Heat Transfer

91. Which of the following is expected to have highest thermal conductivity

1. steam
2. solid ice
3. melting ice
4. water
5. boiling water.

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92. Which of the following is the case of heat transfer by radiation

1. blast furnace
2. heating of building
3. cooling of parts in furnace
4. heat received by a person from fireplace
5. all of the above.

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93. Which of the following property of air does not increase with rise in temperature

1. thermal conductivity
2. thermal diffusivity
3. density
4. dynamic viscosity
5. kuiematic viscosity.

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