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Heat Transfer

Heat Transfer
Mechanical recompression evaporation is used in the production of

Salt
Distilled water
Fruits jam
Alcohol

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Heat Transfer
Correction is applied to LMTD for __________ flow.

Counter
None of these
Parallel
Cross

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Heat Transfer
Reason for operating an evaporator in multiple effect is to secure

Both A and B
Decreased steam consumption
Increased steam economy
Increased capacity

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Heat Transfer
For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is

Nu = 0.023 Re0.8 . Pr0.4
Nu = Gz
Nu = Gz
Nu = 2Gz0.5

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Heat Transfer
In a backward feed multiple effect evaporator

Feed is introduced in the first effect
None of these
Feed flows from low pressure to high pressure
No pumps are required between successive effects

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Heat Transfer
A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires

Less heating surface
None of these
Lower maintenance cost
More space

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MORE MCQ ON Heat Transfer

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