Thermodynamic Processes

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In as isochoric process

2 points

pressure is contant

no heat exchange takes place

there is no work done

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the expansion-valve is a

2 points

pressure lowering device

pressure increasing device

temperature increasing device

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Fuel and air are mixed and burnt at constant ________ in the combustion chamber.

2 points

volume

temperture

pressure

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Constant pressure process is explained by

2 points

Charles law

Boyles law

Second law of thermodynamics

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The current temperature of empty space in the universe is about ________.

2 points

2.7Kelvins

-273.15ºC

0 Kelvins

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______ cannot be regarded as a perfect gas.

2 points

Air

Common gases

Steam

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In the compressor of Gas turbine Engine, the fresh air air is compressed

2 points

isothermally

isobarically

adiabatically

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In PV = mRT, the units of R are

2 points

J/(kg.K)

J/K

(J.Litre)/(Kg.K)

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Heat pumps transfers heat from

2 points

high temperature to low temperature

low temperature to high temperature

high temperature to moderate temperature

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In a heat Pump , On the discharge side of the compressor, the hot and highly pressurized gas is cooled in a heat exchanger called a ______________

2 points

condenser

evaporator

extract valve

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In PV = mRT, R is the

2 points

Ratio Constant

Gas Constant

Radius

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Since the heat pump uses a certain amount of work to move the heat, the amount of energy deposited at the hot side is ________ the energy taken from the cold side.

2 points

greater than

less than

same as

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Adiabatic processes have similar P-V diagrams to _____________ processes

2 points

adiabatic

isochoric

isothermal

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In an isothermal process

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temperature depends upon the pressure

there is no heat exchange

temperature remains constant

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An open system is one in which there is

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a transfer of mass across the boundaries

no transfer of mass across the boundaries

defined inflexible boundaries

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If the gas is heated or cooled at constant Volume its pressure will increase or decrease. This is also known as

2 points

isobaric process

isometric process

adiabatic process

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Second law of thermodynamics

2 points

Heat can pass spontaneously from a colder to a hotter body

Heat can never pass spontaneously from a hotter to a colder body

Heat can never pass spontaneously from a colder to a hotter body

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If a perfect gas is cooled at constant pressure, its volume is proportional to its

2 points

pressure

absolute temperature

total mass

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In an adiabatic process,

2 points

no heat is transferred between the working fluid and its surroundings

temperature remains constant

pressure remains constant

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