Question # 1

Mean free path of gas molecules is inversely proportional to its.

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Volume

Pressure

Temperature

Weight

What is the represented by the area inside the Carnot cycle.

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Heat taken to increase the body temperature.

Energy loss due to leakage

Useful work done

Heat rejected by the system

Which of the following measures how quickly the thermometer liquid mainly because it

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Is coloriess

Is a bad conductor of heat

Does not expand linearly

Has a low boiling point

Which of the following devoices are used for measuring temperature.

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Thermocouples

Thermistors

Thermometers

All of these

The zero point of Kelvin scale is called.

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Critical point

Terminal point

Absolute zero

Mid point

During an adiabatic gas expansion the environment

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Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

In onw cycle of a steam engine there are how many dead centres.

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1

2

3

zero

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

The mechanical equivalent of heat

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Has the same dimension as heat

Has the same dimension as work

Has the same dimensions as energy

Is dimensionless

What happens to internal energy of a piece of lead when hammered.

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Increases

Decreases

Remains unchanged

Becomes zero

Woolen clothing a effective in keeping us warm because.

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An trapped int he wool acts as an insulator

Heat loss by convection and radiation is prevented

Wool is bad traciator and good absorber of heat

Wool can retain high temperatures

In general work done on or by a gas depends on.

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The initial state only

The final state only

The initial and final states

The initial state the final state and the path

By definition a gas is said to be have undergone adiabatic compressing when

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No heat exchange occurs between the gas and its surroundings

The gas is compressed quickly

The gas is compressed slowly

The temperature of the gas remains constant

When the temperature of source and sink of a heat engine become equal the entropy change will be.

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Zero

Maximum

Minimum

Negative

Which of the following is the science of measuring the heat of chemical reactions or physical changes.

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Thermometry

Calorimetry

Telemetry

Photometry

Which temperature is the absolute measure of temperature.

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Thermodynamic temperature

Freezing point

Boiling point

Absolute zero

Real gases obey gas laws only at

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Low pressure and high temperature

High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

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