Heat Transfer MCQs

Momentum diffusivity to mass diffusivity

Momentum diffusivity to thermal diffusivity

Thermal diffusivity to mass diffusivity

Thermal diffusivity to momentum diffusivity

Only counter-flow of fluids

Only parallel-flow of fluids

Both counter and parallel-flow of the fluids

Smaller pressure drop compared to 1-2 exchanger

1

< 1

> 1

> 5

Steam ejector

Entrainment separator

Compressor

Vacuum pump

Basket type

Horizontal

Long tube vertical

None of these

Increases the rate of condensation

Decreases thermal resistance

Is desirable to increase the film co-efficient

None of these

Single effect evaporator

Single effect evaporator followed by a crystalliser

Multiple effect evaporator

Multiple effect evaporators followed by a crystalliser

1 and 0

0 and 1

1 and ?

0 and 0.5

Fouling factor

Heat transfer area

Heat transfer co-efficient

Heat transfer rate

A section of the exchanger in which change in temperature of one stream equals the average driving force in the section

The size of the exchanger in which heat transfer rate is 1 kcal/hr

Both A and B

None of these