Engineering :: Heat Transfer

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161.

Least value of Prandlt number can be expected in case of

162.

"The boiling point of a solution is a linear function of water at the same pressure". The above statement is associated with

163.

The sensible heat of hot industrial gases can be recovered by a

A.	Regenerator	B.	Recuperator
C.	Either of (A) and (B) above	D.	None of the above

164.

In a shell and tube heat exchanger, the corrosive liquid is normally passed through

A.	Shell side	B.	Tube side
C.	Either of (A) and (B) above	D.	None of the above

165.

The propose of using multiple pass heat exchangers is to

A.	Reduce fluid flow friction losses	B.	Reduce pressure drop
C.	Increase pressure drop	D.	Increase the rate of heat transfer
E.	Neutralise viscous friction

166.

Floating heads are provided in heat exchangers to

A.	Increase the pressure drop	B.	Reduce the pressure drop
C.	Facilitate maintenance	D.	Regulate the flow
E.	Avoid deformation of tubes due to thermal expansion

167.

The first stage of crystal formation is

168.

In heat exchanger design, one transfer unit means

A.	One fluid exchanging with another fluid of the same chemical composition	B.	The section of heat exchanger which will cause temperature drop of one degree centigrade
C.	The section of heat exchanger where heat transfer surface area is one square metre	D.	The equivalent length of tubes in case the heat exchange was for a temperature difference of 1?C
E.	Condition when the change in temperature of 1?C numerically equals the average driving force.

169.

Entrainment separator is used in evaporators to

A.	Increase the boiling point	B.	Reduce the boiling point
C.	Prevent foaming	D.	Separate liquid droplets from vapour
E.	Discharge mud and other impurities

170.

Maximum heat transfer rate can be expected in case of

A.	Turbulent flow	B.	Laminar flow
C.	Co-current flow	D.	Counter current flow
E.	Heat transfer rate is independent of nature of flow