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Arizona C-39 Air Conditioning, Refrigeration & Heating EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Arizona C-39 Air Conditioning, Refrigeration & Heating Exam (2026)
10-Line Exam Coverage in Points Form
1. Exam Logistics & Requirements - 80 questions, 3-hour time limit, 70% passing score,
closed-book format, administered by PSI/Pearson VUE (candidate must verify current
provider), 4 years verifiable experience required for licensure
2. License Classifications - C-39 (Commercial), R-39R (Residential), and dual CR-39; scope
includes installation, alteration, and repair of comfort air conditioning, refrigeration,
evaporative cooling, ventilating, and heating systems
3. Electrical Systems & Service Panels - Adding new circuits to existing service panels
permitted; installation of new service panel or sub-panel is excluded from scope; OSHA
1926 requirements
4. Refrigeration Fundamentals - Vapor-compression cycle, subcooling (cooling below
saturation temperature), superheat, R-410A high-side pressures (200-300 psi),
accumulator function (prevents liquid slugging)
5. Heating Systems (Wet & Dry) - Wet systems (steam/hot water boilers): hot water limited
to 30 PSIG at 220°F, steam limited to 15 PSIG; Dry systems include gas-fired furnaces and
space heaters
6. Ventilation & Air Distribution - Ductwork, air filtering devices, thermal/acoustical
insulation, vibration isolation materials, static pressure targets (~0.2 in. wg for residential
systems)
7. Controls & Instrumentation - Pneumatic or electrical controls and control piping;
pressure-reducing valves, pressure switches, thermostats, and control system
components
8. Fuel Gas & Water Piping - Liquid fuel piping and tanks, water and gas piping from service
connection to equipment; IFGC code requirements for gas piping sizing and safety
9. Testing, Balancing & Inspections - Testing and balancing of refrigerant, cooling and
heating circuits, and air handling systems; SMACNA TAB standards, airflow measurement
(CFM = velocity × area)
10. Solar Equipment & Evaporative Cooling - Installation and repair with or without solar
equipment; evaporative cooling units, including installation, alteration, and repair of
evaporative coolers and ventilators
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100 MCQ Questions with Rationales
1. What is the primary scope of work permitted under an Arizona C-39 Air Conditioning and
Refrigeration license?
A) Installation of new electrical service panels only
B) Installation, alteration, and repair of refrigeration, evaporative cooling, and heating systems
C) Plumbing and piping for all building systems
D) Electrical wiring for all building circuits
Correct Answer: B
Rationale: The C-39 license covers installation, alteration, and repair of comfort air conditioning
systems, including refrigeration, evaporative cooling, ventilating, and heating with or without
solar equipment.
2. What is the maximum operating pressure allowed for a hot water boiler under the C-39
scope?
A) 15 PSIG
B) 30 PSIG
C) 50 PSIG
D) 100 PSIG
Correct Answer: B
Rationale: "Wet" systems including hot water boilers are limited to 30 PSIG operating pressure
and 220°F, while steam systems are limited to 15 PSIG.
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3. What is the maximum operating pressure allowed for a steam boiler under the C-39 scope?
A) 5 PSIG
B) 10 PSIG
C) 15 PSIG
D) 30 PSIG
Correct Answer: C
Rationale: Steam boilers under the C-39 scope are limited to 15 PSIG operating pressure.
4. What is the maximum water temperature permitted for a hot water boiler under the C-39
scope?
A) 180°F
B) 200°F
C) 220°F
D) 250°F
Correct Answer: C
Rationale: Hot water boilers under the C-39 scope are limited to 220°F operating temperature.
5. What electrical work is a C-39 licensee permitted to perform?
A) Installation of a new main service panel
B) Installation of a new sub-panel
C) Adding a new circuit to an existing service panel or sub-panel
D) Full electrical service upgrades
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Correct Answer: C
Rationale: A C-39 licensee may add a new circuit to an existing service panel or sub-panel, but
installation of a new service panel or sub-panel is excluded from scope.
6. What is the passing score for the Arizona C-39 examination?
A) 65%
B) 70%
C) 75%
D) 80%
Correct Answer: B
Rationale: The C-39 exam requires a score of 70% correct to pass.
7. How many questions are on the Arizona C-39 examination?
A) 50
B) 60
C) 80
D) 100
Correct Answer: C
Rationale: The C-39 exam consists of 80 questions.
8. What is the time limit for completing the Arizona C-39 exam?
A) 2 hours
B) 2.5 hours
Arizona C-39 Air Conditioning, Refrigeration & Heating EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Arizona C-39 Air Conditioning, Refrigeration & Heating Exam (2026)
10-Line Exam Coverage in Points Form
1. Exam Logistics & Requirements - 80 questions, 3-hour time limit, 70% passing score,
closed-book format, administered by PSI/Pearson VUE (candidate must verify current
provider), 4 years verifiable experience required for licensure
2. License Classifications - C-39 (Commercial), R-39R (Residential), and dual CR-39; scope
includes installation, alteration, and repair of comfort air conditioning, refrigeration,
evaporative cooling, ventilating, and heating systems
3. Electrical Systems & Service Panels - Adding new circuits to existing service panels
permitted; installation of new service panel or sub-panel is excluded from scope; OSHA
1926 requirements
4. Refrigeration Fundamentals - Vapor-compression cycle, subcooling (cooling below
saturation temperature), superheat, R-410A high-side pressures (200-300 psi),
accumulator function (prevents liquid slugging)
5. Heating Systems (Wet & Dry) - Wet systems (steam/hot water boilers): hot water limited
to 30 PSIG at 220°F, steam limited to 15 PSIG; Dry systems include gas-fired furnaces and
space heaters
6. Ventilation & Air Distribution - Ductwork, air filtering devices, thermal/acoustical
insulation, vibration isolation materials, static pressure targets (~0.2 in. wg for residential
systems)
7. Controls & Instrumentation - Pneumatic or electrical controls and control piping;
pressure-reducing valves, pressure switches, thermostats, and control system
components
8. Fuel Gas & Water Piping - Liquid fuel piping and tanks, water and gas piping from service
connection to equipment; IFGC code requirements for gas piping sizing and safety
9. Testing, Balancing & Inspections - Testing and balancing of refrigerant, cooling and
heating circuits, and air handling systems; SMACNA TAB standards, airflow measurement
(CFM = velocity × area)
10. Solar Equipment & Evaporative Cooling - Installation and repair with or without solar
equipment; evaporative cooling units, including installation, alteration, and repair of
evaporative coolers and ventilators
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100 MCQ Questions with Rationales
1. What is the primary scope of work permitted under an Arizona C-39 Air Conditioning and
Refrigeration license?
A) Installation of new electrical service panels only
B) Installation, alteration, and repair of refrigeration, evaporative cooling, and heating systems
C) Plumbing and piping for all building systems
D) Electrical wiring for all building circuits
Correct Answer: B
Rationale: The C-39 license covers installation, alteration, and repair of comfort air conditioning
systems, including refrigeration, evaporative cooling, ventilating, and heating with or without
solar equipment.
2. What is the maximum operating pressure allowed for a hot water boiler under the C-39
scope?
A) 15 PSIG
B) 30 PSIG
C) 50 PSIG
D) 100 PSIG
Correct Answer: B
Rationale: "Wet" systems including hot water boilers are limited to 30 PSIG operating pressure
and 220°F, while steam systems are limited to 15 PSIG.
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3. What is the maximum operating pressure allowed for a steam boiler under the C-39 scope?
A) 5 PSIG
B) 10 PSIG
C) 15 PSIG
D) 30 PSIG
Correct Answer: C
Rationale: Steam boilers under the C-39 scope are limited to 15 PSIG operating pressure.
4. What is the maximum water temperature permitted for a hot water boiler under the C-39
scope?
A) 180°F
B) 200°F
C) 220°F
D) 250°F
Correct Answer: C
Rationale: Hot water boilers under the C-39 scope are limited to 220°F operating temperature.
5. What electrical work is a C-39 licensee permitted to perform?
A) Installation of a new main service panel
B) Installation of a new sub-panel
C) Adding a new circuit to an existing service panel or sub-panel
D) Full electrical service upgrades
, Page 4 of 105
Correct Answer: C
Rationale: A C-39 licensee may add a new circuit to an existing service panel or sub-panel, but
installation of a new service panel or sub-panel is excluded from scope.
6. What is the passing score for the Arizona C-39 examination?
A) 65%
B) 70%
C) 75%
D) 80%
Correct Answer: B
Rationale: The C-39 exam requires a score of 70% correct to pass.
7. How many questions are on the Arizona C-39 examination?
A) 50
B) 60
C) 80
D) 100
Correct Answer: C
Rationale: The C-39 exam consists of 80 questions.
8. What is the time limit for completing the Arizona C-39 exam?
A) 2 hours
B) 2.5 hours
