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Heat Transfer

Heat Transfer
(Cp . μ)/K is termed as the __________ number.

Stanton
Nusselt
Grashoff
Prandtl

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Heat Transfer
Prandtl number is the reciprocal of

Thermal diffusivity x Momentum
Thermal diffusivity/Momentum diffusivity
Mass diffusivity x Momentum diffusivity
Thermal diffusivity x Mass diffusivity

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Heat Transfer
Graetz number is given by

kL/mCp
mCp/kμ
mCp/kL
kμ/mCp

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Heat Transfer
An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a

regenerator
recuperator
heat exchanger
boiler

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Heat Transfer
In a heat exchanger, floating head is provided to

increase log mean temperature gradient
facilitate cleaning of the exchanger
relieve stresses caused by thermal expansion
increase the heat transfer area

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Heat Transfer
The actual temperature drop across the heating surface of an evaporator depends on the

All of these
Solution being evaporated
Liquid depth over the heating surface
Pressure difference between the steam chest and the vapor space above the boiling liquid

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