Test: Heat Transfer - 4 - Mechanical Engineering MCQ

Use of transverse baffles in a shell and tube heat exchanger is done to increase the

Economy of a multiple effect evaporator depends upon the

The Graetz number is concerned with the

Solid angle subtended by the finite surface at the radiating element is

Pick out the wrong statement.

In forced convection, the heat transfer depends on

With increase in temperature, the thermal conductivity of most liquids

Heat transfer by __________ may not necessarily require the presence of a medium.

Pick out the correct statement.

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used

Stefan-Boltzman law applies to __________ body.

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

Heat transfer by __________ may not necessarily require the presence of a medium.

A perfect black body is a perfect __________ of radiation.

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

The non-dimensional temperature gradient in a liquid at the wall of a pipe is the

An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a

Which of the following is directly concerned with the heat transfer ?

Pick out the wrong statement:

Planck's distribution law is valid for __________ bodies.

Radiation energy is emitted by all the substances, which are above

For hot feed, forward feeding as compared to backward feeding results in __________ economy.