absorb the extra neutrons
2. It divert extra neutrons
3. It reduces the speed of fast neutrons
4. It absorb the heat energy caused by nuclear reaction

Ans: (C)

​

79. Which fissionable nuclear fuel occur in nature?

1. Plutonium
2. Thorium
3. Uranium

d) 94239 Pu

Ans: (C)

80. The first nuclear power plant in India is located at

1. Kota
2. Kalapakkam
3. Tarapur
4. Bareilly

​

Ans: (C)

1. Out of the following which one is not a unconventional source of energy ?

1. Tidal power
2. Geothermal energy
3. Nuclear energy
4. Wind power.

​

​

Get Answer

C

2. Pulverized coal is

1. coal free from ash
2. non-smoking coal
3. coal which bums For long time
4. coal broken into fine particles.

​

​

Get Answer

D

3. Heating value of coal is approximately

(A) 1000-2000 kcal / kg (B) 2000-4000 kcal / kg (C) 5000-6500 kcal / kg (D) 9000-10,500 kcal / kg.

​

​

Get Answer

C

4. Water gas is a mixture of

1. ^CO2 ^{and O}2
2. ^O2^{and H}2
3. ^H2^{, N}2 ^{and O}2
4. ^{CO, N}2 ^{and H}2^.

​

Get Answer

D

5. Coal used in power plant is also known as

1. steam coal
2. charcoal
3. coke
4. soft coal.

​

​

Get Answer

A

6. Which of the following is considered as superior quality of coal ?

1. Bituminous coal
2. Peat
3. Lignite
4. Coke.

​

​

Get Answer

A

7. In a power plant, coal is carried from storage place to boilers generally by means of

1. bucket
2. V-belts
3. trolleys
4. manually.

​

​

Get Answer

B

8. Live storage of coal in a power plant means

1. coal ready for combustion
2. preheated coal
3. storage of coal sufficient to meet 24 hour demand of the plant
4. coal in transit.

​

​

Get Answer

C

9. Pressure of steam in condenser is

1. atmospheric pressure
2. more than pressure
3. slightly less than pressure
4. much less than pressure.

​

​

Get Answer

D

10. Equipment used for pulverizing the coal is known as

1. Ball mill
2. Hopper
3. Burner
4. Stoker.

Get Answer

A

11. Power plants using coal work closely on known which of the following cycle ?

1. Otto cycle
2. Binary vapor cycle
3. Brayton cycle
4. Rankine cycle.

​

​

Get Answer

D

12. Critical pressure of water is

1. 1 kg / cm²
2. 100 kg / cm²
3. 155 kg / cm² (D) 213.8 kg / cm².

​

​

Get Answer

D

13. The efficiency of a thermal power plant improves with

1. increased quantity of coal burnt
2. larger quantity of water used
3. lower load in the plant
4. use of high steam pressures.

​

​

Get Answer

D

14. Which of the following contributes to the improvement of efficiency of Rankine cycle

in a thermal power plant ?

1. Reheating of steam at intermediate stage
2. Regeneration use of steam for heating boiler feed water
3. Use of high pressures

(D) All of the above.

​

​

Get Answer

D

15. Steam pressures usually used in thermal power plants are

1. 5 kg/cm² to 10 kg / cm²
2. 50 kg/cm² to 100 kg / cm²
3. 110 kg/cm² to 170 kg / cm²
4. 200 kg/cm² to 215 kg / cm²

​

​

Get Answer

C

16. When pulverized fuel is not used, the equipment used for supplying coal to the boiler

is

1. Heater
2. Stoker
3. Burner
4. Skip hoist.

​

​

Get Answer

B

17. Burning of low grade fuel can be improved by

1. Blending with better quality
2. Oil assisted ignition
3. Pulverizing
4. Any of the above.

​

​

Get Answer

D

18. As steam expands in turbine

1. its pressure increases
2. its specific volume increases

3. its boiling point increases
4. its temperature increases.

​

​

Get Answer

B

19. Water is supplied to a boiler

1. at atmospheric pressure
2. at slightly more than atmospheric pressure
3. at 100 cm/kg²
4. at more than the steam pressure on the boiler.

​

​

Get Answer

D

20. Which of the following enters the super heater of a boiler ?

1. Cold water
2. Hot water
3. Wet steam
4. Super-heated steam.

​

​

Get Answer

C

21. Super heated steam is always

1. at a temperature higher than the saturation temperature corresponding to a steam pressure
2. at a pressure more than the boiler steam pressure
3. separated from water particles before being supplied to turbine (D) at a pressure less than the maximum cycle pressure.

​

Get Answer

A

22. The equipment installed in power plants to reduce air pollution due to smoke is

(A) Induced draft fans (B) De-super heaters

(C) Electrostatic precipitators (D) Re-heaters.

​

​

Get Answer

C

23. Permissible pH value of water for boilers is (A) 1

2. 7
3. slightly more than 7 (D) 10.

​

​

Get Answer

C

24. A condenser in a thermal power plant condenses steam combing out of (A) Boiler

(B) Super-heater (C) Economizer (D) Turbine.

​

​

Get Answer

D

25. Which of the following, is not a high pressure boiler ? (A) Loeffler boiler

(B) Lancashire boiler (C) Velox boiler

(D) Lamont boiler.

​

​

Get Answer

B

26. What is the maximum size of steam turbine usually being installed, for thermal power plants ?

1. 120 MW
2. 250 MW
3. 500 MW

(D) 1000 MW.

​

​

Get Answer

C

27. Overall thermal efficiency of a steam power station is in the range (A) 18-24%

(B) 30-40%

(C) 44-62%

(D) 68-79%.

​

​

Get Answer

A

28. Which of the following is not the voltage at which power is usually transmitted (A)132 kV

2. 66 kV
3. 33 kV
4. 20 kV.

​

​

Get Answer

D

29. Most of the generators in thermal power plants run at (A) 3000 rpm

(B)1500 rpm (C) 1000 rpm

(D) 750 rpm.

​

​

Get Answer

30. In regenerative cycle, bled steam is (A) discharged to atmosphere

A

(B) condensed in steam condenser (C) used to beat feed water for boiler

(D) is mixed with steam supplied to turbine.

​

​

Get Answer

C

31. Standard frequency usually for electric supply is

1. 50 Hz
2. 60 Hz
3. 50 to 60 Hz
4. 50 to 55 Hz.

​

​

Get Answer

A

32. In power station practice "spinning reserve" is

1. reserve generating capacity that is in operation but not in service
2. reserve generating capacity that is connected to bus and ready to take the load (C) reserve generating capacity that is available for service but not in operation (D) capacity of the part of the plant that remains under maintenance.

​

​

Get Answer

B

33. Bagasse is (A) low quality coal

2. a fuel consisting of wood
3. fibrous portion of sugarcane left after extracting the juice (D) a kind of rice straw.

34. Low grade fuels have (A) low moisture content

Get Answer

C

(B) low ash content (C) low calorific value (D) low carbon content.

​

​

Get Answer

C

35. Which variety of coal has lowest calorific value? (A) Steam-coal

(B) Bituminous coal (C) Lignite

(D) Anthracite.

​

​

Get Answer

C

36. In a steam locomotive the engine is (A) Single cylinder

2. Vertical
3. Condensing
4. Non-condensing.

​

​

Get Answer

D

37. The boilers using lignite as fuel do not use (A) under feed stoker

(B) traveling grate stoker (C) spreader stoker

(D) all of the above.

38. In a steam turbine cycle, the lowest pressure occurs in (A) turbine inlet

Get Answer

A

2. boiler
3. condenser (D) super heater.

​

​

Get Answer

C

39. Steam pressure in modem thermal plants of 100 MW and above capacity may be exacted to be

1. 10 kg/cm²
2. 50 kg/cm²

(A) up to 100kg/cm²

(D) more than 100 kg/cm².

​

​

Get Answer

D

40. The overall efficiency of a boiler in a thermal power plant is of the order of (A)10%

(B) 25 to 30% (C) 40 to 50% (D) 70 to 80%.

​

Get Answer

D

41. Chemical composition of coal is given by (A) Proximate analysis

(B) Ultimate analysis

(C) Orast analysis (D) All of the above.

​

​

Get Answer

B

42. Which coal will have highest ash content ? (A) Bituminous coal

(B) Grade I steam coal (C) Coking coal

(D) Lignite.

​

​

Get Answer

D

43. Ash content of most of the Indian coals is around (A) 1%

(B) 5%

(C) 10%

(D) 20%.

​

​

Get Answer

D

44. Ash content of coal can be reduced by (A) slow burning

(B) washing (C) pulverizing

(D) mixing with high grade coal.

​

​

Get Answer

B

45. A 100 MW thermal power-plant will consume nearly how many tonnes of coal in one

hour ?

1. 50 tonnes
2. 150 tonnes
3. 1500 tonnes
4. 15,000 tonnes.

​

​

Get Answer

A

1. 1-2 kgs
2. 2-4 kgs
3. 5-7 kgs

(D) 10-12 kgs.

​

​

Get Answer

C

47. For low head and high discharge, the hydraulic turbine used is

1. Kaplan turbine
2. Francis turbine
3. Pelton wheel
4. Jonual turbine.

​

​

Get Answer

A

48. Soot is virtually nothing but

1. ash
2. cinder
3. gas
4. carbon

​

​

Get Answer

D

49. In pumped storage

(A) Power is produced by means of pumps

2. Water is stored by pumping to high pressures
3. Downstream water is pumped up-stream during off load periods
4. Water is re circulated through turbine.

​

​

Get Answer

C

50. If the air standard efficiency of. a thermodynamic cycle is given as

η= 1 - ( k ( r-1 ) ) / ( r^k-1 )

where r = compression ratio, k = C_p/ C_v

​

the cycle is

1. Lenoir cycle
2. Brayton cycle
3. Atkinson cycle
4. None of the above.

​

​

Get Answer

A

51. A graphical representation between discharge and time is known as

1. Monograph
2. Hectograph
3. Topograph
4. Hydrograph.

​

​

Get Answer

D

52. Cost of operation of which plant is least ?

1. Gas turbine plant
2. Thermal power plant
3. Nuclear power plant

(D) Hydroelectric plant.

​

​

Get Answer

D

53. In a hydro-electric plant a conduct system for taking water from the intake works to

the turbine is known as

1. Dam
2. Reservoir
3. Penstock
4. Surge tank.

​

​

Get Answer

C

54. A Pelton wheel is

1. inward flow impulse turbine
2. Outward flow impulse turbine
3. Inward flow reaction turbine
4. Axial flow impulse turbine.

​

​

Get Answer

D

55. Running away speed of a Pelton wheel is

1. Actual operating speed on no load
2. Full load speed
3. No load speed when governor mechanism fails
4. 90% greater than the normal speed.

​

​

Get Answer

C

56. Spouting velocity is

(A) Ideal velocity of jet

2. 50% of ideal velocity of jet
3. Actual velocity of jet
4. Velocity of jet under specified conditions.

​

​

Get Answer

A

57. Outward radial flow turbines

1. are impulses turbines
2. are reaction turbines
3. are partly impulse partly reaction turbines
4. may be impulse or reaction turbines.

​

​

Get Answer

D

58. A Francis turbine is

1. Inward flow reaction turbine
2. Inward flow impulse turbine
3. Outward flow reaction turbine
4. Outward flow impulse turbine.

​

​

Get Answer

A

59. A Kaplan turbine is

1. a high head mixed flow turbine
2. an impulse turbine, inward flow type
3. an reaction turbine, outward flow type
4. low head axial flow turbine.

​

​

Get Answer

D

60. In turbulent flow

1. the fluid particles move in orderly manner
2. momentum transfer is on molecular scale only
3. shear stresses are generally larger than in laminar flow
4. cohesion is more effective than momentum transfer in causing shear stress.

​

​

Get Answer

C

61. An impulse turbine

1. always operates submerged
2. makes use of a draft tube
3. is most suited for low head installations
4. operates by initial complete conversion to kinetic energy.

​

​

Get Answer

D

62. In an impulse turbine

1. water must be admitted over the whole circumference of the wheel
2. it is net possible to regulate the flow without loss
3. wheel must run full and be-kept entirely submerged in water below the tail race (D) the pressure in the driving fluid as it moves over the vane, is atmospheric.

​

Get Answer

​

63. In binary vapor cycle

(A) steam at 2 different pressures is used (B) steam is expanded in 2 turbines

3. two fluids are used
4. vapor and liquid are used as working substances.

​

​

Get Answer

C

64. Steam engine used in locomotive is (A) single acting, condensing type

(B) single acting, non-condensing type (C) double acting, non-condensing type (D) double acting, condensing type.

Get Answer

C

65. In a thermal power plant cooling towers are used to (A) condense low pressure steam

2. cool condensed steam
3. cool water used in condenser for condensing steam (D) cool feed water of boiler.

​

​

Get Answer

C

66. Major constituent of methane gas is (A) CO

(B) methane (C) oxygen (D) hydrogen.

​

Get Answer

B

67. Caking is

(A) making cakes of coal out of fine powders (B) a variety of free burning coals

3. coal produced from burning of wood in inert atmosphere
4. in boiler furnace some coals become plastic and form lumps or masses of coal.

​

​

Get Answer

D

68. 1 atomic mass unit is equal to (A) 1.66 x 10 ^-27 kg

(B) 1.66 x 10^-25 kg

(C) 1.66 x 10 ^-17 kg

(D) 1.66 x 10^-10 kg.

​

​

Get Answer

A

69. Particles having the same atomic number but different mass numbers arc called (A) Positrons

(B) Beta particles (C) Isotopes

(D) Decayed panicles.

​

​

Get Answer

C

70. Which of the following material can be used as a moderator ? (A) Graphite

(B) Heavy water (C) Beryllium

(D) Any of the above.

​

​

Get Answer

D

71. In closed cooling system

(A) hot water is re circulated after cooling (B) water does not flow

3. air and water cooling is simultaneously used
4. constant supply of fresh water for cooling is required.

72. A gas turbine works on (A) Carnot cycle

Get Answer

A

(B) Brayton cycle (C) Dual cycle (D) Rankine cycle.

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​

Get Answer

B

73. Maximum efficiency of an open cycle gas turbine is nearly (A) 30%

(B) 40%

(C) 50%

(D) 60%.

​

​

Get Answer

A

74. Compressor used in gas turbines is (A) reciprocating compressor

(B) plunger type compressor (C) screw compressor

(D) multistage axial flow compressor.

​

​

Get Answer

D

75. Which auxiliary of gas turbine consumes most of the power ? (A) Burner

(B) Combustion chamber (C) Compressor

(D) Fuel pump.

Get Answer

C

Get all answers at once

61.D ----- 62.D ----- 63.C ----- 64.C ----- 65.C ----- 66.B ----- 67.D ----- 68.A ----- 69.C -----

70.D ----- 71.A ----- 72.B -----73.A ----- 74.D ----- 75.C

76. Gas turbine is widely used in

1. pumping stations
2. aircraft
3. locomotives
4. automobiles.

​

​

Get Answer

B

77. In aircraft using gas turbine, the cycle used is

1. Simple
2. Regeneration
3. Reheating
4. Reheating with regeneration.

​

​

Get Answer

A

78. Overall efficiency of gas turbine is

1. equal to Rankine cycle efficiency
2. equal to Carnot cycle efficiency
3. more than Otto or Diesel cycle efficiency
4. less than Diesel cycle efficiency.

​

​

Get Answer

D

79. In the figure, constant volume cycle is represented by

(A) 1245 (B)1235 (C) 12461

(D) 12345.

​

​

Get Answer

B

80. The cycle 1236 represents

1. Otto cycle
2. Dual cycle
3. Constant pressure cycle
4. Atkinson cycle.

​

​

Get Answer

D

81. Diesel cycle is represented by

(A) 1236

(B) 1246

(C) 1245

(D) 1285.

​

​

Get Answer

C

82. Which cycle cannot be represented in the given figure ?

1. Otto cycle
2. Constant pressure cycle
3. Carnot cycle
4. Brayton cycle.

​

​

Get Answer

D

83. The horse power of a Diesel locomotive is of the order of

(A) 100 to 200

(B) 500 to 1000

(C) 2000 to 2500

(D) 10.000 to 12,000.

​

​

Get Answer

C

84. A Diesel engine consumes Diesel oil nearly at the rate of

1. 180 to 200 gm/BHP hr
2. 400 to 450 gm/BHP hr
3. 600 to 750 gm/BHP hr
4. 1 kg/BHP hr.

​

​

Get Answer

A

85. The compression ratio in case of diesel engines is

1. 5 to 7
2. 7 to 10
3. 14 to 22

(D) 25 to 36.

​

​

Get Answer

C

86. The firing order of a four cylinder engine is

(A)1-2-4-3

(B)1-4-2-3

(C) 1-2-3-4

(D)1-3-2-4.

​

​

Get Answer

A

87. The performance of engines of different HP, RPM and sizes can be compared on

the basis of

1. specific fuel consumption
2. compression ratio
3. clearance volume
4. cylinder volume.

​

​

Get Answer

A

88. Advantage of hydro-electric power station is

1. low operating cost
2. free from pollution problems
3. no fuel transportation problems
4. all of the above.

​

​

Get Answer

D

89. Which engine will have highest efficiency, between given temperature limits ?

1. Carnot cycle
2. Otto cycle
3. Diesel cycle
4. Dual cycle.

Get Answer

A

90. Which if (he following is a non-petroleum fuel ?

1. Benzol
2. Methyl alcohol
3. Ethyl alcohol
4. All of the above.

​

​

Get Answer

D

91. Heating value of diesel oil is the range

(A) 1000-1200 kcal/kg

(B) 2000-5000 kcal/kg

(C) 5000-9000 kcal/kg

(D) 9500-11000 kcal/kg.

​

​

Get Answer

D

92. Which of the following relation is correct ?

1. Weight of oxygen = 0.32 weight of air
2. Weight of oxygen = 0.32 weight of air
3. Weight of air = 0.23 weight of oxygen
4. Weight of air =2.33 x weight of oxygen.

​

​

Get Answer

A

93. How many kg of air are required for the combustion of one kg of diesel fuel ?

1. 1 kg
2. 1.3 kg
3. 4 kg

(D) 15 kg.

​

​

Get Answer

D

94. Due to burning of 1 kg of pure carbon with a minimum quantity of air required, the

percentage of carbon dioxide in the exhaust gas would be

(A) 10%

(B) 19%

(C) 29% (D) 39%.

​

​

Get Answer

C

95. Diesel engine fuels are rated by

1. Octane number
2. H.U.C.R.
3. Cetane number
4. CRF number.

​

​

Get Answer

C

96. The formula for cetane is

1. ^C16 ^H34
2. ^C12^H32
3. ^C10 ^H32
4. ^C8^H16^.

​

Get Answer

A

97. Cetane number of high speed diesel available in market is

(A) 100

2. 80 to 90
3. 60 to 75

(D) 45 to 55.

​

​

Get Answer

D

98. If a engine has spark plug, it can be safely concluded that the engine is

1. not a diesel engine
2. a two stroke petrol engine
3. a four stroke petrol engine
4. an air cooled petrol engine.

​

​

Get Answer

A

99. Air standard efficiency of a diesel engine depends on

1. compression ratio
2. speed
3. fuel
4. torque.

​

​

Get Answer

A

100. A diesel engine of a bus is stared by

1. Hand cranking
2. Self-starter
3. Compressed air
4. Mini-petrol engine.

​

​

Get Answer

B

101. In a diesel engine fuel is injected at a pressure of

(A) 10 kg/cm²

(B) 20-30 kg/cm²

(C) 60 - 80 kg/cm²

(D) 90 - 130 kgcm²

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​

Get Answer

D

102. Diesel engines.for power plants are usually

1. horizontal
2. slow speed
3. supercharged
4. air cooled.

​

​

Get Answer

C

103. A two stroke engine may be identified by

1. piston size
2. absence of valves
3. cooling system
4. lubrication system.

​

​

Get Answer

B

104. Piston rings for engines are made of

1. east iron
2. copper
3. aluminium
4. mild steel.

​

​

Get Answer

A

105. In a piston the maximum temperature occurs at

1. ring section
2. gudgeon pin
3. top sides
4. top center.

​

​

Get Answer

D

106. The temperature at which a lubricating oil will give off sufficient vapors to form

combustible mixture with air, is known as

1. Flash point
2. Fire point
3. Pour point
4. Combustion point.

​

​

Get Answer

A

107. Which temperature for a lubricating oil will be lowest ?

1. Flash point
2. Fire point
3. Pour point
4. Boiling

​

​

Get Answer

C

108. Specific gravity of diesel oil is

(A) 0.84

(B) 1.14

(C) 2.7 (D) 3.8.

Get Answer

A

109. Rank of coal is based oil

1. fixed carbon and healing value
2. ash content
3. size
4. ash and moisture content.

​

​

Get Answer

A

110. The function of piston rings in an internal combustion engine is

(A) to prevent lubrication oil from entering the combustion space (B) to prevent leakage of combustion chamber products past piston (C) to transfer heat from piston to cylinder walls

(D) all of the above.

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​

Get Answer

​

111. Which engine has the highest air fuel ratio ? (A) Petrol engine

(B) Gas engine (C) Diesel engine (D) Gas turbine.

​

​

Get Answer

D

112. Which of the following will not assist in getting high power output from a compression ignition engine ?

(A) High compression ratio (B) Fine atomization of fuel (C) High charge density

(D) Large quantity of excess air.

113. The purpose of super-charging an engine is (A) to increase the power output of the engine

Get Answer

D

(B) to reduce specific fuel consumption (C) to reduce the noise of the engine (D) to improve the cooling of cylinders.

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​

Get Answer

A

114. Most of the heat generated in internal combustion engine is lost in (A) cooling water

(B) exhaust gases (C) lubricating oil (D) radiation.

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​

Get Answer

B

115. In case of diesel engines thermal efficiency is of the order of (A) 10 to 15 percent

(B) 15 of 25 percent (C) 25 to 30 percent (D) 30 to 40 percent.

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​

Get Answer

D

116. A mixture containing 60% cetane and 40% Iso-octane will have (A) cetane number 60

(B) cetane number 40 (C) octane number 40

(D) none of the above.

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​

Get Answer

D

117. For supercharging of diesel engines, the air is supplied through (A) reciprocating compressor

(B) centrifugal blower (C) axial flow compressor (D) injector.

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​

Get Answer

B

118. The compression ratio in case of gas turbine is of the order of (A) 5 to 7

(B)10 to 15 (C) 15 to 22 (D) 22 to 30.

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​

Get Answer

A

119. A regenerator in a gas turbine (A) reduces heat loss in exhaust

(B) permits use of higher compression ratio (C) improves thermal efficiency

(D) permits use of fuels of inferior quality.

​

​

Get Answer

C

120. Out of the following diesel engines, the minimum air consumption per BHP will be

in

(A) 4 stroke, mechanical injection

(B) 4 stroke, air injection (C) 2 stroke, air injection

(D) 2 stroke, mech. injection, pump scavenging.

​

​

Get Answer

A

Get all answers at once

106.A ----- 107.C ----- 108.A ----- 109.A ----- 110.D ----- 111.D ----- 112.D ----- 113.A -----

114.B ----- 115.D -----116.D ----- 117.B -----118.A -----119.C ----- 120.A

121. For the same maximum pressure and heat input the most efficiency cycle is

1. Brayton cycle
2. Otto cycle
3. Diesel cycle
4. Dual cycle.

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​

Get Answer

A

122. For the same temperature limits and heat input, the most efficient cycle is

1. Carnot cycle
2. Otto cycle
3. Diesel cycle
4. Brayton cycle.

​

​

Get Answer

A

123. An air filter is used in

1. nuclear power plants
2. steam power plants
3. diesel engine power plants
4. hydro-power plants.

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​

Get Answer

C

124. Which of the following is not a part of diesel engine power plant ?

1. Cooling tower
2. Penstock
3. Oil pump
4. Strainer.

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​

Get Answer

B

125. Of the total heat supplied to a diesel engine plant, which one has the highest

proportion ?

1. Useful output
2. Heat lost to cooling water
3. Heat lost in exhaust gases
4. Heat loss in friction radiation, etc.

​

​

Get Answer

A

126. Supercharging of a diesel engine means

1. overloading the engine for peak load
2. operating the engine with age
3. operating engine at higher altitudes
4. supplying pressurized air during suction.

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​

Get Answer

D

127. Which power plant cannot have single units of 100 MW capacity?

1. Steam power plant
2. Nuclear power plant
3. Hydroelectric power plant
4. Diesel engine power plant.

Get Answer

D

128. In a thermal power plant, heat from the flue gases is recovered in

1. chimney
2. de-super heater
3. economizer
4. condenser.

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​

Get Answer

C

129. Which of the following is not a fire tube boiler ?

1. Cochron boiler
2. Lancashire boiler
3. Locomotive boiler
4. Babcock and Wilcox boiler.

​

​

Get Answer

D

130. In a super-heater

1. pressure rises, temperature drops
2. pressure rises, temperature remains constant
3. pressure remains constant and temperature rises
4. both pressure and temperature remains constant.

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​

Get Answer

C

131. Bagasse is

1. a variety of coal
2. a fuel consisting of wood etc.
3. fibrous portion of sugarcane left after extracting the juice

(D) a kind of rice straw.

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​

Get Answer

C

132. Which of the following is not an accessory for a boiler ?

1. Feed water pump
2. Condenser
3. Economizer
4. Air pre-heater.

​

​

Get Answer

B

133. A compound pressure gauge indicates

1. fluctuating pressures
2. pressures above atmospheric pressure
3. pressures below atmospheric pressure
4. pressures above and below atmospheric pressure.

​

​

Get Answer

D

134. For the same cylinder size and rpm which engine will produce more power ?

1. Gas engine
2. Petrol engine
3. Diesel engine
4. Super-charged engine.

​

​

Get Answer

D

135. The internal combustion engines never work on

1. Diesel cycle
2. Rankine cycle

3. Otto cycle
4. Dual combustion cycle.

​

​

Get Answer

B

136. A Joule cycle consists of

1. two isothermal and two adiabatic processes
2. two adiabatic and two constant pressure processes
3. two isothermal and two constant volume processes
4. two constant volume and two constant pressure processes.

​

​

Get Answer

​

137. In ideal diesel cycle the working substance is (A) air

2. diesel
3. mixture of air and diesel (D) any combustible gas.

​

​

Get Answer

A

138. The efficiency of an otto cycle will approach that of Carnot cycle when (A) engine is operated at high rpm

2. engine is run at high load
3. constant volume processes are replaced by isothermal processes (D) adiabatic processes are replaced by isothermal processes.

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​

Get Answer

C

139. Which power plant normally operates at high speeds ? (A) Diesel engine plant

(B) Petrol engine plant (C) Steam turbine plant

(D) Hydro-electric power plant.

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​

Get Answer

C

140. Which instrument can be used to measure the flow of a liquid through a pipe ? (A) Pitot tube

2. Venturimeter
3. Pressure gauge (D) Orifice.

​

​

Get Answer

B

141. A pitot tube is used to measure (A) energy of liquid

2. pressure of liquid
3. energy and pressure of liquid
4. energy, pressure and discharge of liquid.

​

​

Get Answer

B

142. A rotameter is used to measure (A) velocity of fluids

(B) viscosity of fluids (C) density of fluids (D) discharge of fluids.

​

​

Get Answer

D

143. Vacuum can be measured by

(A) venturimeter (B) pitot tube

(C) U tube manometer (D) rotameter.

​

​

Get Answer

C

144. A binary vapor cycle

(A) uses a fluid at two pressures in the cycle (B) uses fluid in liquid and vapor form

(C) uses two different vapors as working fluid (D) uses same fluid twice.

​

Get Answer

C

145. In a steam power plant water is used for cooling purposes in (A) boiler

(B) economizer (C) condenser (D) super-heaters.

​

​

Get Answer

C

146. Which steam will have least enthalpy

1. wet steam at 10 kg/cm²
2. dry and saturated steam at 10 kg/s cm²
3. super-heated steam at 10 kg/cm²

​

​

Get Answer

A

147. In which part of the steam power plant the pressure of steam is less than the atmospheric pressure ?

(A) Condenser (B) Boiler

3. Turbine
4. Super beater.

​

​

Get Answer

A

148. In a thermal power plant a cooling tower cools (A) steam from boiler

2. steam from turbine
3. water from economizer (D) water from condenser.

​

Get Answer

D

149. Within the boiler, the temperature of steam is highest in (A) water drum

(B) water tubes (C) water walls (D) super heater.

​

​

Get Answer

D

150. In a steam power plant which pipe line section is invariably lagged ? (A) pipes carrying steam from boiler to turbine

2. pipes carrying water from condenser
3. pipes carrying water from water treatment plant
4. pipes carrying water from boiler feed pump to boiler.

​

​

Get Answer

A

Get all answers at once

136.B ----- 137.A ----- 138.C ----- 139.C ----- 140.B ----- 141.B ----- 142.D ----- 143.C -----

144.C -----145.C -----146.A ----- 147.A -----148.D -----149.D ----- 150.A

151. Which of the following is generally not a constituent of coal ?

1. Sulphur
2. Moisture
3. Chromium
4. Hydrogen.

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​

Get Answer

C

152. Coil is generally considered to be of

1. vegetable origin
2. animal origin
3. lava origin
4. none of the above.

​

​

Get Answer

A

153. When coal analysis gives fixed carbon, volatile combustible matter, ash and

moisture the analysis is termed as

1. ultimate analysis
2. proximate analysis
3. orsat analysis
4. gross analysis.

​

​

Get Answer

B

154. API degree are used to measure

(A) specific gravity of oils

2. viscosity of oils
3. flash and fire points of fuels
4. sulphur content of fuels.

​

​

Get Answer

A

155. Sulphur content of liquid fuels assumes importance from the point of view of

1. efficiency
2. heating rate
3. corrosion
4. firing rate.

​

​

Get Answer

C

156. Fire and flash points of oils assume importance from the point of view of

1. viscosity
2. tendency to freeze during winter
3. heating value
4. ignition and storage hazards.

​

​

Get Answer

D

157. Coking is

1. formation of lumps or masses of coke in boiler furnaces at high temperatures
2. ^{heating of coal in absence of air, driving out CO}2 ^{and leaving behind the residue and} carbon
3. burning of coal in furnace
4. producing lumps of coal from fine powders with the help of a binder.

​

​

Get Answer

B

158. The air standard efficiency of a diesel engine depends on

1. compression ratio
2. speed
3. torque
4. all of the above.

​

​

Get Answer

A

159. The efficiency of steam generators is first a function of design. Beyond that,

efficiency depends upon the loading and manner of operation. Good operation consists in

1. control and limiting of air
2. minimizing combustibles in refuse and flue gas
3. maintaining clean heat transfer surfaces
4. all of the above.

​

​

Get Answer

D

160. Generally the major constituent of exhaust gases from a thermal power plant is

1. oxygen
2. carbon monoxide
3. nitrogen
4. carbon dioxide.

​

​

Get Answer

C

161. The compression ratio for diesel engines is generally in the range

1. 5 to 10
2. 14 to 22
3. 10 to 14

(D) 22 to 30.

​

​

Get Answer

C

162. Binary vapor cycles are not finding favor with designers because

1. ideal vapors are not available
2. initial cost of such plants is high
3. higher pressures demand thicker sections of piping
4. such plants are suitable for high load factors only.

​

​

Get Answer

B

163. Thermal efficiency of a gas turbine cycle improves as a result of all of the

following EXCEPT

1. heating of air before compression
2. inter-cooling of air
3. reheating of gas
4. multistage expansion.

​

​

Get Answer

A

164. Even with best possible arrangements, the thermal efficiency of a gas turbine

cycle is always below

(A) 10%

(B) 20%

(C) 25% (D) 40%.

​

Get Answer

D

165. The scavenging efficiency of a 4 stroke diesel engine is usually in the range

(A) 50% to 60%

(B) 60% to 75%

(C) 75% to 90%

(D) 95% to 100%.

​

​

Get Answer

D

166. Spot the odd one out

1. Coke-oven as
2. Water gas
3. Freon gas
4. Producer gas.

​

​

Get Answer

C

167. The cooking gas used in our homes is a by product of

1. steel plants
2. fertilizer plant
3. petroleum refineries
4. paper plants.

​

​

Get Answer

C

168. In power plants cooling towers are used to

1. cool exhaust steam
2. cool repeated steam
3. cool feed water
4. cool condenser outlet water.

​

​

Get Answer

D

169. Electrostatic precipitator is installed between

1. coal bunker and boiler
2. boiler furnace and chimney

3. economizer and air heater
4. condenser and economizer.

​

​

Get Answer

B

170. Which of the following equipment is installed to minimize pollution of surroundings

?

1. Water treatment plant
2. De-super heaters
3. Cooling towers
4. Electrostatic precipitators.

Get Answer

D

171. Fly ash : Non-combustible particle : : Cinders:

1. charred coil
2. moisture
3. dust
4. fog.

​

​

Get Answer

A

172. The path followed by the gases discharged from chimney called the 'plume',

depends on

1. thermal properties of gases
2. dynamic properties of gases
3. wind direction
4. all of the above.

​

​

Get Answer

D

173. In diesel engines, the injection pressure is of the order of

1. 2 kg/cm²
2. 20 kg/cm²
3. 100 kg/cm²
4. 400 kg/cm².

​

​

Get Answer

C

174. In a turbine blades acts as

1. moving blades in impulse turbine stages
2. moving lades in reaction turbine stages
3. reversing blades in velocity stages of impulse turbines
4. any of the above.

​

​

Get Answer

D

175. Topping turbines are

1. high pressure non-condensing units installed in existing plants to exhaust into existing low pressure turbines
2. those which divert major parts of the throttle steam at intermediate stages of the turbine of process unit
3. introduce and remove steam into the turbine after the throttle (D) none of the above.

​

Get Answer

A

176. In case of non-condensing turbines the back pressure is

1. atmospheric
2. below atmospheric pressure
3. above atmospheric pressure
4. depends on the size of turbine.

​

​

Get Answer

C

177. In all of the following turbines the back pressure will be above the atmospheric

pressure EXCEPT

1. Topping turbine
2. First turbine of repeat cycle
3. Condensing turbine
4. Non-condensing turbine.

​

​

Get Answer

C

178. In bleeder turbines, part of the steam is extracted for

1. heating secondary air
2. fed water heating
3. reheating
4. condensation.

​

​

Get Answer

B

179. As compared to steam at entry to the turbine, which of the following will be larger at exit ?

(A) Pressure (B) Flow rate

(C) Specific volume (D) Specific enthalpy.

​

Get Answer

C

180. Pelton wheels are installed on (A) run of river plants with pondage

(B) run of river plants without pondage (C) base load plant

(D) high head plants.

181. Suspended solids can be removed from water by (A) settling

Get Answer

D

(B) coagulation (C) filtration

(D) any of the above.

​

​

Get Answer

D

182. Dissolved solids in water can be removed/reduced by (A) distillation

(B) demineralization (C) softening

(D) any of the above.

​

​

Get Answer

D

183. Small domestic electric power generators are usually of capacity around (A) 10 kVA

(B) 5 kVA (C) 1 kVA (D) 100 VA.

​

​

Get Answer

C

184. Producer gas is a by product from (A) fertilizer plants

(B) steel plants (C) paper plants

(D) sugar mills.

​

​

Get Answer

B

185. Sour crude

1. is corrosive when heated
2. evolves significant amounts of hydrogen sulphide on distillation (C) produces light fractions which require sweetening

(D) all of the above.

​

​

Get Answer

D

186. Dam: Hydro plant:: (A) Chimney : Gases

2. Coal: Steam plant
3. Gas turbine: Steam turbine (D) Reactor: Nuclear plant.

​

​

Get Answer

D

187. Bulb turbines are

(A) high speed turbines (B) high pressure turbines (C) low head turbines

(D) high head turbines.

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C

188. A frauds turbine is

(A) Inward flow reaction turbine (B) Inward flow impulse turbine

(C) Outward flow reaction turbine (D) Outward flow impulse turbine.

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A

189. In hydro power plants

(A) Initial cost is high and operating cost is low (B) Initial cost as well as operating costs are high (C) Initial cost is low and operating cost is high (D) Initial cost as well as operating cost is low.

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A

190. In which of the following power plant the availability of power is least reliable ? (A) Solar power plant

2. Wind energy
3. Tidal power plant
4. Geothermal power plant.

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B

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Computation

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Electric Power Generation Theory Section

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Electric Power Generation MCQ's Section

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Electric Power Generation True - False

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Electric Power Generation Fill in the blanks

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Electric Power Generation : Multiple Choice Questions

Objective Questions > Multiple Choice Questions of Generation of Electric Power (191- 205):

191. Geothermal energy is

(A) a renewable energy resource (B) alternative energy source

(C) inexhaustible energy source (D) any of the above.

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D

192. The disadvantage of renewable sources of energy is (A) lack of decidability

(B) availability in low energy densities (C) intermittency

(D) all of the above.

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D

193. In the Geysers steam is continuously vented through fissures in the ground. These vents are called

1. vent holes
2. pot holes (C) fumaroles

(D) sun spots.

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C

194. Geologists believe that below the earth's crust, the molten mass exists in the form of (A) magma

(B) vent (C) hot cell

(D) liquation.

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A

195. In hydrothermal source of geothermal energy (A) hot water or steam is available

2. hot gases are available
3. molten lava is available (D) none of the above.

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A

196. In axial flow turbines

(A) only part of the available head is converted into velocity before the water enters the wheel (B) water is admitted over part of the circumference

3. it is possible that the wheel may run full
4. it is possible to regulate the flow.

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C

197. In hydrothermal systems when steam, water and dissolved solids are available as source of energy, the entrained solids are removed by

(A) filters

(B) centrifugal separators (C) strainers

(D) none of the above

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B

198. Presence of sand in geopressurized water is likely to cause problems of (A) erosion

(B) heat exchange (C) water circulation (D) all of the above.

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A

199. Presence of non-condensable gases in geopressurized water causes (A) corrosion of parts

2. pollution
3. flow problems (D) all of the above.

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D

200. When geothermal energy is available in the form of saline water, power is developed using

1. flashed-steam system
2. binary-cycle system (C) total flow system (D) any of the above.

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D

201. Petrothermal systems are composed of hot dry rock with (A) no underground water

(B) large underground water (C) petrochemicals

(D) dense gases.

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A

202. In petrothermal systems of geothermal energy there is hot dry rock but no underground water. In such systems energy is obtained by

(A) circulating compressed air (B) pumping water

3. creating water wells
4. none of the above.

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B

203. Reflecting mirrors used for exploiting solar energy are called (A) diffusers

2. ponds
3. heliostats (D) mantle.

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C

204. Which of the following area is preferred for solar thermal electric plants ? (A) mountain tops

(B) hot arid zones (C) coastal areas

(D) high rainfall zones.

205. In solar thermal conversion systems the solar heat is transferred to (A) water-steam

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B

(B) liquid metals (C) molten salts

(D) any of the above.

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D

206. Photovoltaic solar energy conversion system makes use of

1. fuel cell
2. solar cell
3. solar pond
4. none of the above.

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B

207. Solar cells are made of

1. silicon
2. germanium
3. silver
4. aluminium.

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A

208. The voltage of a single solar cell is (A) 0.5 V

(B) 1 V (C) 1.1 V

(D) 5 W.

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A

209. The output of a solar cell is of the order of (A) 0.1 W

(B) 0.5 W (C) 1 W (D) 5 W.

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C

210. A module is a

1. newly installed solar cell
2. series parallel arrangement of solar cells
3. a series of solar cells when not used for power generation (D) none of the above.

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B

211. The major disadvantage, with solar cells for power generation is (A) lack of availability

(B) large area requirement (C) variable power

(D) high cost.

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D

212. The maximum theoretical efficiencies of solar sales could be around (A) 99%

(B) 60%

(C) 48%

(D) 1%.

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C

213. The source of energy for satellite is (A) battery

2. solar cell
3. cryogenic storage (D) any of the above.

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B

214. Winds caused by greater solar heating of the earth's surface near the equator than near the northern or southern poles, are known as

1. local winds
2. equatorial winds (C) planetary winds (D) trade winds.

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C

215. Local winds are caused by (A) differential heating of land and water

(B) differential heating of plains and mountains (C) any of the above

(D) none of the above.

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C

216. The total power of a wind stream is proportional to

1. velocity of stream
2. ( velocity of stream )²
3. (velocity of stream )³ (D) 1/ (velocity of stream)

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C

217. Tidal energy mainly makes use of (A) kinetic energy of water

2. potential energy of water
3. both kinetic as well as potential energy of water (D) none of the above.

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B

218. Which of the following is a reaction turbine (A) Banki turbine

(B) Jonval turbine (C) Girard turbine

(D) None of the above.

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D

219. All of the following are electrical mechanical storage systems EXCEPT (A) Pumped hydro-system

(B) Torsion bar system (C) Super-conducting coils (D) Kinetic flywheels.

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C

220. Thermal storage of energy is possible in the form of (A) sensible heat

2. latent heat
3. chemical reaction (D) any of the above.

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D

221. Turn around efficiency of pump hydro-schemes seldom exceeds (A) 10%

(B) 15%

(C) 25%

(D) 65%.

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D

222. Batteries used for electrical energy storage are (A) Laclanche cells

(B) Edison cells (C) Lead acid cells

(D) Any of the above.

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C

223. Turn around efficiency of battery energy storage system is around (A) 75 percent

2. 50 percent
3. 25 percent
4. 10 percent.

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A

224. Sodium sulphur batteries use electrolyte consisting of (A) solid aluminium oxide

(B) dilute sulphuric acid (C) brine

(D) KOH.

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A

225. Certain metals become super-conducting when cooled below (A) melting point

2. transition temperature
3. 0⁰ K
4. 0⁰ C.

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B

226. Which power plant is free from environmental pollution problems ? (A) Thermal power plant

(B) Nuclear power plant (C) Hydro-power plant

(D) Geothermal energy power plant

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C

227. Chemical representation for heavy water is ^{(A) H}2⁰

^{(B) H}2^O2 ^{(C) H}3^{0 (D) D}3^O.

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D

^{228. The presence of CO}2 ^{and H}2^{O in the atmosphere results in absorption of} (A) short wave ultra-violet radiations

(B) visible wavelengths of spectrum (C) long wave infrared radiations (D) all of the above.

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C

229. Return to earth of the oxides of sulphur and nitrogen occurs in the form of (A) acid rain

(B) acid snow (C) acid fog

(D) any of the above.

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D

230. The average pH of normal rainfall is usually (A) neutral

(B) slightly acidic (C) slightly alkaline.

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B

231. Earth coal (A) lignite

(B) coal dust (C) black earth (D) wet coal.

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A

232. Ebb current is

1. the same as eddy current
2. the movement of the tidal current away from shore or down a tidal stream (C) the removal by screen of undesirable fine materials from broken are

(D) none of the above.

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B

233. Ekman spiral is an idealized mathematical description of (A) ocean temperature gradient

(B) wind distribution in the planetary boundary layer (C) carbon dioxide percentage variation with elevation (D) radioactive decay of materials.

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B

234. Which of the following converts electrical energy to radiant heat ? (A) Solar cell

(B) Storage battery (C) Wankel engine

(D) Incandescent lamp.

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D

235. Which of the following converts thermal energy to kinetic energy ? (A) Thermocouple

(B) Storage battery (C) Fuel cell

(D) Rocket.

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D

236. Beneficiation process is mainly used for

1. coals
2. oils
3. nuclides
4. minerals.

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A

237. Betz law finds application in

1. MHD systems
2. Solar cells
3. Geothermal power plants
4. Wind mills.

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D

238. Cleat is

(A) main joint in a coal seam along which it breaks most easily (B) floor of a coal seam

3. carton and sulphur compound
4. crude oil containing low percentage of sulphur.

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A

239. Coal broken into angular fragments is known as (A) coal briquettes

(B) coal breccia (C) coal bank (D) coal auger.

240. Coal rank classifies coal according to its (A) carbon percentage

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B

2. ash content
3. degree of metamorphism (D) density.

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C

241. Baryon is one of the class of heavy elementary particles that includes (A) hyperons

(B) neutrons (C) protons

(D) all of the above.

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D

242. Isotopes of uranium ^{(A) U}235

^{(B) U}234 ^{(C) U}238

(D) all of the above.

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D

243. Baume scale measures (A) purity of water

2. radioactivity
3. specific gravity of liquids

(D) specific gravity of gases.

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C

244. Beaufort scale is used to measure (A) beta and gamma radiations

(B) with speed (C) isolation

(D) depth of sea.

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B

245. Beaufort scale is graded from 0 to (A) 10

2. 12
3. 22

(D) 100.

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B

246. API gravity is expressed in terms of (A) gm/cc

(B) dimensionless numbers (C) degrees

(D) none of the above.

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C

247. Argillaceous rocks have (A) high clay content

(B) high moisture content

(C) low moisture content (D) low mineral content.

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A

248. ASTM coal classification is based on (A) proximate analysis

(B) ultimate analysis (C) orsat analysis

(D) none of the above.

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A

249. Barn

(A) spent fuel from a nuclear reactor (B) a unit of area

(C) an electronic instrument for rapid counting of radiation (D) a coal that does not form coke.

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B

250. One barrel is nearly (A) 0.96 cubic meter

(B) 0.44 cubic meter (C) 0.16 cubic meter

(D) 0.013 cubic meter.

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C

251. Activated carbon is used for

(A) absorption, of gases

2. paints and varnishes as coloring agent
3. production of carbon steels
4. purification of water.

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A

252. The phenomenon of physical adhesion of molecules to the surfaces of solids without chemical reaction is known as

(A) dredging (B) coking (C) adsorption (D) liquation.

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C

253. Solid or liquid panicles of microscopic size which are suspended in air or another gas form what is known as

(A) aerosol (B) hyperon (C) geognosy (D) eluvium.

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A

254. Air curtains find applications in (A) air conditioned spaces

2. green houses
3. nuclear power pants (D) solar energy systems.

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A

255. The percentage of carbon in anthracites is generally (A) more than 90%

2. around 75%
3. between 50% and 70% (D) below 50%.

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A

256. In a 2 stroke engine there is one power stroke in

1. 90^c of crank rotation
2. 180^c of crank rotation
3. 360^c of crank rotation
4. 720^c of crank rotation.

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C

257. A fast breeder reactor

(A) operates with fast neutrons and produces less fissionable material than it consumes (B) operates with fast neutrons and produces more fissionable material than it consumes (C) operates with slow neutrons and produces less fissionable material than it consumes (D) operates with slow neutrons and produces more fissonable material than it consumes.

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258. Fluidized bed combustion helps to reduce (A) boiler size

2. pollution
3. both (A) and (B) above.

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C

259. Fly ash generally results from (A) gas turbines

2. diesel engines
3. pulverized coal boilers (D) fluidized bed boilers.

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C

260. In a boiler, the carry over of slugs of water into the piping due to dirty water is termed as

(A) beating (B) foaming (C) seal ping (D) pitting.

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B

261. If a engine has a spark plug, it is concluded that the engine is a (A) petrol engine

(B) diesel engine (C) carnot engine (D) joute engine.

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