HEAT TRANSFER QUIZ

Solids

Both solids & liquids

Gases

Liquids

Increases rapidly with temperature rise

In independent of pressure

Both B and C

Decreases rapidly with temperature rise

Counter

None of these

Parallel

Cross

None of the listed here

monochromatic

Both total & monochromatic

total

The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant

Both will absorb equal amount of radiation from the surrounding in the beginning

Both B & C

Both the spheres will emit equal amount of radiation per unit time in the beginning

are used for smaller heat load

use metal fins of low thermal conductivity

facilitate very large temperature drop through tube wall

give larger area per tube

500

200

520

400

greater than

smaller than

equal to

None of the listed here

Hyperbolic

Linear

Logarithmic

Parabolic

continues to decrease

continues to increase

goes through a minimum

goes through a maximum.