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Heat Transfer

Heat Transfer
Reynold's analogy states that

Nst α NRe
NNu α f
NRe α f
Nst α f

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Heat Transfer
If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will

Decrease by 22
Increase by 216
Increase by 1.8 times
Remain unchanged

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Heat Transfer
Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping

The top tube sheet floating and bottom tube sheet fixed
Both the tube sheets fixed
The top tube sheet fixed and the bottom tube-sheet floating
Both the tube sheets floating

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Heat Transfer
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

KA/x
X/KA
K/Ax
A/Kx

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Heat Transfer
A dephlegmator is a

Vacuum evaporator
Double pipe heat exchanger
Partial condenser
Total condenser

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

Co-current
Direct contact
Counter-current
Cross-current

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MORE MCQ ON Heat Transfer

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