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Heat Transfer

Heat Transfer
1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C.

1
4.88
1.49
None of these

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Heat Transfer
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

Nusselt
Stanton
Prandtl
Grashoff

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Heat Transfer
In pipe flow, heat is transferred from hot wall to the liquid by

Forced convection and conduction
Forced convection only
Conduction only
Free and forced convection

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Heat Transfer
Heat flux is the time rate of heat transfer per unit

none of the listed here
length
area
volume

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Heat Transfer
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?

Catchall
Bleed point
Vent
None of the listed here

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Heat Transfer
Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called

Radiation
Conduction
Natural convection
Forced convection

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