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Heat Transfer

Heat Transfer
jH factor for heat transfer depends upon the __________ number.

Nusselt
Reynolds
Prandtl
Biot

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Heat Transfer
LMTD can't be used as such without a correction factor for the

Multipass heat exchanger
Baffled heat exchanger
Condensation of mixed vapour in a condenser
All of these

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Heat Transfer
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

(εx + εy)/(εx + εy - εx . εy)
Εx . εy
Εx + εy
1/εx + 1/εy

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Heat Transfer
The number of kg vaporised per kg of steam fed to the evaporator is defined as

Rate of evaporation
Rate of vaporisation
Capacity
Economy

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Heat Transfer
If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid

Remains unchanged
Increases
Increases or decreases depending on number of shell passes
Decreases

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Heat Transfer
The unit of heat transfer co-efficient in SI unit is

W/m°K
J/m°K
J/M2°K
W/m2°K

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MORE MCQ ON Heat Transfer

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