Self evaluation - Thermal conductivity of metal rod

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Which one of the following forms of water have the highest value of thermal conductivity?

1 point

Boiling water

Steam

Solid ice

Melting ice

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Choose the false statement

1 point

For pure metal thermal conductivity is more

Thermal conductivity decreases with increase in the density of the substance

Thermal conductivity of dry material is lower than that of damp material

Heat treatment causes variation in thermal conductivity

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Thermal conductivity is defined as the heat flow per unit time

1 point

When temperature gradient is unity

Across the wall with no temperature

Through a unit thickness of the wall

Across unit area where temperature gradient is unity

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a student

a faculty

an industry professional

from general public

The heat energy propagation due to conduction heat transfer will be minimum for

1 point

Lead

Water

Air

Copper

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Most metals are good conductor of heat because of

1 point

Transport of energy

Free electrons

Lattice defects

Capacity of absorb energy

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