Freshers India

Engineering - Mechanical Engineering

You Are Here :: Home > Mechanical Engineering > Refrigeration and Air Conditioning-

37.

In a refrigeration system, heat absorbed in comparison to heat rejected is

A.	more	B.	less
C.	same	D.	more for small capacity and less for high capacity

38.

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

A.	high, of the order of 25°	B.	as low as possible (3 to 11°C)
C.	zero	D.	any value

39.

One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

A.	in 1 hour	B.	in 1 minute
C.	in 24 hours	D.	in 12 hours

40.

An important characteristic of absorption system of refrigeration is

A.	noisy operation	B.	quiet operation
C.	cooling below 0°C	D.	very little power consumption

41.

Formation of frost on evaporator in refrigerator

A.	results in loss of heat due to poor heat transfer	B.	increases heat transfer rate
C.	is immaterial	D.	can be avoided by proper design

42.

If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of - 23°C, then the Carnot COP will be

A.	0.2	B.	1.2
C.	5	D.	6

« prev

Catch Us on