Heat & Mass Transfer MCQ Question with Answer

Question No : 29
Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of

Question No : 30
The transfer of heat by molecular collision is known as

Question No : 31
Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by

Question No : 32
The heat of sun reaches to us according to

Question No : 33
Stefan Boltzmann law is applicable for heat transfer by

Question No : 34
The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit

Question No : 35
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as