EPA Section 608 Technician Certification Exam
– 2026 Practice and Preparation Guide
Question 1
Which refrigerant has the highest ozone depletion potential (ODP)?
A. R-134a
B. R-410A
C. R-22
D. R-717
Correct Answer: C
R-22 is an HCFC with measurable ozone depletion potential, unlike
HFCs and natural refrigerants.
Question 2
What document must technicians maintain to prove EPA Section 608
certification?
A. EPA registration card
B. Employer-issued license
C. Certification card
D. Equipment service log
Correct Answer: C
EPA-certified technicians are required to carry proof of certification in
the form of a certification card.
,Question 3
What refrigerant is classified as an HFC?
A. R-12
B. R-22
C. R-134a
D. R-11
Correct Answer: C
R-134a is an HFC and does not deplete ozone, unlike CFCs and HCFCs.
Question 4
Which substance is primarily responsible for ozone depletion?
A. Carbon dioxide
B. Chlorine
C. Nitrogen
D. Hydrogen
Correct Answer: B
Chlorine atoms released from CFCs and HCFCs destroy ozone
molecules in the stratosphere.
Question 5
What is the maximum allowable leak rate for commercial refrigeration
equipment?
A. 10% per year
B. 20% per year
,C. 30% per year
D. 35% per year
Correct Answer: D
EPA regulations allow a maximum leak rate of 35% annually for
commercial refrigeration equipment.
Question 6
Which refrigerant is banned from production in the U.S.?
A. R-22
B. R-134a
C. R-410A
D. R-404A
Correct Answer: A
Production of R-22 has been phased out under the Clean Air Act due to
ozone depletion.
Question 7
Which type of EPA Section 608 certification allows servicing all
systems?
A. Type I
B. Type II
C. Type III
D. Universal
, Correct Answer: D
Universal certification permits technicians to service all types of
refrigeration and air-conditioning equipment.
Question 8
Which system typically operates under a vacuum during normal
operation?
A. High-pressure system
B. Low-pressure chiller
C. Split-system AC
D. Heat pump
Correct Answer: B
Low-pressure chillers often operate below atmospheric pressure,
increasing air and moisture infiltration risks.
Question 9
What safety device protects against excessive system pressure?
A. Filter-drier
B. Sight glass
C. Pressure relief valve
D. Receiver
Correct Answer: C
Pressure relief valves prevent system rupture by releasing excess
pressure.
– 2026 Practice and Preparation Guide
Question 1
Which refrigerant has the highest ozone depletion potential (ODP)?
A. R-134a
B. R-410A
C. R-22
D. R-717
Correct Answer: C
R-22 is an HCFC with measurable ozone depletion potential, unlike
HFCs and natural refrigerants.
Question 2
What document must technicians maintain to prove EPA Section 608
certification?
A. EPA registration card
B. Employer-issued license
C. Certification card
D. Equipment service log
Correct Answer: C
EPA-certified technicians are required to carry proof of certification in
the form of a certification card.
,Question 3
What refrigerant is classified as an HFC?
A. R-12
B. R-22
C. R-134a
D. R-11
Correct Answer: C
R-134a is an HFC and does not deplete ozone, unlike CFCs and HCFCs.
Question 4
Which substance is primarily responsible for ozone depletion?
A. Carbon dioxide
B. Chlorine
C. Nitrogen
D. Hydrogen
Correct Answer: B
Chlorine atoms released from CFCs and HCFCs destroy ozone
molecules in the stratosphere.
Question 5
What is the maximum allowable leak rate for commercial refrigeration
equipment?
A. 10% per year
B. 20% per year
,C. 30% per year
D. 35% per year
Correct Answer: D
EPA regulations allow a maximum leak rate of 35% annually for
commercial refrigeration equipment.
Question 6
Which refrigerant is banned from production in the U.S.?
A. R-22
B. R-134a
C. R-410A
D. R-404A
Correct Answer: A
Production of R-22 has been phased out under the Clean Air Act due to
ozone depletion.
Question 7
Which type of EPA Section 608 certification allows servicing all
systems?
A. Type I
B. Type II
C. Type III
D. Universal
, Correct Answer: D
Universal certification permits technicians to service all types of
refrigeration and air-conditioning equipment.
Question 8
Which system typically operates under a vacuum during normal
operation?
A. High-pressure system
B. Low-pressure chiller
C. Split-system AC
D. Heat pump
Correct Answer: B
Low-pressure chillers often operate below atmospheric pressure,
increasing air and moisture infiltration risks.
Question 9
What safety device protects against excessive system pressure?
A. Filter-drier
B. Sight glass
C. Pressure relief valve
D. Receiver
Correct Answer: C
Pressure relief valves prevent system rupture by releasing excess
pressure.
