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Heat Transfer

Heat Transfer
The unit of heat transfer co-efficient in SI unit is

W/m°K
J/M2°K
W/m2°K
J/m°K

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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

Conduction
Radiation
Natural convection
Forced convection

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Heat Transfer
The Stefan-Boltzman constant depends on the

Surface
Medium
None of these
Temperature

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Heat Transfer
The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid

Decrease in heat exchanger efficiency
Excessive corrosion
Uneconomic LMTD
Its evaporation loss

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Heat Transfer
Air is best heated with steam in a heat exchanger of

double pipe type with fin on steam side
shell and tube type
double pipe type with fin on air side
plate type

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Heat Transfer
Correction is applied to LMTD for __________ flow.

Parallel
None of these
Cross
Counter

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