MCQs of Heat Exchangers (Heat Transfer - 3151909)

Heat Transfer (3151909) MCQs

MCQs of Heat Exchangers

Showing 21 to 30 out of 32 Questions

21.

Evaporators in ice plant is an example of

(a)	regenerator type heat exchangers
(b)	recuperative type heat exchangers
(c)	open type heat exchangers
(d)	combination of the regenerator and recuperative type heat exchangers

22.

In a balance counter-flow heat exchanger with ${\dot{m}}_{h} c_{h} = {\dot{m}}_{c} c_{c}$ , the NTU is equal to unity. What is the effectiveness of heat exchanger?

(a)	0.5
(b)	1.5
(c)	0.33
(d)	0.2

23.

Fouling factor is used

(a)	in heat exchanger design as a safety factor
(b)	in case of Newtonian fluids
(c)	when a liquid exchanges heat with a gas
(d)	none of these

24.

In a shell and tube heat exchanger, baffles are provided on the shell side to

(a)	improve heat transfer
(b)	provide support for tubes
(c)	prevent stagnation of shell side fluid
(d)	all of these

25.

Size of heat exchangers could be compared by

(a)	LMTD
(b)	ZMTD
(c)	NTU
(d)	Both ZMTD and NTU

26.

The ratio of actual heat transfer to the maximum possible heat transfer is called

(a)	efficiency of heat exchanger
(b)	effectiveness of heat exchanger
(c)	performance index of heat exchanger
(d)	none of these

27.

The mathematical range of capacity ratio is

(a)	0 to 1
(b)	-1 to 1
(c)	1 to infinity
(d)	0 to infinity

28.

Maximum effectiveness of a parallel flow heat exchanger could be

(a)	0.5
(b)	1
(c)	0.65
(d)	0.8

29.

Maximum effectiveness of a counter flow heat exchanger could be

(a)	0.5
(b)	1
(c)	0.65
(d)	0.8

30.

If a heat exchanger LMTD is zero then heat transfer surface become

(a)	maximum
(b)	minimum
(c)	infinity
(d)	moderate

Showing 21 to 30 out of 32 Questions