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Heat Transfer

Heat Transfer
(NRe.NPr)(D/L) is called the __________ number

Stanton
Graetz
Peclet
None of these

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Heat Transfer
What is the geometric mean of two heat transfer areas A₁ and A₂ ?

2 √(A₁ . A₂)
√(A₁ . A₂)
√(A₁ + A₂)
1/2 √(A₁ . A₂)

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Heat Transfer
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

Hardness
Suspended solids content
Dissolved soilds content
All of these

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Heat Transfer
Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats

P and R
P and S
R and S
P and Q

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

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

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Heat Transfer
__________ paint has the minimum absorption co-efficient.

Light cream
White lead
Black
Grey

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