70) In free con-vection heat transfer, Nusselt number is function of
Answer is:
Grashoff no. and Prandtl no.
Related Heat transfer MCQ with Answers
Answer is:
radiation
Explanation:
Stefan Boltzmann law is applicable for heat transfer by radiation. According to Stefan's law, the total radiation from a black body per second per unit area is directly proportional to the fourth power of the absolute temperature.
Answer is:
more than those for liquids and gases
Answer is:
all of the above
Explanation:
Thermal diffusivity of a substance is
* directly proportional to the thermal conductivity
* inversely proportional to density of substance
* inversely proportional to specific heat