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Heat Transfer

Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

0.6
0.2
0.4
0.8

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Heat Transfer
In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head

four times
twice
square root of
none of the listed here

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Heat Transfer
According to Reynolds analogy, Stanton number is equal to

f/2
f/4
f
2f

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Heat Transfer
Kirchoff's law is applicable to

Only volumes and not to surfaces
Monochromatic radiation only
Both A and B
Total radiation only

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Heat Transfer
__________ heat exchanger is used for chilling oil to be dewaxed.

Double pipe
Fixed tube
Floating head
U-tube

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Heat Transfer
A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m².K. The Biot number is

3.5
0.025
5.6
0.0035

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