HEAT AND MASS TRANSFER QUIZ

All of these

Type of surface of body

Nature of body

Temperature of body

All of these

Moisture

Temperature

Density

Water

Glass

Plastic

Air

Condensers and boilers in steam plants

Condensers and evaporators in refrigeration and air conditioning units

Radiators in automobile

All of these

Do not move actually

Does not affect the intervening medium

Affect the intervening medium

Move actually

h₀/2k

2k/h₀

h₀/k

k/h₀

Physical property of a substance

Function of temperature

Dimensionless parameter

All of these

P = 0, x = 0 and a = 1

P = 0, x = 1 and a = 0

P=1, x = 0 and a = 0

X = 0, a + p = 1

°C (temperature)

Hr (time)

K.cal (heat)

Sq. m (area)

Emissive power depends on temperature

Radiant heat is proportional to fourth power of absolute temperature

Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body

Emissive power and absorptivity are constant for all bodies