Heat Transfer Multiple Choice Questions on Condensation and Boiling

Boiling refers to a change from the

The boiling process has wide-spread applications in (i) Production of steam in nuclear and steam power plants for generation and for industrial processes and space heating (ii) Absorption of heat in refrigeration and air-conditioning systems (iii) Concentration, dehydration and drying of foods and materials Identify the correct statements

Maximum heat transfer rate in a modern boiler is about

Which type of boiling occurs in steam boilers employing natural convection?

In which type of boiling the fluid motion is induced by external means?

The temperature of the liquid is below the saturation temperature and boiling takes place only in vicinity of the heated surface. This type of boiling is known as

In which type of boiling the temperature of the liquid exceeds the saturation temperature?

The phenomenon of stable film boiling is referred to as

For water evaporating at atmospheric pressure, the burnout occurs at temperature excess slightly above

The boiling phenomenon is known to occur in how many forms?

Condensation refers to a change from the

Condensation process is very common in (i) Boilers (ii) Condensers (iii) Evaporators Identify the correct statements

The convective coefficients for condensation usually lie in the range

Drop wise condensation usually occurs on

Depending upon the behavior of condensate up on the cooled surface, the condensation process are classified into how many distinct modes?