250+ TOP MCQs on Performance Characteristics of Refrigerant Reciprocating Compressor and Answers

Refrigeration Interview Questions and Answers for Experienced people on “Performance Characteristics of Refrigerant Reciprocating Compressor”.

1. The performance of a refrigerant reciprocating compressor is not measured in terms of its ______________
a) refrigerating capacity
b) brake power per tonne of refrigeration
c) total brake power
d) horse power
Answer: d
Clarification: The performance of a refrigerant reciprocating compressor is not measured in terms of its refrigerating capacity, brake power per tonne of refrigeration and total brake power.

2. Which one of the following is not an important parameter in the design of a refrigerant reciprocating compressor?
a) Evaporator temperature
b) Condenser temperature
c) Suction temperature
d) Compressor temperature
Answer: d
Clarification: The important parameters in the design of a refrigerant reciprocating compressor are the evaporator or suction temperature and condenser temperatures.

3. The refrigeration capacity decreases with the decrease in the evaporator or suction temperature.
a) True
b) False
Answer: a
Clarification:
refrigeration-questions-answers-performance-characteristics-refrigerant-reciprocating-compressor-q3
The refrigeration capacity decreases with the decrease in the evaporator or suction temperature. It is due to the fact that at low suction temperature, the vaporising pressure is low and therefore the density of suction vapor entering the compressor is low. Hence the mass of refrigerant circulated through the compressor per unit time decreases with the decrease in suction temperature for a given displacement.

4. The effect of suction temperature on the compressor B.P. per tonne of refrigeration is?
a) Compressor B.P. per tonne of refrigeration decreases with the increase in suction temperature
b) Compressor B.P. per tonne of refrigeration increases with the increase in suction temperature
c) Compressor B.P. per tonne of refrigeration remains the same with any change in suction temperature
d) Compressor B.P. per tonne of refrigeration decreases with the decrease in suction temperature
Answer: a
Clarification:
refrigeration-questions-answers-performance-characteristics-refrigerant-reciprocating-compressor-q3
The effect of suction temperature on the compressor B.P. per tonne of refrigeration is that the compressor B.P. per tonne of refrigeration decreases with the increase in suction temperature, when the condenser temperature remains the same.

5. The effect of suction temperature on the total B.P. is?
a) To increase the B.P. with the decrease of suction temperature
b) To decrease the B.P. with the decrease of suction temperature
c) That the total B.P. remains unaffected by the changes in suction temperature
d) Can’t say only from the suction temperature
Answer: b
Clarification:
refrigeration-questions-answers-performance-characteristics-refrigerant-reciprocating-compressor-q3
The total B.P. of the compressor is dependent on the work of compression and the mass of refrigerant circulated per minute. Hence the effect of suction temperature on the total B.P. is to increase the B.P. with the decrease of suction temperature.