Heat Transfer MCQs

Condensation of the saturated vapor on a cold surface

Concentration of a corrosive solution by evaporation

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

Decreases the pressure drop

Decreases the outlet temperature of cooling medium

Increases the overall heat transfer coefficient

None of these

0.5

1

0

2

For fluids in laminar flow

For fluids in tubulent flow

When Grashhoff number is very important

For liquid metals

0.5

< 0.5

> 0.6

< 0.1

Liquid density

Liquid viscosity

Hot surface temperature

Interfacial tension

Low density

High viscosity

Partial ionisation

Dense structure

U₁ – U₂

1/U₁ – 1/U₂

1/U₂ – 1/U₁

U₂ – U₁

Smaller than

Greater than

Equal to

Not related with

C/E

E/C

CE

1/CE