Physics Heat interview questions

The coolant used in radiators of automobile engines are

1. Diesel
2. Ice
3. Petrol
4. Water

The reverse process of vapour becoming liquid is

1. Vapourisation
2. Freezing
3. Condensation
4. Sublimation

The process by which a liquid changes into solid is

1. Condensation
2. Boiling
3. Fusion
4. Freezing

The latent heat of fusion of paraffin wax is

1. 0.92x105
2. 1.8x105
3. 1.13x105
4. 3.21x105

When sugar is dissolved in water

1. Water is evaporated
2. Water is boiled
3. Water is condensed
4. Water is cooled

The formula to calculate the thermal capacity of a substance is

1. mass x specific heat capacity
2. mass x R.D
3. mass x temperature rise
4. mass x density

The value of J is

1. 7.35 J/cal
2. 4.186 Joule/cal
3. 4.816 Joule/cal
4. 4.180 J/cal

The amount of water vapour present in atmospheric is known as

1. Specific gravity
2. Vapour density
3. Density
4. Humidity

The unit of Humidity is

1. Kg2/m
2. Kg/m2
3. g/m3
4. Kg/m3

The lowest temperature that can be obtained using a freezing mixture is

1. 0°C
2. -23°C
3. 32°C
4. -32°C

The amount of heat required to raise the temperature of 1 Kg of a substance by one Kelvin is

1. Thermal capacity
2. Specific heat capacity
3. Latent heat
4. None of the above

The pressure of the steam inside the pressure cooker is

1. 2 atmosphere
2. 3 atmosphere
3. 4 atmosphere
4. 5 atmosphere

The main source of Heat Energy is

1. Venus
2. Moon
3. Sun
4. Star

The process of changing a substance from solid to liquid state is

1. Freezing
2. Sublimation
3. Melting
4. Evaporation

The boiling of water inside the pressure cooker is

1. 0°C
2. 100°C
3. 120°C
4. -120°C

Water pipes in winter burst in cold countries due to

1. High pressure
2. Low pressure
3. Solidification of water
4. Too much of cold

The amount of heat required to raise the temperature of a substance by one Kelvin is

1. Thermal capacity
2. Specific heat capacity
3. Latent heat
4. None of the above

The unit of thermal capacity is

1. JK
2. J kg/K
3. J/K
4. J/m

The specific heat capacity is minimum in

1. Water
2. Wood
3. Mercury
4. Ice

The change from the solid to gaseous state directly without becoming liquid is called

1. Sublimation
2. Freezing
3. Condensation
4. Vapourisation

The volatile liquid used in refrigerator is

1. Acetone
2. Helium
3. Freon
4. Water

The latent heat of vapourisation of water is

1. 2.3x106 J Kg-1
2. 3.3 x106 J Kg-1
3. 3.8 x106 J Kg-1
4. 2 x106 J Kg-1

The unit of latent heat is

1. Joule/Kelvin
2. Joule/kg-1
3. Joule/kg
4. Joule

Heat is measured in

1. Degree
2. Joule
3. Celsius
4. Kelvin

Calorimeter is a device for measuring

1. Specific heat capacity
2. Specific gravity
3. Temperature
4. Latent heat

Different metals in the bimetallic strips are

1. Nickel and aluminium
2. Iron and aluminium
3. Brass and iron
4. Brass and Nickel

The specific heat capacity is maximum in

1. Mercury
2. Kerosene
3. Wood
4. Water

The transformation of a liquid to the gaseous state is called

1. Vapourisation
2. Sublimation
3. Solidification
4. Boiling

The ration of salt and ice in the freezing mixture is

1. 1:3
2. 2:3
3. 3:1
4. 4:1

The melting point of silver is

1. 80°C
2. 269°C
3. 961°C
4. 1083°C