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Heat Transfer

Heat Transfer
Peclet number (Pe) is given by

Pe = Re.Pr
Pe = Nu.Re
Pe = Pr/Re
Pe = Re/Pr

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Heat Transfer
Nusselt number (for forced convection heat transfer) is a function of the __________ number.

Both Reynolds & Prandtl
None of the listed here
Reynolds
Prandtl

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Heat Transfer
Analogy between mass and heat transfer is not applicable in case of

Thermal or pressure mass diffusion
Same velocity profile or equal eddy diffusivities
Viscous heating or chemical reaction
Both B and C

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

Direct contact
Co-current
Counter-current
Cross-current

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Heat Transfer
Multiple effect evaporation accounts for

None of these
Investment economy
Lower operating costs
Steam economy

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Heat Transfer
In a cooling tower, water becomes cool by

Loosing sensible heat
Loosing latent heat
Vaporisation due to heat loss to air
Heat transfer to surroundings

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