EPA Section 608 Type III Certification
Exam Practice Questions And Correct
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Rationales 2027 Q&A | Instant
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1. What type of refrigeration equipment is primarily covered by the EPA
Section 608 Type III certification?
A. Small appliances containing less than five pounds of refrigerant
B. Motor vehicle air-conditioning systems
C. Low-pressure appliances
D. High-pressure industrial refrigeration systems
Rationale: Type III certification is specifically designed for technicians who
service or dispose of low-pressure refrigeration appliances, such as
centrifugal chillers that commonly use low-pressure refrigerants.
2. Which refrigerant is commonly associated with low-pressure
centrifugal chillers?
,A. R-404A
B. R-410A
C. R-123
D. R-22
Rationale: R-123 has historically been widely used in low-pressure
centrifugal chillers, although newer refrigerants and alternative
technologies are increasingly used.
3. In a low-pressure refrigeration system, the evaporator typically
operates at:
A. A pressure substantially above atmospheric pressure
B. A pressure below atmospheric pressure
C. Exactly atmospheric pressure
D. The same pressure as the condenser
Rationale: Many low-pressure chillers operate with evaporator pressures
below atmospheric pressure, which creates the possibility of air and
moisture entering through leaks.
4. Why is dehydration particularly important when servicing a low-
pressure refrigeration system?
A. Moisture increases compressor displacement
B. Moisture increases refrigerant pressure
,C. Moisture can freeze at low evaporator temperatures and contribute to
corrosion and acid formation
D. Moisture improves heat transfer
Rationale: Moisture can freeze in low-temperature areas and can also
contribute to corrosion, chemical reactions, and system contamination.
5. What is the primary environmental concern associated with releasing
many regulated refrigerants into the atmosphere?
A. Increased oxygen concentration
B. Increased atmospheric pressure
C. Ozone depletion and/or contribution to climate change, depending on
the refrigerant
D. Increased nitrogen concentration
Rationale: Certain refrigerants contain ozone-depleting substances, while
many others are greenhouse gases that contribute to climate change.
6. Which condition can cause air and other noncondensables to enter a
low-pressure chiller?
A. Excessive condenser pressure
B. A leak while the system is operating below atmospheric pressure
C. Excessive refrigerant charge
D. A clean condenser coil
, Rationale: If portions of a low-pressure system operate below atmospheric
pressure, a leak can allow surrounding air and moisture to enter rather
than refrigerant escaping outward.
7. What is a major consequence of noncondensable gases in a
refrigeration system?
A. Lower compressor discharge temperature in every situation
B. Increased evaporator efficiency
C. Increased condensing pressure and reduced system efficiency
D. Elimination of moisture
Rationale: Noncondensables accumulate in the condenser and interfere
with heat transfer, increasing condensing pressure and reducing efficiency.
8. Before opening a low-pressure refrigeration system for major service,
what should the technician generally do?
A. Add refrigerant until the system reaches maximum pressure
B. Vent the refrigerant to atmosphere
C. Recover the refrigerant in accordance with applicable EPA requirements
D. Add compressed air to the system
Rationale: Refrigerant must be properly recovered rather than
intentionally released, and the technician must follow applicable EPA
recovery requirements.
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1. What type of refrigeration equipment is primarily covered by the EPA
Section 608 Type III certification?
A. Small appliances containing less than five pounds of refrigerant
B. Motor vehicle air-conditioning systems
C. Low-pressure appliances
D. High-pressure industrial refrigeration systems
Rationale: Type III certification is specifically designed for technicians who
service or dispose of low-pressure refrigeration appliances, such as
centrifugal chillers that commonly use low-pressure refrigerants.
2. Which refrigerant is commonly associated with low-pressure
centrifugal chillers?
,A. R-404A
B. R-410A
C. R-123
D. R-22
Rationale: R-123 has historically been widely used in low-pressure
centrifugal chillers, although newer refrigerants and alternative
technologies are increasingly used.
3. In a low-pressure refrigeration system, the evaporator typically
operates at:
A. A pressure substantially above atmospheric pressure
B. A pressure below atmospheric pressure
C. Exactly atmospheric pressure
D. The same pressure as the condenser
Rationale: Many low-pressure chillers operate with evaporator pressures
below atmospheric pressure, which creates the possibility of air and
moisture entering through leaks.
4. Why is dehydration particularly important when servicing a low-
pressure refrigeration system?
A. Moisture increases compressor displacement
B. Moisture increases refrigerant pressure
,C. Moisture can freeze at low evaporator temperatures and contribute to
corrosion and acid formation
D. Moisture improves heat transfer
Rationale: Moisture can freeze in low-temperature areas and can also
contribute to corrosion, chemical reactions, and system contamination.
5. What is the primary environmental concern associated with releasing
many regulated refrigerants into the atmosphere?
A. Increased oxygen concentration
B. Increased atmospheric pressure
C. Ozone depletion and/or contribution to climate change, depending on
the refrigerant
D. Increased nitrogen concentration
Rationale: Certain refrigerants contain ozone-depleting substances, while
many others are greenhouse gases that contribute to climate change.
6. Which condition can cause air and other noncondensables to enter a
low-pressure chiller?
A. Excessive condenser pressure
B. A leak while the system is operating below atmospheric pressure
C. Excessive refrigerant charge
D. A clean condenser coil
, Rationale: If portions of a low-pressure system operate below atmospheric
pressure, a leak can allow surrounding air and moisture to enter rather
than refrigerant escaping outward.
7. What is a major consequence of noncondensable gases in a
refrigeration system?
A. Lower compressor discharge temperature in every situation
B. Increased evaporator efficiency
C. Increased condensing pressure and reduced system efficiency
D. Elimination of moisture
Rationale: Noncondensables accumulate in the condenser and interfere
with heat transfer, increasing condensing pressure and reducing efficiency.
8. Before opening a low-pressure refrigeration system for major service,
what should the technician generally do?
A. Add refrigerant until the system reaches maximum pressure
B. Vent the refrigerant to atmosphere
C. Recover the refrigerant in accordance with applicable EPA requirements
D. Add compressed air to the system
Rationale: Refrigerant must be properly recovered rather than
intentionally released, and the technician must follow applicable EPA
recovery requirements.
