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Heat Transfer

Heat Transfer
_______ paint has the maximum absorption coefficient.

Black
Grey
Yellow
White

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Heat Transfer
For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are

Different
Linearly related
Never different
Same

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Heat Transfer
Heat flux is the time rate of heat transfer per unit

length
volume
none of the listed here
area

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Heat Transfer
With increase in temperature, the thermal conductivity of non-metallic amorphous solids

None of the listed here
decreases
remains same
increases

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Heat Transfer
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used

Because of its low cost
In high range of temperature differences
To prevent corrosion of the tube bundles
In low range of temperature differences

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Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to

Δt2
Δt
Δt5/4
Δt1/2

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