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Heat Transfer

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

Light cream
White lead
Grey
Black

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Heat Transfer
In a multiple effect evaporator, the effect of boiling point elevation is to

reduce the economy
all of the listed here
increase the economy
reduce the capacity

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Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

W/m.k²
W/m
W/m.k
None, A is just a number

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Heat Transfer
Which of the following has the minimum thermal conductivity?

Carbon black
Nitrogen
Tar
Steel

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Heat Transfer
In forced convection, the heat transfer depends on

Re, Gr
Re, Pr
mainly Gr
none of the listed here

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Heat Transfer
Open pan evaporators are preferred to be used, when the solution to be concentrated is

Salty
Corrosive
Scaling
Highly viscous

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