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Heat Transfer

Heat Transfer
1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C.

1
4.88
1.49
None of these

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Heat Transfer
Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the

High heat transfer co-efficient
Less corrosion problems
Low pressure drop
Flexibility possible in the baffle arrangement

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Heat Transfer
For a multipass shell and tube heat exchanger, the LMTD correction factor is always

1
> 1
Between 1 & 2
< 1

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Heat Transfer
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Is same as
Half
Greater than
Lower than

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Heat Transfer
Harmonic mean temperature difference is given by

(ΔT₁ - ΔT₂)/(ΔT₁ . ΔT₂)
2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂)
√(ΔT₁ . ΔT₂)
2.(ΔT₁ . ΔT₂)/(ΔT₁ + ΔT₂)

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Heat Transfer
Steam economy in case of a triple effect evaporator will be

< 1
Between 0 and 1
> 1
1

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