10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The GCA-II exam has 120 questions and runs 7 hours.
These 10 free GCA-II questions are organized by exam domain, so you can see how each part of the Georgia Conditioned Air Contractor Class II Examination blueprint is tested. Reveal the answer and explanation under each question.
Before touching conductors in a locked-out rooftop disconnect, a technician must verify absence of voltage with a meter. Which sequence provides a valid live-dead-live check?
Correct answer: C - Test a known live source, test the circuit, then retest the live source
A conference room has a sensible cooling load of 21,600 Btu/h. Supply air will enter 20°F below room temperature. Using Q = 1.08 × CFM × ΔT, which design response is most appropriate?
Correct answer: B - Provide terminals totaling about 1,000 CFM with acceptable throw and noise
During design review, the predicted exterior surface temperature of a supply duct is 52°F while the surrounding air has a 57°F dew point. What condition must be addressed?
Correct answer: A - Condensation is likely; improve the insulation and vapor seal
At the stated design conditions, a building requires 58,000 Btu/h total cooling and 44,000 Btu/h sensible cooling. Which equipment rating is the closest acceptable match without unnecessary oversizing?
Correct answer: C - 60,000 Btu/h total and 46,000 Btu/h sensible
Two horizontal outdoor-air ducts will provide combustion air for appliances totaling 160,000 Btu/h. Each duct requires 1 in² of free area per 2,000 Btu/h, and the metal louvers have an unknown free area, so 75% is used. Which opening arrangement satisfies the calculation?
Correct answer: D - Two gross openings of 107 in² each
A chilled-water coil must deliver 600,000 Btu/h with a 12°F water temperature difference. Using Q = 500 × GPM × ΔT, measured flow at design load is 82 GPM. Which conclusion is justified?
Correct answer: C - Required flow is 100 GPM; the 82-GPM reading indicates insufficient flow
After a new split system reaches 420 microns, the vacuum pump is isolated. The reading rapidly rises past 2,200 microns and continues climbing. What should be done next?
Correct answer: A - Treat the result as a leak and locate and repair it before charging
A natural-draft water heater vents normally until the clothes dryer and range hood operate together; it then spills at the draft hood. The vent is unobstructed. What is the most appropriate next step?
Correct answer: B - Evaluate and correct worst-case depressurization and combustion-air provision
Service readings on a stabilized TXV system show verified airflow, low suction pressure, high superheat, high subcooling, and a 12°F temperature drop across the liquid-line filter-drier. What fault best fits this pattern?
Correct answer: D - Restricted liquid-line filter-drier
On a call for heat, the inducer and pressure switch sequence correctly, the hot-surface igniter glows, and the burners light. Three seconds later the gas valve closes, although manifold pressure was normal while flame was present. What should be checked next?
Correct answer: C - Measure flame-sense microamps and verify burner ground and polarity
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