ABYC Air Conditioning & Refridgeration
Certification Exam 2026 Questions and
Answers
Absolute Humidity - Correct answer-The weight of water vapor in a given amount
of air (Grains per cubic foot)
Absolute Pressure - Correct answer-Pressure measured with a base of zero
Absolute Temperature - Correct answer-A temperature scale using absolute zero as
a reference - Rankin or Kelvin Scale (may be measures in degrees C or F)
Absolute Zero - Correct answer-Theoretical temperature at which all molecular
activity ceases = -273.16 C or -456.69 F
250% - Correct answer-By approximately how much (%) does a start capacitor
increase motor torque?
C. Both - Correct answer-Tech A says that it is possible to identify the start and run
windings of a motor with an ohm meter by noting which has higher resistance,
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,indicating the start windings. Tech B say the highest resistance will be noted when
measuring from run to start terminals. Which is correct?
A. Tech A
B. Tech B
C. Both
D. Neigher
Compressor - Correct answer-The heart of a system, keeps the refridgerant flowing
at specific rates of flow, at specific temperatures.
Inlet (suction), shuts down system if pressure drops too low. - Correct answer-On
which side of a compressor is the low pressure switch, inlet or outlet, and what
function does it provide?
Outlet, shuts down compressor if pressure gets too high (to protect the
compressor). - Correct answer-On which side of a compressor is the high pressure
switch, inlet or outlet, and what function does it provide?
Condenser - Correct answer-Air or water cooled heat exchanger which absorbs
latent heat energy of hot refridgerant gas and causes it to become a liquid.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
,Metering Device (AKA Expansion Device/Tube/Valve, TXV, or Capillary Tube) -
Correct answer-Maintains a specific rate of flow from the high-pressure side of a
refridgeration system into the low-pressure side.
Evaporator - Correct answer-Air heat-exchanger that allows heat from incoming air
to pass into the cold refridgerant liquid which absorbs latent heat and evaporates in
the process, cooling the exit air.
KLIXON overload protector - Correct answer-Trademark for a popular
manufacturer of compressor overload protector device. (Also manufactures
overcurrent protection devices, switches, and thermostats used in HVAC systems)
Running at lower than rated voltage (increases current draw and thus temperature
of windings) - Correct answer-What is a common cause of motor winding
insulation leakage/breakdown?
3.412 BTU's/Hour = 1 Watt - Correct answer-1 Watt is equal to how many BTU's
per hour?
1 BTU / hr = 0.293 Watts - Correct answer-1 BTU per hour is equal to how many
Watts?
Tech B (motors have PF < 1) - Correct answer-When calculating power draw for a
motor, Tech A says to multiply Amps by Volts. Tech B says this is true, but it would
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
, be more accurate to include a third multiplier, Power Factor to give accurate real
power draw. Who is most correct?
Potential Relay - Correct answer-Another name for Start Relay
return should be 20% bigger than source - Correct answer-Ho much bigger should
an air conditioning return duct be compared to the discharge duct?
Waist heigh or higher - Correct answer-At what height should A/C discharge ducts
be located in the cabin?
low, near the floor - Correct answer-At what height should A/C return duct sources
be located in the cabin?
risk of CO ingress - Correct answer-Why should A/C condensate drain hose not be
discharged into the engine room bilge area?
3 feet - Correct answer-What is the minimal distance on the outside of the hull
between A/C condensate discharge outlet and engine exhaust outlet?
5/8 inch - Correct answer-What is the minimum diameter recommended for A/C
condensate drain hose?
increased suction causing low-pressure switch activation or tripped circuit breaker
- Correct answer-What are some possible manifestation from an overly dirty A/C
air filter?
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
Certification Exam 2026 Questions and
Answers
Absolute Humidity - Correct answer-The weight of water vapor in a given amount
of air (Grains per cubic foot)
Absolute Pressure - Correct answer-Pressure measured with a base of zero
Absolute Temperature - Correct answer-A temperature scale using absolute zero as
a reference - Rankin or Kelvin Scale (may be measures in degrees C or F)
Absolute Zero - Correct answer-Theoretical temperature at which all molecular
activity ceases = -273.16 C or -456.69 F
250% - Correct answer-By approximately how much (%) does a start capacitor
increase motor torque?
C. Both - Correct answer-Tech A says that it is possible to identify the start and run
windings of a motor with an ohm meter by noting which has higher resistance,
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,indicating the start windings. Tech B say the highest resistance will be noted when
measuring from run to start terminals. Which is correct?
A. Tech A
B. Tech B
C. Both
D. Neigher
Compressor - Correct answer-The heart of a system, keeps the refridgerant flowing
at specific rates of flow, at specific temperatures.
Inlet (suction), shuts down system if pressure drops too low. - Correct answer-On
which side of a compressor is the low pressure switch, inlet or outlet, and what
function does it provide?
Outlet, shuts down compressor if pressure gets too high (to protect the
compressor). - Correct answer-On which side of a compressor is the high pressure
switch, inlet or outlet, and what function does it provide?
Condenser - Correct answer-Air or water cooled heat exchanger which absorbs
latent heat energy of hot refridgerant gas and causes it to become a liquid.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
,Metering Device (AKA Expansion Device/Tube/Valve, TXV, or Capillary Tube) -
Correct answer-Maintains a specific rate of flow from the high-pressure side of a
refridgeration system into the low-pressure side.
Evaporator - Correct answer-Air heat-exchanger that allows heat from incoming air
to pass into the cold refridgerant liquid which absorbs latent heat and evaporates in
the process, cooling the exit air.
KLIXON overload protector - Correct answer-Trademark for a popular
manufacturer of compressor overload protector device. (Also manufactures
overcurrent protection devices, switches, and thermostats used in HVAC systems)
Running at lower than rated voltage (increases current draw and thus temperature
of windings) - Correct answer-What is a common cause of motor winding
insulation leakage/breakdown?
3.412 BTU's/Hour = 1 Watt - Correct answer-1 Watt is equal to how many BTU's
per hour?
1 BTU / hr = 0.293 Watts - Correct answer-1 BTU per hour is equal to how many
Watts?
Tech B (motors have PF < 1) - Correct answer-When calculating power draw for a
motor, Tech A says to multiply Amps by Volts. Tech B says this is true, but it would
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
, be more accurate to include a third multiplier, Power Factor to give accurate real
power draw. Who is most correct?
Potential Relay - Correct answer-Another name for Start Relay
return should be 20% bigger than source - Correct answer-Ho much bigger should
an air conditioning return duct be compared to the discharge duct?
Waist heigh or higher - Correct answer-At what height should A/C discharge ducts
be located in the cabin?
low, near the floor - Correct answer-At what height should A/C return duct sources
be located in the cabin?
risk of CO ingress - Correct answer-Why should A/C condensate drain hose not be
discharged into the engine room bilge area?
3 feet - Correct answer-What is the minimal distance on the outside of the hull
between A/C condensate discharge outlet and engine exhaust outlet?
5/8 inch - Correct answer-What is the minimum diameter recommended for A/C
condensate drain hose?
increased suction causing low-pressure switch activation or tripped circuit breaker
- Correct answer-What are some possible manifestation from an overly dirty A/C
air filter?
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
