EPA Section 608 Type III Certification
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Answers, Plus Explained
Rationales/Expert Verified For
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1. What type of refrigerants are primarily handled under Type III
certification?
A. High-pressure refrigerants
B. Low-pressure refrigerants
C. Very high-pressure refrigerants
D. All types of refrigerants
B. Low-pressure refrigerants
Type III certification covers low-pressure refrigerants, typically those
with a saturation pressure below 45 psia at 104°F, commonly used in
chillers.
2. Which refrigerant is an example of a low-pressure refrigerant?
A. R-134a
B. R-22
C. R-123
D. R-410A
,C. R-123
R-123 is a low-pressure refrigerant commonly used in large chillers,
making it relevant for Type III certification.
3. The pressure in a low-pressure system is measured in psig. What
is the maximum typical operating pressure for Type III systems?
A. 15 psig
B. 30 psig
C. 45 psig
D. 60 psig
C. 45 psig
Type III systems are defined as low-pressure, operating below 45 psig at
104°F.
4. Which tool is essential for checking leaks in low-pressure
systems?
A. Nitrogen regulator
B. Ultrasonic leak detector
C. Low-pressure manifold gauge set
D. Combustion analyzer
C. Low-pressure manifold gauge set
Type III systems require specialized low-pressure gauges to safely
measure operating pressures.
5. When recovering refrigerant from a Type III system, which
practice is correct?
A. Recover only to 0 psig
B. Recover to 10 inches of Hg vacuum
C. Recover as much as possible without exceeding safe vacuum
levels
D. Open the system to the atmosphere after partial recovery
,C. Recover as much as possible without exceeding safe vacuum levels
EPA regulations require maximum recovery without risking system
damage or refrigerant loss.
6. Why is it important to avoid high vacuum during recovery on low-
pressure systems?
A. It causes condensation of refrigerant
B. It can damage the compressor
C. It can freeze water in the system
D. All of the above
D. All of the above
Excessive vacuum can cause moisture to freeze, damage compressors,
and affect proper refrigerant recovery.
7. What type of equipment is prohibited when handling Type III
refrigerants?
A. Refrigerant recovery units designed for low-pressure
B. Hand pumps
C. Recovery units certified for high-pressure only
D. Vacuum pumps rated for low-pressure
C. Recovery units certified for high-pressure only
High-pressure equipment may not safely recover low-pressure
refrigerants, and using it violates EPA regulations.
8. Which refrigerant is considered both low-pressure and mildly
flammable?
A. R-123
B. R-134a
C. R-1233zd
D. R-410A
, C. R-1233zd
R-1233zd is a low-pressure, mildly flammable HFO used in chiller
systems.
9. EPA Type III certification is required for technicians servicing
which systems?
A. Domestic refrigerators
B. Window AC units
C. Industrial chillers
D. Residential heat pumps
C. Industrial chillers
Type III certification is specifically for low-pressure systems found in
industrial chillers.
10. When performing a repair on a Type III system, which PPE is
required?
A. None
B. Safety glasses and gloves
C. Respirator only
D. Fire-resistant suit
B. Safety glasses and gloves
EPA requires basic PPE to prevent exposure to refrigerants and system
oils.
11. What is the correct method to charge a low-pressure
system?
A. Liquid refrigerant into the high side
B. Gas refrigerant into the suction side
C. Liquid refrigerant into the low side
D. Any method is acceptable
Exam With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What type of refrigerants are primarily handled under Type III
certification?
A. High-pressure refrigerants
B. Low-pressure refrigerants
C. Very high-pressure refrigerants
D. All types of refrigerants
B. Low-pressure refrigerants
Type III certification covers low-pressure refrigerants, typically those
with a saturation pressure below 45 psia at 104°F, commonly used in
chillers.
2. Which refrigerant is an example of a low-pressure refrigerant?
A. R-134a
B. R-22
C. R-123
D. R-410A
,C. R-123
R-123 is a low-pressure refrigerant commonly used in large chillers,
making it relevant for Type III certification.
3. The pressure in a low-pressure system is measured in psig. What
is the maximum typical operating pressure for Type III systems?
A. 15 psig
B. 30 psig
C. 45 psig
D. 60 psig
C. 45 psig
Type III systems are defined as low-pressure, operating below 45 psig at
104°F.
4. Which tool is essential for checking leaks in low-pressure
systems?
A. Nitrogen regulator
B. Ultrasonic leak detector
C. Low-pressure manifold gauge set
D. Combustion analyzer
C. Low-pressure manifold gauge set
Type III systems require specialized low-pressure gauges to safely
measure operating pressures.
5. When recovering refrigerant from a Type III system, which
practice is correct?
A. Recover only to 0 psig
B. Recover to 10 inches of Hg vacuum
C. Recover as much as possible without exceeding safe vacuum
levels
D. Open the system to the atmosphere after partial recovery
,C. Recover as much as possible without exceeding safe vacuum levels
EPA regulations require maximum recovery without risking system
damage or refrigerant loss.
6. Why is it important to avoid high vacuum during recovery on low-
pressure systems?
A. It causes condensation of refrigerant
B. It can damage the compressor
C. It can freeze water in the system
D. All of the above
D. All of the above
Excessive vacuum can cause moisture to freeze, damage compressors,
and affect proper refrigerant recovery.
7. What type of equipment is prohibited when handling Type III
refrigerants?
A. Refrigerant recovery units designed for low-pressure
B. Hand pumps
C. Recovery units certified for high-pressure only
D. Vacuum pumps rated for low-pressure
C. Recovery units certified for high-pressure only
High-pressure equipment may not safely recover low-pressure
refrigerants, and using it violates EPA regulations.
8. Which refrigerant is considered both low-pressure and mildly
flammable?
A. R-123
B. R-134a
C. R-1233zd
D. R-410A
, C. R-1233zd
R-1233zd is a low-pressure, mildly flammable HFO used in chiller
systems.
9. EPA Type III certification is required for technicians servicing
which systems?
A. Domestic refrigerators
B. Window AC units
C. Industrial chillers
D. Residential heat pumps
C. Industrial chillers
Type III certification is specifically for low-pressure systems found in
industrial chillers.
10. When performing a repair on a Type III system, which PPE is
required?
A. None
B. Safety glasses and gloves
C. Respirator only
D. Fire-resistant suit
B. Safety glasses and gloves
EPA requires basic PPE to prevent exposure to refrigerants and system
oils.
11. What is the correct method to charge a low-pressure
system?
A. Liquid refrigerant into the high side
B. Gas refrigerant into the suction side
C. Liquid refrigerant into the low side
D. Any method is acceptable
