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Heat Transfer

Heat Transfer
__________ chart is known as transient heat conduction chart.

Cox
Dirhing's
Mollier's
Heisler's

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Heat Transfer
What is the unit of thermal conductivity ?

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

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Heat Transfer
Maximum water velocity in tubes of a 1-2 shell and tube heat exchanger may be around __________ metres/second.

10
20
30
1

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Heat Transfer
The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is

4.36
120.36
2.36
Dependent on NRe only

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Heat Transfer
Kirchoff's law is applicable to

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

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Heat Transfer
Kg of liquid evaporated per hour in an evaporator is defined as its

Steam load
Economy
None of these
Capacity

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