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The AC & Heat Pump Professional exam has 100 questions and runs 2 hours.
These 10 free AC & Heat Pump Professional questions are organized by exam domain, so you can see how each part of the Air Conditioning and Heat Pump Professional blueprint is tested. Reveal the answer and explanation under each question.
After a homeowner raises the cooling setpoint, indoor temperature rises from 70°F to 76°F and relative humidity falls from about 60% to 49%. The measured dew point remains 55°F, and barometric pressure is unchanged. Which statement accurately interprets these measurements?
Correct answer: B - Humidity ratio is unchanged as the air warms.
During steady heating, a heat-pump system delivers a measured net 36,000 Btu/h to the conditioned space. True electrical input is 3.0 kW at the outdoor unit and a separate 0.6 kW at the indoor blower; together these measurements include all operating electrical loads. Resistance heat is off. Use 1 kW = 3,412 Btu/h. What is the approximate heating coefficient of performance (COP) for the complete system?
Correct answer: B - 2.9
A homeowner describes a heat-pump event on a cold, damp morning: the outdoor fan stopped while the compressor continued running, and a white plume rose from the outdoor unit. Within four minutes, the coil was clear of frost, the fan restarted, and normal indoor heating resumed. No fault was recorded. How should this event be handled?
Correct answer: D - Explain normal reverse-cycle defrost; continue automatic heating.
An atmospheric water heater spills only while a nearby air handler operates. Exhaust fans are off, the combustion appliance zone (CAZ) door stays open, and repeated blower-on tests make CAZ pressure more negative relative to outdoors. Which additional finding most directly identifies the air-handler pathway responsible?
Correct answer: D - Smoke is drawn through an open return-plenum seam located within the combustion appliance zone.
An R-410A split system operating in cooling mode with a thermostatic expansion valve (TXV) has low suction pressure, 28°F superheat, and 22°F subcooling at the condenser outlet; the specified subcooling is 10°F ±2°F. Indoor and outdoor airflow are correct. Verified contact probes read 96°F immediately before the liquid-line filter-drier and 81°F immediately after it. Which fault best accounts for the combined findings?
Correct answer: C - A restricted liquid-line filter-drier
Static-pressure taps matching the air-handler manufacturer's test boundary read +0.35 in. w.c. on the supply side and -0.25 in. w.c. on the return side, both relative to the same reference. At the installed blower setting, the chart lists 1,450 CFM at 0.10 in. w.c., 1,320 CFM at 0.25, 1,200 CFM at 0.35, and 1,000 CFM at 0.60. The required minimum is 1,100 CFM. What does the blower data indicate?
Correct answer: A - 1,000 CFM; below the specified minimum.
A post-retrofit Manual J calculation identifies cooling loads of 24,000 Btu/h sensible and 7,000 Btu/h latent. The project permits total cooling capacity from 31,000 to 35,000 Btu/h at design conditions. The following manufacturer-approved matched combinations have the listed net capacities at the same indoor and outdoor design conditions and their authorized airflows. Which combination should be specified?
Correct answer: C - 33,000 Btu/h total: 25,000 sensible and 8,000 latent.
A 40,000-Btu/h gas water heater and an 80,000-Btu/h gas furnace share a natural-draft vent. Under the prescribed depressurized test conditions, the water heater has completed acceptable spillage and flue-CO tests. What is the next spillage-test sequence required by ANSI/BPI-1200-S-2017?
Correct answer: A - Keep the water heater firing, start the furnace, and at two minutes of furnace main-burner operation check water-heater spillage, then furnace spillage.
A house reaches its cooling setpoint, but moisture measurements show that water vapor returns to the supply air after each compressor shutdown. The indoor blower runs continuously across a wet coil. Refrigerant charge and cooling airflow meet specifications, the ducts are tight and inside conditioned space, and outdoor-air ventilation is independently controlled. The most direct way to reduce this off-cycle moisture return is to:
Correct answer: D - Use the manufacturer's AUTO fan sequence so the blower stops between cooling calls.
The primary condensate pan in a draw-through air handler fills while the blower runs, then empties promptly when the blower stops. The drain is clear and correctly sloped, the pan is intact, and cooling airflow meets specifications. The drain connects directly to the negative-pressure pan without a water seal. The required correction is:
Correct answer: A - Install and prime the manufacturer-specified condensate trap, sized for the air handler's negative pressure.
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