When vaporisation takes place directly at the heating surface, it is called________________?

Related Mcqs:

In a forward feed multiple effect evaporator, the pressure is ____________________?

A. Highest in last effect B. Lowest in last effect C. Same in all effects D. Dependent on the number of effects...

Which of the following has the lowest overall heat transfer co-efficient ?

A. Dowtherm B. Molten sodium C. Water D. Air...

What is the emissivity of a black body ?

A. 0 B. 1 C. 0.5 D. 0.90...

In a cooling tower, water becomes cool by________________?

A. Loosing sensible heat B. Heat transfer to surroundings C. Vaporisation due to heat loss to air D. Loosing latent heat...

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...