The concept of overall coefficient of heat transfer is used in case of heat transfer by________________?

Related Mcqs:

Heat is closely related with___________________?

A. liquids B. energy C. temperature D. entropy E. enthalpy...

The time constant of a thermocouple is_______________?

A. the time taken to attain the final temperature to be measured B. the time taken to attain 50% of the value of initial temperature difference C. the time taken to attain 63.2% of the value of initial temperature difference D. determined by the time taken to reach 100°C from 0°C E. none of the … The time constant of a thermocouple is_______________?Read More...

Thermal conductivity of wood depends on_______________?

A. moisture B. density C. temperature D. all of the above E. none of the above...

In free con-vection heat transfer, Nusselt number is function of________________?

A. Grashoff no. and Reynold no B. Grashoff no and Prandtl no. C. Prandtl no. and Reynold no D. Grashoff no., Prandtl no and Reynold no E. none of the above...

Absorptivity of a body will be equal to its emissivity___________________?

A. at all temperatures B. at one particular temperature C. when system is under thermal equi-librium D. at critical temperature E. for a polished body...