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Heat Transfer

Heat Transfer
Maximum heat transfer rate is obtained in __________ flow.

Laminar
Turbulent
Creeping
Transition region

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Heat Transfer
1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is

200
500
520
400

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Heat Transfer
For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number)

NPr
NPr-1/3
NPr-1
NPr1/3

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Heat Transfer
The units of resistance to heat transfer is

J.m⁻².K⁻¹
W⁻¹m²K
W.m⁻².K⁻¹
J.m⁻¹.K⁻¹

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Heat Transfer
For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it

Increases the overall heat transfer coefficient
None of these
Decreases the outlet temperature of cooling medium
Decreases the pressure drop

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Heat Transfer
LMTD can't be used as such without a correction factor for the

Multipass heat exchanger
Condensation of mixed vapour in a condenser
All of these
Baffled heat exchanger

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MORE MCQ ON Heat Transfer

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