HEAT AND MASS TRANSFER QUIZ

Reynold's number

Prandtl number, Grashoff's number

Reynold's number, Grashoff's number

Grashoff's number

Radiation

Forced convection

Free convection

Conduction

Inversely proportional to specific heat

Directly proportional to the thermal conductivity

Inversely proportional to density of substance

All of these

66.7°C

60°C

40°C

20°C

Better 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

Both may be put in any order

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

All of these

In radiation, increasing the temperature and reducing the emissivity.

In convection, stirring of the fluid and cleaning the heating surface.

In conduction, reduction in the thickness of the material and an increase in thermal conductivity.

Water coolers

Domestic refrigerators

Room air conditioners

All of these

Convective heat loss will be less than conductive heat loss

Heat flux will decrease

Added insulation will increase heat loss

Added insulation will decrease heat loss

Convection

Radiation

Conduction and convection

Conduction

Temperature

Energy

Entropy

Liquids