HEAT TRANSFER QUIZ

True temperature drop increases

Both B and C

Capacity of the evaporator is decreased

Capacity of the evaporator is increased

Kcal/hr. °C

Kcal/hr.m.°C

Kcal/hr. m² °C

Kcal/hr.m

Planck's

Stefan-Boltzman

Kirchoffs

Wien's displacement

Very large vapour space is necessary

Temperature of the heating surface is more than the boiling point of the liquid

Temperature of the heating surface is less than the boiling point of the liquid

Bubbles from heating surface are absorbed by the mass of the liquid

Never different

Linearly related

Same

Different

surface area and temperature of the heat source

none of the listed here

distance between the heat source and the object receiving the heat

type of absorbing surface

Only parallel-flow of fluids

Both counter and parallel-flow of the fluids

Only counter-flow of fluids

Smaller pressure drop compared to 1-2 exchanger

Increases

Decreases

Remains unchanged

Increases or decreases depending on number of shell passes

4.88 kcal/hr. m.2°C

1 kcal/hr. m².°K

1 kcal/hr. m²°C

None of these

0.025

5.6

3.5

0.0035