A. temperature, pressure and enthalpy
B. specific volume and enthalpy
C. temperature and enthalpy
D. temperature, pressure, and specil volume
E. temperature, pressure, specific volur and’enthalpy
Related Mcqs:
- Clapeyron equation is applicable for registration at___________________?
A. saturation point of vapor
B. saturation point of liquid
C. sublimation temperature
D. triple point
E. critical point - The boiling point of ammonia is___________________?
A. -100°C
B. -50°C
C. – 33.3°C
D. 0°C
E. 33.3°C - One ton refrigeratiqn corresponds to_________________?
A. 50 kcal/min
B. 50 kcal/kr
C. 80 kcal/min
D. 80 kcal/hr
E. 1000 kcal/day - The domestic refrigerator uses following type of compressor ____________________?
A. centrifugal
B. axial
C. miniature sealed unit
D. piston type reciprocating
E. none of the above - Condensing temperature in a refrigerator is the temperature_________________?
A. of cooling medium
B. of freezing zone
C. of evaporator
D. at which refrigerant gas becomes liquid
E. condensing temperature of ice - Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________?
A. 1.25
B. 0.8
C. 0.5
D. 0.25
E. none of the above - For obtaining high COP, the pressure range of compressor should be_______________?
A. high
B. low
C. optimum
D. any value
E. there is no such criterion - The coefficient of performance is the ratio of the refrigerant effect to the_________________?
A. heat of compression
B. work done by compressor
C. enthalpy increase in compressor
D. all of the above
E. none of the above - Ammonia is __________________?
A. non-toxic
B. non-inflammable
C. toxic and non-inflammable
D. highly toxic and inflammable
E. none of the above - One of the purposes of sub-cooling the liquid refrigerant is to________________?
A. reduce compressor overheating
B. reduce compressor discharge temperature
C. increase cooling effect
D. ensure that only liquid and not the vapour enters the expansion (throttling) valve
E. none of the above
