Question # 1

In building central heating system works on the process of:

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Covection

Radiation

Conduction

both a and b

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

Convection of heat is the process of heat transfer due to the

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

Land and sea breezes are the result of:

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Absorption

Radiation

Conduction

Convection

Convection of heat is the process of heat transfer due to the:

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

How does heat reaches form sun to earth through?

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Conduciton

Convection

Radiation

None

Flow of thermal energy from hot body cold body is called:

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Specific heat

Latent heat

Transfer of heat

Heat capacity

At night , the air from land to begins towards sea called:

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Land breeze

Sea breaze

Both A and B

Radiation

A silvery white surface is a :

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Worst reflector

Best reflector

Worst absorber

Best absorber

There are ways to transfer the heat from one place to another.

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1

2

3

4

In houses, good thermal insulation means _____________ consumption of fuel:

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Lower

Higher

Normal

None

The temperature of a black dull surface on heating :

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Rise Rapidly

Fall Rapidly

Becomes zero

Remain constant

In gases, heat in mainly transferred by:

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Molecular collision

Conduction

Convection

Radiaiton

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