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GCAP INDUSTRIAL AMMONIA REFRIGERATION TRAINING
EXAM NEWEST 2025/2026 WITH COMPLETE QUESTIONS
AND VERIFIED ANSWERS |ALREADY GRADED A+|
To classify a metering valve as an actual expansion valve what
must happen across the valve? - ANSWER-Pressure drop,
Temperature drop, and increase in velocity.
Evaporators can be coolers, freezers, blast freezers, ice
machines etc., what is one common application to them all as the
refrigerant absorbs heat? - ANSWER-Convert liquid to gas by
absorbing heat.
If one dropped suction pressure of a refrigerant system, what 3
things would happen? - ANSWER-Rise in Discharge/Temperature
pressure, and compression ratio.
If one increase superheat on the inlet of the compressor, what
would most likely happen? - ANSWER-Rise in discharge
temperature
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What component controls the overall highside pressure of a
mechanical refrigeration system? - ANSWER-Condenser.
What would be the % of gas produced if one pound of liquid
Ammonia would convert to gas across the expansion valve with
95° F Condensing temperature and -40° F evaporating
temperature? Flash/Tax gas = {(TD x 1.12) / 561} - ANSWER-
Approximately 27%
What are the three feeds? - ANSWER-DX or dry expansion,
overfeed or recirculated, and flooded or gravity.
In a DX or dry expansion evaporator the refrigerant should leave
in what condition? - ANSWER-Superheated.
If using a TXV, what style of evaporator are you using? -
ANSWER-DX
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An increase of heat (superheat) on the "bulb of a TXV" causes
what through the value? - ANSWER-Valve to stay open or open
more.
All flooded systems are unique in that they supply SAT liquid
refrigerant to the bottom of the evaporator from what component?
- ANSWER-Surge drum (LPR)
Cavitation is good for liquid pump. True or False - ANSWER-False
Semi hermetic pumps have an external motor connected to the
Armature with a mechanical shaft seal. True or False - ANSWER-
False
Typically, how much superheat is found on the outlet of an
evaporator under normal load conditions using the overfeed
design? - ANSWER-0°F
In hot gas defrost? - ANSWER-High-pressure gas from the
compressor discharge is piped through the evaporator.
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What style of systems uses a liquid pump to transfer liquid to
evaporators? - ANSWER-Overfeed.
An air evaporator that is tubed with fins, by design what happens
to the spacing of the fins as systems are designed for colder
applications? - ANSWER-Once design temperatures are below -
32° F, the fins must be spaced further apart due to freezing of
moisture.
In a pump overfeed system, what must shut off in the event of all
compressors shutting down? - ANSWER-Liquid feed
Another reference to the flooded system is? - ANSWER-
Thermosyphon
What style of compressor are used in the industrial Ammonia
refrigeration system ? - ANSWER-Positive displacement,
Reciprocating, and Rotary vane,
GCAP INDUSTRIAL AMMONIA REFRIGERATION TRAINING
EXAM NEWEST 2025/2026 WITH COMPLETE QUESTIONS
AND VERIFIED ANSWERS |ALREADY GRADED A+|
To classify a metering valve as an actual expansion valve what
must happen across the valve? - ANSWER-Pressure drop,
Temperature drop, and increase in velocity.
Evaporators can be coolers, freezers, blast freezers, ice
machines etc., what is one common application to them all as the
refrigerant absorbs heat? - ANSWER-Convert liquid to gas by
absorbing heat.
If one dropped suction pressure of a refrigerant system, what 3
things would happen? - ANSWER-Rise in Discharge/Temperature
pressure, and compression ratio.
If one increase superheat on the inlet of the compressor, what
would most likely happen? - ANSWER-Rise in discharge
temperature
, Page |2
What component controls the overall highside pressure of a
mechanical refrigeration system? - ANSWER-Condenser.
What would be the % of gas produced if one pound of liquid
Ammonia would convert to gas across the expansion valve with
95° F Condensing temperature and -40° F evaporating
temperature? Flash/Tax gas = {(TD x 1.12) / 561} - ANSWER-
Approximately 27%
What are the three feeds? - ANSWER-DX or dry expansion,
overfeed or recirculated, and flooded or gravity.
In a DX or dry expansion evaporator the refrigerant should leave
in what condition? - ANSWER-Superheated.
If using a TXV, what style of evaporator are you using? -
ANSWER-DX
, Page |3
An increase of heat (superheat) on the "bulb of a TXV" causes
what through the value? - ANSWER-Valve to stay open or open
more.
All flooded systems are unique in that they supply SAT liquid
refrigerant to the bottom of the evaporator from what component?
- ANSWER-Surge drum (LPR)
Cavitation is good for liquid pump. True or False - ANSWER-False
Semi hermetic pumps have an external motor connected to the
Armature with a mechanical shaft seal. True or False - ANSWER-
False
Typically, how much superheat is found on the outlet of an
evaporator under normal load conditions using the overfeed
design? - ANSWER-0°F
In hot gas defrost? - ANSWER-High-pressure gas from the
compressor discharge is piped through the evaporator.
, Page |4
What style of systems uses a liquid pump to transfer liquid to
evaporators? - ANSWER-Overfeed.
An air evaporator that is tubed with fins, by design what happens
to the spacing of the fins as systems are designed for colder
applications? - ANSWER-Once design temperatures are below -
32° F, the fins must be spaced further apart due to freezing of
moisture.
In a pump overfeed system, what must shut off in the event of all
compressors shutting down? - ANSWER-Liquid feed
Another reference to the flooded system is? - ANSWER-
Thermosyphon
What style of compressor are used in the industrial Ammonia
refrigeration system ? - ANSWER-Positive displacement,
Reciprocating, and Rotary vane,
