HEAT AND MASS TRANSFER QUIZ

Inferior insulation should be put over pipe and better one over it

Whether to put inferior OIL over pipe or the better one would depend on steam temperature

Better insulation should be put over pipe and better one over it

Both may be put in any order

Varies with temperature

Is equal to its emissivity

Does not vary with temperature and. wavelength of the incident ray

Varies with wavelength of the incident ray

Grashoff number and Prandtl number

Prandtl number and Reynold number

Grashoff number and Reynold number

Grashoff number, Prandtl number and Reynold number

A vapour seal

High thickness of insulation

Less thermal conductivity insulator

High vapour pressure

K.cal (heat)

°C (temperature)

Hr (time)

Sq. m (area)

Equal to one

Equal to Nusselt number

Greater than one

Less than one

Plastic

Water

Glass

Air

Absorptivity

Absorptive power

Emissive power

Emissivity

P = 0, x= 1, and a = 0

X = 0, a + p = 1

P = 0, x = 0 and a = 1

P=1, x = 0, and a = 0

0.3

0.7

0.1

1.7