Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re 0.8. Pr n, is not valid, if the value of __________________?

Related Mcqs:

“The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium”. This is ______________ law?

A. Kirchoff’s B. Planck’s C. Wien’s displacement D. Stefan-Boltzmann...

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A. Heat the water from 0°C to 100°C B. Evaporate the water C. To superheat the steam D. Data insufficient, can’t be predicted...

For _______________ Prandtl number values, the heat conduction will be negligible in the buffer zone?

A. Extremely low B. Low C. High D. No...

Radiation energy is emitted by all the substances, which are above____________________?

A. 0°K B. 0°C C. 100°C D. Room temperature...

Nusselt number is the ratio of the ____________________?

A. Temperature gradient of the wall to that across the entire pipe B. Temperature difference to the temperature gradient at the wall C. Heat flux at the wall to that across the entire pipe D. None of these...