Arizona HVAC Technician Licensing Exam –
Practice Questions (EPA 608 + State) 2026
Latest version Q&A |INSTANT DOWNLOAD
PDF
1. Which type of refrigerant is classified as a “Class I” under EPA regulations?
A) R-134a
B) R-22
C) R-12
D) R-410A
*Correct answer: C) R-12 – Class I refrigerants are chlorofluorocarbons (CFCs), like
R-12, with high ozone depletion potential.
2. What is the primary purpose of a TXV (Thermostatic Expansion Valve) in an
HVAC system?
A) To increase refrigerant pressure
B) To regulate refrigerant flow into the evaporator
C) To filter out contaminants
D) To measure system temperature
*Correct answer: B) To regulate refrigerant flow into the evaporator – TXVs
ensure the evaporator receives the proper amount of refrigerant based on load
conditions.
3. Which EPA certification type is required to service small appliances under 5
lbs of refrigerant?
A) Type I
B) Type II
C) Type III
D) Universal
*Correct answer: A) Type I – Type I certification covers servicing small appliances
containing 5 lbs or less of refrigerant.
,4. In Arizona, which license allows a technician to work on commercial HVAC
systems?
A) Class I HVAC
B) Class II HVAC
C) Restricted HVAC
D) Unrestricted HVAC
*Correct answer: D) Unrestricted HVAC – Unrestricted licenses allow service on all
HVAC systems, including commercial.
5. What is the safe pressure testing method for a system with R-410A
refrigerant?
A) Using compressed air
B) Using nitrogen with a pressure regulator
C) Using oxygen
D) Using water
*Correct answer: B) Using nitrogen with a pressure regulator – Nitrogen is inert
and safe for leak testing; oxygen is dangerous under pressure.
6. What is the primary reason to recover refrigerant from a system before
repair?
A) To reduce system noise
B) To comply with EPA regulations
C) To increase system efficiency
D) To prevent corrosion
*Correct answer: B) To comply with EPA regulations – EPA requires refrigerant
recovery to prevent ozone depletion and environmental harm.
7. Which component removes heat from the indoor air in a split system?
A) Compressor
B) Condenser coil
C) Evaporator coil
D) Expansion valve
*Correct answer: C) Evaporator coil – The evaporator coil absorbs heat from
indoor air and transfers it to the refrigerant.
8. Which of the following refrigerants is considered low GWP (Global Warming
Potential)?
, A) R-22
B) R-410A
C) R-32
D) R-134a
*Correct answer: C) R-32 – R-32 has a lower GWP compared to older HFC
refrigerants like R-410A and R-134a.
9. When charging a system with R-410A, which method is recommended?
A) Liquid charging only
B) Vapor charging only
C) Charging in any state is fine
D) Gravity charging
*Correct answer: B) Vapor charging only – R-410A is a high-pressure refrigerant
and must be charged as vapor to prevent liquid slugging.
10. What does the SEER rating measure in an air conditioning system?
A) Cooling capacity per hour
B) Seasonal energy efficiency
C) Electrical current draw
D) Refrigerant pressure
*Correct answer: B) Seasonal energy efficiency – SEER (Seasonal Energy Efficiency
Ratio) indicates the efficiency of a cooling system over a season.
11. Which pressure reading is typical on the low side of a residential R-22
system at 75°F ambient?
A) 50 psi
B) 120 psi
C) 200 psi
D) 300 psi
*Correct answer: A) 50 psi – Low-side pressures vary with temperature, but
around 50 psi is typical for R-22 at 75°F.
12. In Arizona, which HVAC system requires a licensed technician to perform
work?
A) Window air conditioners
B) Residential furnaces over 100,000 BTU
C) Portable AC units
Practice Questions (EPA 608 + State) 2026
Latest version Q&A |INSTANT DOWNLOAD
1. Which type of refrigerant is classified as a “Class I” under EPA regulations?
A) R-134a
B) R-22
C) R-12
D) R-410A
*Correct answer: C) R-12 – Class I refrigerants are chlorofluorocarbons (CFCs), like
R-12, with high ozone depletion potential.
2. What is the primary purpose of a TXV (Thermostatic Expansion Valve) in an
HVAC system?
A) To increase refrigerant pressure
B) To regulate refrigerant flow into the evaporator
C) To filter out contaminants
D) To measure system temperature
*Correct answer: B) To regulate refrigerant flow into the evaporator – TXVs
ensure the evaporator receives the proper amount of refrigerant based on load
conditions.
3. Which EPA certification type is required to service small appliances under 5
lbs of refrigerant?
A) Type I
B) Type II
C) Type III
D) Universal
*Correct answer: A) Type I – Type I certification covers servicing small appliances
containing 5 lbs or less of refrigerant.
,4. In Arizona, which license allows a technician to work on commercial HVAC
systems?
A) Class I HVAC
B) Class II HVAC
C) Restricted HVAC
D) Unrestricted HVAC
*Correct answer: D) Unrestricted HVAC – Unrestricted licenses allow service on all
HVAC systems, including commercial.
5. What is the safe pressure testing method for a system with R-410A
refrigerant?
A) Using compressed air
B) Using nitrogen with a pressure regulator
C) Using oxygen
D) Using water
*Correct answer: B) Using nitrogen with a pressure regulator – Nitrogen is inert
and safe for leak testing; oxygen is dangerous under pressure.
6. What is the primary reason to recover refrigerant from a system before
repair?
A) To reduce system noise
B) To comply with EPA regulations
C) To increase system efficiency
D) To prevent corrosion
*Correct answer: B) To comply with EPA regulations – EPA requires refrigerant
recovery to prevent ozone depletion and environmental harm.
7. Which component removes heat from the indoor air in a split system?
A) Compressor
B) Condenser coil
C) Evaporator coil
D) Expansion valve
*Correct answer: C) Evaporator coil – The evaporator coil absorbs heat from
indoor air and transfers it to the refrigerant.
8. Which of the following refrigerants is considered low GWP (Global Warming
Potential)?
, A) R-22
B) R-410A
C) R-32
D) R-134a
*Correct answer: C) R-32 – R-32 has a lower GWP compared to older HFC
refrigerants like R-410A and R-134a.
9. When charging a system with R-410A, which method is recommended?
A) Liquid charging only
B) Vapor charging only
C) Charging in any state is fine
D) Gravity charging
*Correct answer: B) Vapor charging only – R-410A is a high-pressure refrigerant
and must be charged as vapor to prevent liquid slugging.
10. What does the SEER rating measure in an air conditioning system?
A) Cooling capacity per hour
B) Seasonal energy efficiency
C) Electrical current draw
D) Refrigerant pressure
*Correct answer: B) Seasonal energy efficiency – SEER (Seasonal Energy Efficiency
Ratio) indicates the efficiency of a cooling system over a season.
11. Which pressure reading is typical on the low side of a residential R-22
system at 75°F ambient?
A) 50 psi
B) 120 psi
C) 200 psi
D) 300 psi
*Correct answer: A) 50 psi – Low-side pressures vary with temperature, but
around 50 psi is typical for R-22 at 75°F.
12. In Arizona, which HVAC system requires a licensed technician to perform
work?
A) Window air conditioners
B) Residential furnaces over 100,000 BTU
C) Portable AC units
