CIRO TEST |ACTUAL QUESTIONS AND VERIFIED
ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
What is the purpose of the refrigeration compressor?
A. To draw vapor away from the evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed.
B. To superheat the refrigerant gas that is drawn from the evaporator to ensure it is not
condensed prior to entering the condenser.
C. To move vaporized refrigerant from the high side to the low side at the same rate is is
being generated and to raise the pressure of that vapor to a point where it can be
condensed.
D. To provide hot gas to allow for more efficient hot gas defrost.
CORRECT ANSWER
A. To draw vapor away from evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed.
Question 2
How does the refrigeration compressor maintain the temperature in the system
evaporators?
A. Drawing out vaporized refrigerant at a rate to maintain the desired evaporating pressure
B. Increasing pressure
C. By using liquid injection or thermo-siphon cooling
D. Compressors do not maintain evaporator temperatures.
CORRECT ANSWER
1
@THE STUDY VAULT
, A. Drawing out vaporized refrigerant at a rate to maintain the desired evaporating
pressure
Question 3
Discharge vapor from all compressors...
A. Must go directly to a condenser
B. Will contain some level of superheat
C. Must be monitored to ensure it does not condense
D. May be supercooled to improve efficiency
CORRECT ANSWER
B. Will contain some level of superheat
Question 4
What is the basic idea behind the design of the hermetic compressor?
A. To avoid buying two separate pieces of equipment
B. To avoid slugging
C. To avoid allowing refrigerant to escape to atmosphere from seals leaking
D. To avoid allowing air into the system if seals leak
CORRECT ANSWER
C. To avoid allowing refrigerant to escape to atmosphere from seals leaking
Question 5
2
@THE STUDY VAULT
, What is one reason discharge temperatures are lower on screw compressors than on
reciprocating compressors?
A. Use glycol cooling to minimize discharge temperatures
B. Uses water cooling to minimize discharge temperatures
C. Uses air cooling to minimize discharge temperatures
D. Uses lubricating oil through the compression chamber
CORRECT ANSWER
D. Uses lubricating oil through the compression chamber
Question 6
Double acting reciprocating compressors...
A. Compress the same gas twice with each stroke of the piston
B. Compress vapor on the fore stroke and the back stroke
C. Provide two stage compression with higher efficiency than separate compressors
D. Are compressors that can be used for either low stage or high stage operations
CORRECT ANSWER
B. Compress vapor on the fore stroke and the back stroke
Question 7
How can pumping capacity be increased by smaller reciprocating vs. older and larger
compressors?
A. By increasing rpm and the number of cylinders
B. By increasing motor horsepower
3
@THE STUDY VAULT
ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
What is the purpose of the refrigeration compressor?
A. To draw vapor away from the evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed.
B. To superheat the refrigerant gas that is drawn from the evaporator to ensure it is not
condensed prior to entering the condenser.
C. To move vaporized refrigerant from the high side to the low side at the same rate is is
being generated and to raise the pressure of that vapor to a point where it can be
condensed.
D. To provide hot gas to allow for more efficient hot gas defrost.
CORRECT ANSWER
A. To draw vapor away from evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed.
Question 2
How does the refrigeration compressor maintain the temperature in the system
evaporators?
A. Drawing out vaporized refrigerant at a rate to maintain the desired evaporating pressure
B. Increasing pressure
C. By using liquid injection or thermo-siphon cooling
D. Compressors do not maintain evaporator temperatures.
CORRECT ANSWER
1
@THE STUDY VAULT
, A. Drawing out vaporized refrigerant at a rate to maintain the desired evaporating
pressure
Question 3
Discharge vapor from all compressors...
A. Must go directly to a condenser
B. Will contain some level of superheat
C. Must be monitored to ensure it does not condense
D. May be supercooled to improve efficiency
CORRECT ANSWER
B. Will contain some level of superheat
Question 4
What is the basic idea behind the design of the hermetic compressor?
A. To avoid buying two separate pieces of equipment
B. To avoid slugging
C. To avoid allowing refrigerant to escape to atmosphere from seals leaking
D. To avoid allowing air into the system if seals leak
CORRECT ANSWER
C. To avoid allowing refrigerant to escape to atmosphere from seals leaking
Question 5
2
@THE STUDY VAULT
, What is one reason discharge temperatures are lower on screw compressors than on
reciprocating compressors?
A. Use glycol cooling to minimize discharge temperatures
B. Uses water cooling to minimize discharge temperatures
C. Uses air cooling to minimize discharge temperatures
D. Uses lubricating oil through the compression chamber
CORRECT ANSWER
D. Uses lubricating oil through the compression chamber
Question 6
Double acting reciprocating compressors...
A. Compress the same gas twice with each stroke of the piston
B. Compress vapor on the fore stroke and the back stroke
C. Provide two stage compression with higher efficiency than separate compressors
D. Are compressors that can be used for either low stage or high stage operations
CORRECT ANSWER
B. Compress vapor on the fore stroke and the back stroke
Question 7
How can pumping capacity be increased by smaller reciprocating vs. older and larger
compressors?
A. By increasing rpm and the number of cylinders
B. By increasing motor horsepower
3
@THE STUDY VAULT
