EPA Section 608 Universal Certification Exam
Practice Test Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which type of refrigerant is most commonly used in residential air
conditioning systems today?
a. R-11
b. R-12
c. R-410A
d. R-22
R-410A is the current standard for most new residential AC
systems due to its efficiency and non-ozone-depleting properties.
2. What is the primary purpose of a refrigerant in a cooling system?
a. To clean the coils
b. To provide lubrication
c. To absorb and transfer heat
d. To maintain airflow
Refrigerant absorbs heat from indoor air and releases it outdoors,
facilitating the cooling process.
3. Under EPA regulations, which technician certification is required
to work on small appliances containing refrigerants?
a. Type I
b. Type II
c. Type III
, d. Universal
The Universal certification allows technicians to work on all types
of equipment, including small appliances.
4. Which class of refrigerants is known to be ozone-depleting?
a. HFC
b. HC
c. CFC
d. HFO
CFCs (chlorofluorocarbons) deplete the ozone layer and are being
phased out under the Montreal Protocol.
5. What is the maximum safe pressure for recovering R-410A in a
system?
a. 200 psig
b. 350 psig
c. 500 psig
d. 700 psig
R-410A operates at higher pressures than older refrigerants, and
recovery equipment must be rated for its pressure.
6. Which method is used to check for leaks in a refrigerant system?
a. Pressure gauge only
b. Soap bubble solution or electronic leak detector
c. Thermometer
d. Flow meter
Soap bubbles or electronic detectors are effective ways to locate
leaks without releasing refrigerant.
7. What does the acronym “MVAC” stand for?
a. Mechanical Ventilation and Air Conditioning
, b. Motor Vehicle Air Conditioning
c. Multi-Vane Air Compressor
d. Maximum Velocity Airflow Control
MVAC refers specifically to air conditioning systems used in
vehicles.
8. When must a certified technician evacuate a system?
a. Only during installation
b. Only during repair
c. Whenever opening the system to the atmosphere
d. Evacuation is not required
Evacuation prevents moisture and air from contaminating the
refrigerant, ensuring system efficiency.
9. What is the first step in safely handling refrigerants?
a. Start the compressor
b. Identify the type of refrigerant
c. Check the thermostat
d. Charge the system
Knowing the refrigerant type ensures proper handling, recovery,
and compliance with EPA regulations.
10. What is an HFC refrigerant?
a. Ozone-depleting
b. Non-ozone-depleting
c. Combustible
d. Acidic
Hydrofluorocarbons (HFCs) do not contain chlorine and thus do not
deplete the ozone layer.
Practice Test Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which type of refrigerant is most commonly used in residential air
conditioning systems today?
a. R-11
b. R-12
c. R-410A
d. R-22
R-410A is the current standard for most new residential AC
systems due to its efficiency and non-ozone-depleting properties.
2. What is the primary purpose of a refrigerant in a cooling system?
a. To clean the coils
b. To provide lubrication
c. To absorb and transfer heat
d. To maintain airflow
Refrigerant absorbs heat from indoor air and releases it outdoors,
facilitating the cooling process.
3. Under EPA regulations, which technician certification is required
to work on small appliances containing refrigerants?
a. Type I
b. Type II
c. Type III
, d. Universal
The Universal certification allows technicians to work on all types
of equipment, including small appliances.
4. Which class of refrigerants is known to be ozone-depleting?
a. HFC
b. HC
c. CFC
d. HFO
CFCs (chlorofluorocarbons) deplete the ozone layer and are being
phased out under the Montreal Protocol.
5. What is the maximum safe pressure for recovering R-410A in a
system?
a. 200 psig
b. 350 psig
c. 500 psig
d. 700 psig
R-410A operates at higher pressures than older refrigerants, and
recovery equipment must be rated for its pressure.
6. Which method is used to check for leaks in a refrigerant system?
a. Pressure gauge only
b. Soap bubble solution or electronic leak detector
c. Thermometer
d. Flow meter
Soap bubbles or electronic detectors are effective ways to locate
leaks without releasing refrigerant.
7. What does the acronym “MVAC” stand for?
a. Mechanical Ventilation and Air Conditioning
, b. Motor Vehicle Air Conditioning
c. Multi-Vane Air Compressor
d. Maximum Velocity Airflow Control
MVAC refers specifically to air conditioning systems used in
vehicles.
8. When must a certified technician evacuate a system?
a. Only during installation
b. Only during repair
c. Whenever opening the system to the atmosphere
d. Evacuation is not required
Evacuation prevents moisture and air from contaminating the
refrigerant, ensuring system efficiency.
9. What is the first step in safely handling refrigerants?
a. Start the compressor
b. Identify the type of refrigerant
c. Check the thermostat
d. Charge the system
Knowing the refrigerant type ensures proper handling, recovery,
and compliance with EPA regulations.
10. What is an HFC refrigerant?
a. Ozone-depleting
b. Non-ozone-depleting
c. Combustible
d. Acidic
Hydrofluorocarbons (HFCs) do not contain chlorine and thus do not
deplete the ozone layer.
