Which of the following has maximum thermal conductivity ?

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...

A perfect black body is a perfect _____________ of radiation?

A. Absorber B. Emitter C. Both A. & B. D. Neither A. nor B....

The maximum heat transfer co-efficient from steam heating will be attained when the steam is_________________?

A. Supersaturated B. Saturated C. Wet D. None of these...

Choose the correct equation ?

A. Nu = (Re) (Pr) (Gz) B. Nu = (Re) (Pr) (St) C. Nu = (Re) (Pr) D. Nu = (Pr) (St)...

Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2.°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the_________________?

A. Higher condensing film co-efficient is desired B. Condensate is corrosive in nature C. Lower pressure drop through the exchanger is desired D. Temperature of the incoming vapor is very high...