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Heat Transfer

Heat Transfer
Removal of __________ heat is involved in the condensation of a vapor under saturated conditions.

Super
Both B & C
Sensible
Latent

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Heat Transfer
Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.)

d2
√d
d
d1.5

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Heat Transfer
Overall heat transfer co-efficient for cooling of hydrocarbons by water is about

1000 - 1500 BTU/hr. ft.2°F
50 -100 Kcal/hr.m².°C
50 -100 BTU/hr. ft.2°F
50 -100 W/m² . °K

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Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

4600
3000
4000
9000

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Heat Transfer
Double pipe heat exchangers are preferably useful, when

Requirement of heat transfer area is low
High viscosity liquid is to be cooled
A corrosive liquid is to be heated
Overall heat transfer co-efficient is very high

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Heat Transfer
Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

Basket type
Horizontal tube
None of these
Calendria

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