A. Bell-coleman
B. Air cooling cycle
C. Carnot cycle
D. Raynold cycle
Ans -: A
Q.2. Fluid ____ heat while changing from a liquid phase to vapour phase .
A. Remove
B. Convert
C. Absorb
D. Increase
Ans -: C
Q.3 What is the boiling temperature of carbon dioxide?
A. 31° C
B. 78.5 ° C
C. - 78.5 ° C
D. -48.5 ° C
Ans -: C
Q.4 What is the boiling temperature of ammonia?
A. - 33° C
B. - 45° C
C. 75 ° C
D. 22.5 ° C
Ans-: A
Q.5 Operating pressure of Freon- 12 is ____ .
A. 5 kgf/cm^2
B. 8 kgf/cm^2
C. 10 kgf/cm^2
D. 22 kgf/cm^2
Ans -: B
Q.6 Sulphur dioxide ( SO2 ) has low working pressure _____ .
A. 5.5 kgf/cm^2
B. 7.5 kgf/cm^2
C. 4.5 kgf/cm^2
D. 1.8 kgf/cm^2
Ans -: C
Q.7 As compared to Freon-12 , freon-22 has _____.
A. High specific volume
B. Low specific volume
C. Equal specific volume
D. None of these
Ans -: B
Q.8 Freon-12 is mostly used in which type of plants?
A. Commercial
B. Domestic
C. Never used
D. A + B
Ans-: B
Q.9 Sulphur dioxide has a critical temperature of ______ .
A. 157.2 ° C
B. 225.5 ° C
C. 100 ° C
D. 127.5 ° C
Ans-: A
Q.10 What happed , when SO2 contact with moisture?
A. Highly toxic
B. Corrosive
C. Non- corrosive
D. A + B
Ans-: D
Q.11 Carbon dioxide has critical temperature in the order of _____ .
A. 52 ° C
B. 25 ° C
C. 31 ° C
D. 125 ° C
Ans -: C
Q.12 Ammonia is mostly used in ____ .
A. Domestic purpose
B. Large commercial installation
C. A + B
D. None of the above
Ans-: B
Q.13 The ratio of the refrigeration obtained to the net work done on the system in the cycle known as _____ .
A. Refrigeration ratio
B. Work done
C. Coefficient of performance of refrigerant
D. Refrgerant quality
Ans-: C
Q.14 Compression refrigeration system also known as _____ .
A. Flood refrigeration system
B. Mechanical refrigeration system
C. Dry refrigeration system
D. None of these
Ans -: B
Q. 15 The ratio of actual and theoretical coefficient of performance is known as ____ .
A. Relative Coefficient of performance
B. Refrigeration C.O.P.
C. Total work done
D. None of these
Ans -: A
No comments:
Post a Comment