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Heat Transfer

Heat Transfer
The unit of conductance in SI unit is

W/m°K
W/°K
W/m
W/m²

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Heat Transfer
Black liquor generated during paper manufacture is concentrated in a

multiple effect evaporators followed by a crystalliser
single effect evaporator followed by a crystalliser
multiple effect evaporator
single effect evaporator

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Heat Transfer
In case of evaporators, liquid entrainment results primarily due to

high heat transfer rate
foaming of the solution
high vacuum in the evaporator
high heat transfer rate

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Heat Transfer
The critical radius 'r' of insulation on a pipe is given by

r = 2k/h
r = h/k
r = k/2h
r = k/h

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Heat Transfer
The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film )

(ΔT)2
None of the listed here
(ΔT)1/4
ΔT

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Heat Transfer
The Graetz number is concerned with the

heat transfer in turbulent flow
absorption with chemical reaction
mass transfer between a gas and a liquid
heat transfer in laminar flow

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MORE MCQ ON Heat Transfer

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