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Heat Transfer

Heat Transfer
Fourier's law applies to the heat transfer by

None of the listed here
convection
conduction
radiation

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Heat Transfer
The main purpose of providing fins on heat transfer surface is to increase the

Mechanical strength of the equipment
Heat transfer co-efficient
Heat transfer area
Temperature gradient

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Heat Transfer
Viscosity of gases __________ with increase in temperature.

Remain unaffected
Increase slowly
Decrease slowly
Increase very rapidly

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Heat Transfer
Duhring rule is important in solving problems on

Evaporation
Distillation
Crystallisation
Humidification

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Heat Transfer
The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is

Higher tube side heat transfer co-efficient
Lower tube side pressure drop
Higher shell side heat transfer co-efficient
Lower shell side pressure drop

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Heat Transfer
In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will

Increase
Decrease
Remain unchanged
Either increase or decrease; depends on the coolant flow rate

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