HVAC Excellence Actual Exam Questions and Verified Answers – All Chapters Included (Updated for 2026)

HVAC EXCELLENCE ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
ALREADY GRADED A+ 2026-2027.



A refrigerant overcharge in a capillary tube air conditioning system will cause

- ANSWER-High suction pressure and high Discharge pressure




A compressor that has a broken reed valve will cause these symptoms -

ANSWER-high suction pressure and low discharge pressure




A low refrigerant charge in an AC system will cause these symptoms -

ANSWER-low suction pressure and low discharge pressure

,A TEV sensing bulb which becomes detached from the suction line will cause

these symptoms - ANSWER-high suction pressure and higher than normal

dischage pressure




a faulty condenser fan motor on an AC system will cause these symptoms -

ANSWER-high suction pressure and high discharge pressure




a dirty evaporator in an AC system will cause these symptoms - ANSWER-low

suction pressure and low discharge pressure




Heat which causes a change in temperature of a substance is called - ANSWER-

sensible heat,




Heat added to a substance without a rise in temperature; (example: liquid

refrigerant to gas) this process la called? - ANSWER-latent heat

, Heat added to the refrigerant in vapor state after the evaporation process is

called, - ANSWER-superheat




A scroll compressor moves refrigerant by means of; - ANSWER-involute

spirals




The movement of heat by way of fluid or is called; air - ANSWER-convection




The movement of heat through a solid object is called; - ANSWER-radiation




The standard unit for measuring the quantity of heat in a substance is -

ANSWER-British Thermal Unit




A refrigerant gives up heat when it; - ANSWER-it condenses