Page 1 of 59
GCAP OPERATOR 1 EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS | BRAND
NEW!
A condenser converts the refrigerant from _____ to _____ when it
removes heat.
A) Liquid to Gas
B) Gas to Liquid
C) Cold to Hot
D) Gas to Solid - ✔✔✔ Correct Answer > B) Gas to Liquid
Liquid drain from the condenser is 82°F and head pressure is 182
PSIG. What is indicated?
A) Perfect system
B) Probable non-consensable gasses
C) Fans are not running
D) Water is no circulating - ✔✔✔ Correct Answer > B) Probable non-
condensable gasses
(82°F SAT = 144 PSIG)
(182 PSIG - 144 PSIG = 38 PSIG non-condensables)
,Page 2 of 59
The metering or expansion valve controls?
A) Temperature
B) Pressure
C) Flow
D) Velocity - ✔✔✔ Correct Answer > C) Flow
To classify a metering valve as an actual expansion valve what
must happen across the valve?
A) Pressure Drop
B) Temperature Drop
C) Increase in Velocity
D) All of the above - ✔✔✔ Correct Answer > D) All of the above
Evaporators can be coolers, freezers, blast freezers, ice
machines, etc..., what is one common application to them all as
the refrigerant absorbs heat?
A) Convert gas to liquid by absorbing heat
B) Convert liquid to gas by absorbing heat
C) De-superheat the refrigerant by absorbing heat
D) Remove heat from the refrigeration system - ✔✔✔ Correct Answer >
B) Convert liquid to gas by absorbing heat
,Page 3 of 59
If one dropped suction pressure of a refrigeration system, what
would NOT happen?
A) Rise in discharge pressure
B) Rise in discharge temperature
C) Rise in compression ratio
D) Rise in boiling temperature - ✔✔✔ Correct Answer > D) Rise in
boiling temperature
If one increased superheat on the inlet of a compressor, what
would most likely happen?
A) Rise in discharge temperature
B) Rise in oil pressure
C) Decrease in discharge temperature
D) Decrease in oil pressure - ✔✔✔ Correct Answer > A) Rise in
discharge temperature
What component controls the overall high side pressure of a
mechanical refrigeration system?
A) Compressor
B) Condenser
C) Expansion Device
D) Evaporator - ✔✔✔ Correct Answer > B) Condenser
, Page 4 of 59
What would be the % of flash/tax gas produced if one pound of
liquid Ammonia would convert to gas across the expansion valve
with 95ºF condensing temperature and -40ºF evaporating
temperature?
A) Approximately 27%
B) Approximately 21%
C) Approximately 17%
D) Approximately 12% - ✔✔✔ Correct Answer > A Flash/Tax Gas = [(T1 -
T2) x 1.12] / 561
Flash/Tax Gas = [(95ºF - -40ºF)] x 1.
Flash/Tax Gas = 27%
What are the three liquid feed types?
A) DX/Dry Expansion
B) Overfeed/Recirculated
C) Flooded/Gravity
D) All of the above - ✔✔✔ Correct Answer > D) All of the above
In a DX evaporator, the refrigerant should leave in what
condition?
A) Superheated
B) Sub-cooled
GCAP OPERATOR 1 EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS | BRAND
NEW!
A condenser converts the refrigerant from _____ to _____ when it
removes heat.
A) Liquid to Gas
B) Gas to Liquid
C) Cold to Hot
D) Gas to Solid - ✔✔✔ Correct Answer > B) Gas to Liquid
Liquid drain from the condenser is 82°F and head pressure is 182
PSIG. What is indicated?
A) Perfect system
B) Probable non-consensable gasses
C) Fans are not running
D) Water is no circulating - ✔✔✔ Correct Answer > B) Probable non-
condensable gasses
(82°F SAT = 144 PSIG)
(182 PSIG - 144 PSIG = 38 PSIG non-condensables)
,Page 2 of 59
The metering or expansion valve controls?
A) Temperature
B) Pressure
C) Flow
D) Velocity - ✔✔✔ Correct Answer > C) Flow
To classify a metering valve as an actual expansion valve what
must happen across the valve?
A) Pressure Drop
B) Temperature Drop
C) Increase in Velocity
D) All of the above - ✔✔✔ Correct Answer > D) All of the above
Evaporators can be coolers, freezers, blast freezers, ice
machines, etc..., what is one common application to them all as
the refrigerant absorbs heat?
A) Convert gas to liquid by absorbing heat
B) Convert liquid to gas by absorbing heat
C) De-superheat the refrigerant by absorbing heat
D) Remove heat from the refrigeration system - ✔✔✔ Correct Answer >
B) Convert liquid to gas by absorbing heat
,Page 3 of 59
If one dropped suction pressure of a refrigeration system, what
would NOT happen?
A) Rise in discharge pressure
B) Rise in discharge temperature
C) Rise in compression ratio
D) Rise in boiling temperature - ✔✔✔ Correct Answer > D) Rise in
boiling temperature
If one increased superheat on the inlet of a compressor, what
would most likely happen?
A) Rise in discharge temperature
B) Rise in oil pressure
C) Decrease in discharge temperature
D) Decrease in oil pressure - ✔✔✔ Correct Answer > A) Rise in
discharge temperature
What component controls the overall high side pressure of a
mechanical refrigeration system?
A) Compressor
B) Condenser
C) Expansion Device
D) Evaporator - ✔✔✔ Correct Answer > B) Condenser
, Page 4 of 59
What would be the % of flash/tax gas produced if one pound of
liquid Ammonia would convert to gas across the expansion valve
with 95ºF condensing temperature and -40ºF evaporating
temperature?
A) Approximately 27%
B) Approximately 21%
C) Approximately 17%
D) Approximately 12% - ✔✔✔ Correct Answer > A Flash/Tax Gas = [(T1 -
T2) x 1.12] / 561
Flash/Tax Gas = [(95ºF - -40ºF)] x 1.
Flash/Tax Gas = 27%
What are the three liquid feed types?
A) DX/Dry Expansion
B) Overfeed/Recirculated
C) Flooded/Gravity
D) All of the above - ✔✔✔ Correct Answer > D) All of the above
In a DX evaporator, the refrigerant should leave in what
condition?
A) Superheated
B) Sub-cooled
