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HEAT TRANSFER

Heat Transfer
Presence of a non-condensing gas in a condensing vapour

increases the rate of condensation
is desirable to increase the film co-efficient
decreases thermal resistance
None of the listed here

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Heat Transfer
In a heat exchanger, floating head is provided to

increase log mean temperature gradient
facilitate cleaning of the exchanger
increase the heat transfer area
relieve stresses caused by thermal expansion

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Heat Transfer
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is

I2R
None of the listed here
IR
IR2

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Heat Transfer
Kirchoff s law applies to __________ radiation

monochromatic
None of the listed here
Both total & monochromatic
total

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Heat Transfer
In case of evaporators, liquid entrainment results primarily due to

high heat transfer rate
foaming of the solution
high heat transfer rate
high vacuum in the evaporator

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