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Heat Transfer

Heat Transfer
Reynold's analogy states that

Nst α NRe
NRe α f
NNu α f
Nst α f

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Heat Transfer
For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it

All of these
Is more economical
Is easy to operate and maintain
Occupies smaller space

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Heat Transfer
Radiator of an automobile engine is a __________ type of heat exchanger.

Cross-current
Co-current
Counter-current
Direct contact

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Heat Transfer
A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is

125
150
133
160

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Heat Transfer
Radiation energy is emitted by all the substances, which are above

0°K
100°C
none of the listed here
0°C

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Heat Transfer
Which of the following is not used as a medium for high temperature heating ?

None of the listed here
liquid metal
mercury
dowtherm

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MORE MCQ ON Heat Transfer

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