GCAP OPERATOR 1 EXAM- LATEST 2026 UPDATED QUESTIONS
AND VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
What is the direction of flow through every condenser?
A) Refrigerant enters at the bottom, leaves at the bottom
B) Refrigerant enters at the top, leaves at the top
C) Refrigerant enters at the top, leaves at the bottom
D) Refrigerant enters at the bottom, leaves at the top - Answers -C) Refrigerant enters at the top
and leaves at the bottom
Can wet bulb temperature affect the efficiency of an evaporative cooled condenser? (Yes or No)
- Answers -Yes
What conditions are associated with high head pressure?
A) Excessive energy used and compressor wear
B) Lower evaporator temperatures
C) Lower oil pressure
D) Higher efficiency - Answers -A) Excessive energy used and compressor wear
Head pressure is 162 PSIG, and condenser liquid drain temperature is 84°F. What could head
pressure be reduced to with proper purging?
A) 162 PSIG
B) 149 PSIG
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,C) 155 PSIG
D) 188 PSIG - Answers -B) 149 PSIG
(84°F SAT = 149 PSIG)
In order to convert 1 pound of saturated NH3 liquid to saturated NH3 gas, approximately how
much heat must be absorbed into the liquid at SAT conditions?
A) 561 BTU's
B) 144 BTU's
C) 970 BTU's
D) 1 BTU - Answers -A) 561 BTU's
A refrigerant line contains Ammonia at the following conditions: 80°F, 120 PSIG
What is the state of the refrigerant in the line?
A) The line contains SAT liquid
B) The line contains sub-cooled liquid
C) The line contains a mixture of liquid and vapor at SAT conditions
D) The line contains vapor - Answers -D) The line contains vapor
100°C is equal to?
A) 100°F
B) 212°F
C) 175°F
D) 200°F - Answers -°F = (°C x 1.8) + 32
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,°F = (100 x 1.8) + 32
°F = 212
Copper tubing is never used with?
A) HCFC 22
B) R-717
C) HCFC 134a
D) Any refrigerant - Answers -R-717 / NH3 / Ammonia
A compressor is properly matched with a drive motor on a system that works at -10°F
evaporating temperature. If the room temperature is allowed to go up to +30°F and then is
pulled back down to -10°F, then...
A) The drive motor will run at a reduced load while pulling down
B) The drive motor may pull more amps while pulling down
C) The compressor efficiency will drop while pulling down
D) Both B and C - Answers -D) Both B and C
A "King Valve" is a?
A) Liquid line stop valve at the outlet of the high-pressure receiver (HPR)
B) Receiver inlet valve
C) Compressor discharge valve
D) Refrigerant charging valve - Answers -A) Liquid line stop valve at the outlet of the high-
pressure receiver (HPR)
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, Which compressor is NOT a positive displacement compressor?
A) Rotary Vane
B) Centrifugal
C) Rotary Screw
D) Reciprocating - Answers -B) Centrifugal
A low temperature Ammonia booster normally operates with a discharge temperature of 120°F.
The temperature of the discharge vapor suddenly drops to 80°F. What is indicated?
A) Higher BTU load in refrigerated areas
B) Suction superheat is too high
C) There is possibly liquid in the suction line
D) A hand expansion valve is closed off too much - Answers -C) There is possibly liquid in the
suction line
BTU's from the product and the heat of compression are rejected at?
A) The High-Pressure Receiver (HPR)
B) The evaporator
C) The expansion device
D) The condenser - Answers -D) The condenser
If an evaporator is rated at 120,000 BTU/HR, then the condenser must be...
A) Larger than the rated evaporator
B) Smaller than the rated evaporator
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AND VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
What is the direction of flow through every condenser?
A) Refrigerant enters at the bottom, leaves at the bottom
B) Refrigerant enters at the top, leaves at the top
C) Refrigerant enters at the top, leaves at the bottom
D) Refrigerant enters at the bottom, leaves at the top - Answers -C) Refrigerant enters at the top
and leaves at the bottom
Can wet bulb temperature affect the efficiency of an evaporative cooled condenser? (Yes or No)
- Answers -Yes
What conditions are associated with high head pressure?
A) Excessive energy used and compressor wear
B) Lower evaporator temperatures
C) Lower oil pressure
D) Higher efficiency - Answers -A) Excessive energy used and compressor wear
Head pressure is 162 PSIG, and condenser liquid drain temperature is 84°F. What could head
pressure be reduced to with proper purging?
A) 162 PSIG
B) 149 PSIG
1|Page
,C) 155 PSIG
D) 188 PSIG - Answers -B) 149 PSIG
(84°F SAT = 149 PSIG)
In order to convert 1 pound of saturated NH3 liquid to saturated NH3 gas, approximately how
much heat must be absorbed into the liquid at SAT conditions?
A) 561 BTU's
B) 144 BTU's
C) 970 BTU's
D) 1 BTU - Answers -A) 561 BTU's
A refrigerant line contains Ammonia at the following conditions: 80°F, 120 PSIG
What is the state of the refrigerant in the line?
A) The line contains SAT liquid
B) The line contains sub-cooled liquid
C) The line contains a mixture of liquid and vapor at SAT conditions
D) The line contains vapor - Answers -D) The line contains vapor
100°C is equal to?
A) 100°F
B) 212°F
C) 175°F
D) 200°F - Answers -°F = (°C x 1.8) + 32
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,°F = (100 x 1.8) + 32
°F = 212
Copper tubing is never used with?
A) HCFC 22
B) R-717
C) HCFC 134a
D) Any refrigerant - Answers -R-717 / NH3 / Ammonia
A compressor is properly matched with a drive motor on a system that works at -10°F
evaporating temperature. If the room temperature is allowed to go up to +30°F and then is
pulled back down to -10°F, then...
A) The drive motor will run at a reduced load while pulling down
B) The drive motor may pull more amps while pulling down
C) The compressor efficiency will drop while pulling down
D) Both B and C - Answers -D) Both B and C
A "King Valve" is a?
A) Liquid line stop valve at the outlet of the high-pressure receiver (HPR)
B) Receiver inlet valve
C) Compressor discharge valve
D) Refrigerant charging valve - Answers -A) Liquid line stop valve at the outlet of the high-
pressure receiver (HPR)
3|Page
, Which compressor is NOT a positive displacement compressor?
A) Rotary Vane
B) Centrifugal
C) Rotary Screw
D) Reciprocating - Answers -B) Centrifugal
A low temperature Ammonia booster normally operates with a discharge temperature of 120°F.
The temperature of the discharge vapor suddenly drops to 80°F. What is indicated?
A) Higher BTU load in refrigerated areas
B) Suction superheat is too high
C) There is possibly liquid in the suction line
D) A hand expansion valve is closed off too much - Answers -C) There is possibly liquid in the
suction line
BTU's from the product and the heat of compression are rejected at?
A) The High-Pressure Receiver (HPR)
B) The evaporator
C) The expansion device
D) The condenser - Answers -D) The condenser
If an evaporator is rated at 120,000 BTU/HR, then the condenser must be...
A) Larger than the rated evaporator
B) Smaller than the rated evaporator
4|Page
