ELECTRICAL MACHINE QUIZ

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ELECTRICAL MACHINE QUIZ_53

DC GENERATOR

Q.91 The magnetic field strength is defined as__

1 point

MMF per unit length of the magnetic flux path

MMF per unit length of the conductor

Emf per unit length of conductor

none of the above

Clear selection

Q.92 The frequency of generated emf is given by

1 point

f = 120/ PN

f = PN / 120

f = 120 N/P

f = 120 P/N

Clear selection

Q.93 what is the average emf generated in one stator conductor?

1 point

2 f volts

2 fф volts

2 fNф volts

2 fфP volts

Clear selection

Q.94 RMS value of generated emf per phase is given by

1 point

Ep = 4.44 фTph volts

Ep = 44.4 fфTph volts

Ep = 4.44 fфTph volts

Ep = 4.44 fTph volts

Clear selection

Q.95 what is the actual generated emf per phase if the stator winding is distributed and short pitched?

1 point

Ep = 4.44kw fфTph volts

Ep = 4.44 fфTph volts

Ep = 4.44kw fTph volts

Ep = 4.44kw fф volts

Clear selection

Q.96 what will be the average emf generated per phase?

1 point

2ф volts

2f volts

fф volts

2fф volts

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Q.97 what is DC generator?

1 point

A machine which converts wind energy into electrical energy

A machine which converts mechanical energy into electrical energy

A machine which converts electrical energy into mechanical energy

A machine which converts hydro energy into electrical energy

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Q.98 A DC generator is operated on ___

1 point

statically induced emf

mutually induced emf

dynamically induced emf

self induced emf

Clear selection

Q.99 Which of the following is/are necessary to produce emf?

1 point

conductors

magnetic field

motion of conductor’s w.r.t magnetic field

all of the above

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Q.100 In a dynamically induced emf

1 point

conductor is stationary and magnetic field is moving

magnetic field is stationary and conductors are moving

conductors and magnetic field both are stationary

conductors and magnetic field both are moving

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Q.101 A rotating machine has mainly ___

1 point

two parts, stator and rotor

two parts, stator and separated by an air gap

two parts, rotor, separated by an air gap

three parts, stator and rotor, separated by an air gap

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Q.102 which of the following is/are true of stator?

1 point

it does not move

is outer frame of the machine

it houses all integral parts of machine

all of the above

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Q.103 The ____ the inner part of the machine.

1 point

rotor

rotor winding

bearing

Option 4

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Q.104 which of the following part of machine is free to move?

1 point

Stator

yoke

rotor

winding

Clear selection

Q.105 The stator and rotor of the machine is made up of__

1 point

paramagnetic material

ferromagnetic material

ferrite

diamagnetic material

Clear selection

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