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Heat Transfer

Heat Transfer
Temperature profile in steady state heat transfer is

Linear
hyperbolic
parabolic
none of the listed here

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Heat Transfer
In a cooling tower, water becomes cool by

Loosing latent heat
Vaporisation due to heat loss to air
Heat transfer to surroundings
Loosing sensible heat

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Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

333W/m².K
1200W/m².K
287 W/m².K
894W/m².K

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Heat Transfer
Radiator of an automobile engine is a __________ type of heat exchanger.

Direct contact
Counter-current
Cross-current
Co-current

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Heat Transfer
Agitated film evaporator is suitable for concentrating __________ liquids.

Viscous
Foaming
Corrosive
Very thin

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Heat Transfer
Corrosiveness of steam condensate is due to the presence of

Neither A nor B
Dissolved O₂
CO₂
Both A & B

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