8. Thermal conductivity of non-metallic amorphous solids with decrease in temperature
A.Increases
B.Decreases
C.Remains constant
D.May increase or decrease depending on temperature

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9. The insulation ability of an insulator with the presence of moisture would
A.Increase
B.Decrease
C.Remain unaffected
D.May increase/decrease depending on temperature and thickness of insulation

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10. Depending on the radiating properties, a white body will be white when
A.ρ = 0, τ = 0 and α = 1
B.ρ = 1, τ = 0 and α = 0
C.ρ = 0, τ = 1 and α = 0
D.τ = 0, α+ρ = 1

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11. Which of the following is a case of steady state heat transfer
A.I.C. engine
B.Air preheaters
C.Heating of building in winter
D.None of the above

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12. The wave length of the radiation emitted
A.Depends on temperature only
B.Depends on material of body
C.Does not depend on material of body
D.Both (A) and (C) above

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13. Pick up the wrong case. Heat flowing from one side to other depends directly on
A.Face area
B.Time
C.Thickness
D.Temperature difference

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14. Thermal conductivity of air with rise in temperature
A.Increases
B.Decreases
C.Remains constant
D.May increase or decrease depending on temperature

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