Question # 1

Efficiency of steam locomotive is.

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8%

10%

9%

7%

Which is the process in which temperature of the system remains constant.

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Adiabatic process

Isochoric process

Isothermal process

Isobaric process

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

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

No of spark plugs needed in the diesel engine are.

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0

1

2

3

The mean kinetic energy of gas is at.

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0 ^oC

-273 ^oC

100 K

100 ^oC

The internal energy of system does not depend on

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Temperature

Pressure

Path

Final and initial state

Which of following is irreversible process

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Slow compression of an elastic spring

Slow evaporation of substances in isolated vessel

Slow expansion of a gas

A chemical explosion

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

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%

At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

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

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

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Physics Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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