The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is___________________?

Related Mcqs:

Pick out the correct statement ?

A. 1 kcal/hr.m.°C is equal to 1 BTU/hr. ft.°F B. In steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity C. In unsteady state heat conduction, heat flows in the direction of temperature rise D. In heat transfer by forced convection, Grashoff number is very … Pick out the correct statement ?Read More...

Resistance to heat flow by conduction is proportional to (where, t & ρ are thickness & density of the material respectively and A = area normal to the direction of heat flow.) ?

A. t B. 1/ρ C. 1/A D. All A., B. & C....

Solid angle subtended by the finite surface at the radiating element is_________________?

A. Called the view factor B. Called the angle of vision C. Proportional to the square of the distance between surfaces D. Expressed in terms of radians...

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A. Occupies smaller space B. Is more economical C. Is easy to operate and maintain D. All A., B. and C....

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

A. Tube layout B. Tube diameter C. Tube pitch D. Number of baffles...