TOP Refrigeration and Air Conditioning Engineering Multiple choice Questions and Answers pdf

11. In vapour compression cycle, the condition of refrigerant is very wet vapour
(a)    after passing through the condenser
(b)    before passing through the condenser
(c)    after passing through the expansion or throttle valve
(d)    before entering the expansion valve
(e)    before entering the compressor.
Ans: e

12. In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid
(a)    after passing through the condenser
(b)    before passing through the condenser
(c)    after passing through the expansion or throttle valve
(d)    before entering the expansion valve
(e)    before entering the compressor.
Ans: d

13. In vapour compression cycle the condition of refrigerant is superheated vapour
(a)    after passing through the condenser
(b)    before passing through the condenser
(c)    after passing through the expansion or throttle valve
(d)    before [entering the expansion valve
(e)    before entering the compressor.
Ans: b

14. In vapour compression cycle the condition off refrigerant is dry saturated vapour
(a)    after passing through the condenser
(b)    before passing through the condenser
(c)    after passing through the expansion or throttle valve
(d)    before entering the expansion valve
(e)    before entering the compressor..
Ans: e

15.  The boiling point of ammonia is
(a)    -100°C 
(b)    -50°C
(c)    - 33.3°C 
(d)     0°C
(e)     33.3°C.
Ans: c

16.   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
(e)     in 10 hours.
Ans: c

17.  One ton refrigeration corresponds to
(a)     50 kcal/min   
(b)     50 kcal/kr
(c)     80 kcal/min   
(d)     80 kcal/hr
(e)     1000 kcal/day.
Ans: a

18. In S.J. unit, one ton of refrigeration is equal to
(a)     210 kJ/min    
(b)     21 kJ/min
(c)     420 kJ/min    
(d)     840 kJ/min
(e)     105 kJ/min.
Ans: a

19.    The vapour compression refrigerator employs the following cycle
(a)     Rankine 
(b)     Carnot
(c)    Reversed Rankine
(d)    Brayton 
(e)     Reversed Carnot.
Ans: e

20.    Allowable pressure on high-pressure side or ammonia absorption system is of the order of
(a)    atmospheric pressure
(b)    slightly above atmospheric pressure
(c)    2-4 bars 
(d)     5-6 bars
(e)    7-10 bars.
Ans: d

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