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 GA-CAC exam has 120 questions and runs 7 hours.
These 10 free GA-CAC questions are organized by exam domain, so you can see how each part of the Georgia Conditioned Air Contractor Class II (Unrestricted) License Exam blueprint is tested. Reveal the answer and explanation under each question.
A rooftop unit passes the local final inspection. Before startup, the contractor notices that the approved installation leaves only 24 in. at the service side, while the unit's listed instructions require 36 in. for removal of the heat-exchanger section. What should the contractor do?
Correct answer: A - Revise the installation to provide the listed 36-in. service clearance
After contract execution, an owner asks the crew to add an economizer that was not included in the drawings or price. The request is not an emergency, and the added work will affect both cost and the startup date. What is the contractor's best next step?
Correct answer: B - Obtain a written change order defining scope, price, and time before installation
For a conference room, the calculated sensible cooling load is 16,200 Btu/h and the total cooling load is 24,000 Btu/h. The design supply air is 20°F colder than the room, and standard-air conditions may be used. Using the sensible-load relationship, what supply airflow is required?
Correct answer: A - 750 CFM
Expanded performance data at the project's design conditions give the capacities below. The calculated load is 46,000 Btu/h total and 35,000 Btu/h sensible. Which selection meets both loads without unnecessary oversizing?
Correct answer: C - Unit D: 50,000 total; 37,000 sensible
In a residential duct design, the blower is rated for 0.50 in. w.c. external static pressure. The filter, coil, and grilles account for 0.18 in. w.c. of pressure drop outside the duct path, and the critical-path total effective length is 160 ft. What friction rate should be used to size that path?
Correct answer: B - 0.20 in. w.c. per 100 ft
A two-pipe steam coil remains cold and begins to hammer. Steam is present at the coil inlet, the coil pitch and downstream return have been verified, condensate is backed up, and the trap outlet remains cool. Which fault best fits all of the findings?
Correct answer: D - The steam trap has failed closed and is blocking condensate discharge
The design airflow of a single return-air system is 2,400 CFM. No exception applies, and the system is not part of a special engineered smoke-control arrangement. Which provision belongs in the design?
Correct answer: B - A return-duct smoke detector at the required location
During commissioning, a natural-draft furnace vents normally until a 1,200-CFM kitchen exhaust fan starts; flue gas then spills from the draft hood. After the unsafe test is stopped, what permanent correction should be incorporated?
Correct answer: C - Provide controlled makeup air and verify draft under worst-case exhaust
On a closed chilled-water loop serving the first and sixth floors, the system is completely filled and vented. A designer adds the full six-story elevation to the calculated piping and coil friction when selecting the circulator. What is wrong with that approach?
Correct answer: C - Closed-loop pump head is based on friction; elevation mainly sets fill pressure
At minimum capacity, a variable-capacity system's long vertical suction riser has oil-return velocity below the manufacturer's requirement, although full-load pressure drop is acceptable. How should the riser design be revised?
Correct answer: A - Use the manufacturer's approved double-riser oil-return arrangement
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