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Heat Transfer

Heat Transfer
Prandtl number for most of dry gases is about

0.001
150
70
0.72

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Heat Transfer
Radiation heat transfer rates does not depend upon the

distance between the heat source and the object receiving the heat
surface area and temperature of the heat source
type of absorbing surface
none of the listed here

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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

All of these
Suspended solids content
Hardness
Dissolved soilds content

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Heat Transfer
What is the unit of thermal conductivity ?

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

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Heat Transfer
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?

None of the listed here
Catchall
Vent
Bleed point

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Heat Transfer
Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is

> 5
< 1
> 1
1

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MORE MCQ ON Heat Transfer

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