MCQs of Refrigerant and Refrigeration Cycles (Applied Thermodynamics - 3161910)

Showing 31 to 40 out of 65 Questions

31.

In the vapour compression refrigeration system, the condition of refrigerant is dry & saturated vapour

(a)	after passing through the condenser
(b)	before passing through the condenser
(c)	before entering the compressor
(d)	after passing through the expansion valve

32.

The higher temperature in the vapour compression cycle occurs at

33.

The short horizontal line on the pressure-enthalpy chart show

(a)	constant pressure lines
(b)	constant temperature lines
(c)	constant specific volume lines
(d)	constant entropy lines

34.

The purpose of installing a flash chamber in the refrigeration circuit is to

(a)	improve overall heat transfer coefficient
(b)	reduce pressure losses through the evaporator
(c)	reduce the size of the evaporator by avoiding vapours going to the evaporator
(d)	all of the above

35.

For obtaining high COP, the pressure range of compressor should be

36.

In a refrigeration cycle, heat is rejected by the refrigerant in a

37.

The subcooling is a process of cooling the refrigerant in VCR system

38.

The process of undercooling is generally brought about by

(a)	circulating more quantity of cooling water through the condenser
(b)	using water colder than the main circulating water
(c)	employing a heat exchanger
(d)	any of the above

39.

Which system is used to maintain different temperatures at different points,

40.

Ammonia-absorption refrigeration cycle requires

(a)	very little work input
(b)	maximum work input
(c)	nearly same work input as for vapour compression cycle
(d)	zero work input

Showing 31 to 40 out of 65 Questions