A. collect liquid refrigerant and prevent it from going to compressor
B. detect liquid in vapour
C. superheat the vapour
D. collect vapours
E. increase refrigeration effect
Related Mcqs:
- The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is_________________?
A. same
B. more
C. less
D. more or less depending on ambient conditions
E. unpredictable - The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is_________________?
A. bigger
B. smaller
C. equal
D. smaller/bigger depending on capacity
E. unpredictable - 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 - For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?
A. small
B. high
C. euqal
D. anything
E. under some conditions small and under some conditions high - 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
E. decreases compressor power - If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be________________?
A. same
B. more
C. less
D. more/less depending on rating
E. unpredictable - Reducing suction pressure in refrigeration cycle_________________?
A. lowers evaporation temperature
B. increases power required per ton of refrigeration
C. lowers compressor capacity because vapour is lighter
D. reduces weight displaced by piston
E. all of the above - A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?
A. Ammonia
B. Carbon dioxide
C. Freon
D. Brine
E. Hydrocarbon refrigerant - Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?
A. electrically operated throttling valve
B. manually operated valve
C. thermostatic valve
D. capillary tube
E. expansion valve. - 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
