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Heat Transfer

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

volume
area
length
none of the listed here

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Heat Transfer
(NRe.NPr)(D/L) is called the __________ number

None of these
Stanton
Graetz
Peclet

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Heat Transfer
With increase in temperature, the thermal conductivity of a gas

Increases
Remains same
May increase or decrease depending on the type of gas
Decreases

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Heat Transfer
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

Hardness
Suspended solids content
All of these
Dissolved soilds content

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Heat Transfer
A __________ evaporator employs an annular downtake.

None of these
Horizontal
Basket type
Long tube vertical

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Heat Transfer
Prandtl and Reynold's analogies are identical for Prandtl number value of

0.5
5
1

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