Question # 1

A cycle of petrol engine undergoes

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Two process

Three process

Four process

single process

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

Heat is form of.

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Power

Momentum

Energy

Torque

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

Environmental crisis are also known as

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Population crisis

Entropy crisis

War crisis

Mass crisis

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

Size of the molecules is much smaller as compared to the

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Mass of the molecules

Distance between the molecules

Density of the molecules

Volume of the molecules

Transformation of heat other forms of energy is discussed in

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Thermal physics

Thermodynamics

Atomic physics

Nuclear physics

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

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Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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