HVAC EXCELLENCE Exam (New 2026/ 2027
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
An AC system that is oversized can cause - Correct answer inefficient dehumidification
of the conditioned space
While troubleshooting a residential split, tech finds low pressures and low amp draws.
Indicating - Correct answer Low airflow across Evaporator
Air or other non-condensable gasses in a capillary tube AC system will cause -
Correct answer High suction pressure and high discharge pressure
A refrigerant overcharge in a capillary tube air conditioning system will cause -
Correct answer High suction pressure and high Discharge pressure
A compressor that has a broken reed valve will cause these symptoms - Correct
answer high suction pressure and low discharge pressure
,A low refrigerant charge in an AC system will cause these symptoms - Correct answer
low suction pressure and low discharge pressure
A TEV sensing bulb which becomes detached from the suction line will cause these
symptoms - Correct answer high suction pressure and higher than normal dischage
pressure
A faulty condenser fan motor on an AC system will cause these symptoms - Correct
answer high suction pressure and high discharge pressure
A dirty evaporator in an AC system will cause these symptoms - Correct answer low
suction pressure and low discharge pressure.
Heat which causes a change in temperature of a substance is called - Correct answer
sensible heat,
, Heat added to a substance without a rise in temperature; (example: liquid refrigerant
to gas) this process la called? - Correct answer latent heat
Heat added to the refrigerant in vapor state after the evaporation process is called, -
Correct answer superheat
A scroll compressor moves refrigerant by means of; - Correct answer involute spirals
The movement of heat by way of fluid or is called; air - Correct answer convection
The movement of heat through a solid object is called; - Correct answer radiation
The standard unit for measuring the quantity of heat in a substance is - Correct
answer British Thermal Unit
A refrigerant gives up heat when it; - Correct answer it condenses
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
An AC system that is oversized can cause - Correct answer inefficient dehumidification
of the conditioned space
While troubleshooting a residential split, tech finds low pressures and low amp draws.
Indicating - Correct answer Low airflow across Evaporator
Air or other non-condensable gasses in a capillary tube AC system will cause -
Correct answer High suction pressure and high discharge pressure
A refrigerant overcharge in a capillary tube air conditioning system will cause -
Correct answer High suction pressure and high Discharge pressure
A compressor that has a broken reed valve will cause these symptoms - Correct
answer high suction pressure and low discharge pressure
,A low refrigerant charge in an AC system will cause these symptoms - Correct answer
low suction pressure and low discharge pressure
A TEV sensing bulb which becomes detached from the suction line will cause these
symptoms - Correct answer high suction pressure and higher than normal dischage
pressure
A faulty condenser fan motor on an AC system will cause these symptoms - Correct
answer high suction pressure and high discharge pressure
A dirty evaporator in an AC system will cause these symptoms - Correct answer low
suction pressure and low discharge pressure.
Heat which causes a change in temperature of a substance is called - Correct answer
sensible heat,
, Heat added to a substance without a rise in temperature; (example: liquid refrigerant
to gas) this process la called? - Correct answer latent heat
Heat added to the refrigerant in vapor state after the evaporation process is called, -
Correct answer superheat
A scroll compressor moves refrigerant by means of; - Correct answer involute spirals
The movement of heat by way of fluid or is called; air - Correct answer convection
The movement of heat through a solid object is called; - Correct answer radiation
The standard unit for measuring the quantity of heat in a substance is - Correct
answer British Thermal Unit
A refrigerant gives up heat when it; - Correct answer it condenses
