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Heat Transfer

Heat Transfer
Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.)

√d
d
d1.5
d2

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Heat Transfer
Increasing the liquor level in the evaporator results in the

increased true temperature drop
decreased effect of hydrostatic head
decreased capacity
increase in liquor film co-efficient

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Heat Transfer
Reynold's analogy states that (where, St = Stanton number f = friction factor)

St = f1/2
St = f/4
St = f/2
St = 4f

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Heat Transfer
What is the unit of thermal conductivity ?

Kcal/hr.m.°C
Kcal/hr.m
Kcal/hr. °C
Kcal/hr. m² °C

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Heat Transfer
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

transition
highly turbulent
None of the listed here
laminar

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Heat Transfer
The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.

May increase or decrease ; depends on the material
Increases
Decreases
Remains constant

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MORE MCQ ON Heat Transfer

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