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EPA Section 609 Motor Vehicle Air Conditioning (MVAC) Technician Certification
Practice mode
Question
1
of 25
QUESTION 1 / 25
To purchase refrigerant in containers larger than 2 pounds, a technician must show proof of:
Choose one answer below.
A
A state business license
✓
B
EPA Section 609 technician certification
✓
C
ASE A7 (Heating and Air Conditioning) certification
✓
D
A HVAC contractor license
✓
QUESTION 2 / 25
Which organization sets the equipment standards (SAE J2788) for MVAC refrigerant recovery machines?
Choose one answer below.
A
EPA (Environmental Protection Agency)
✓
B
SAE International (Society of Automotive Engineers)
✓
C
OSHA (Occupational Safety and Health Administration)
✓
D
NIST (National Institute of Standards and Technology)
✓
QUESTION 3 / 25
Recovery-only equipment (not recycling) for MVAC service recovers refrigerant into a cylinder that must then be:
Choose one answer below.
A
Immediately returned to the vehicle
✓
B
Sent to a refrigerant reclaimer for processing if it is to be used in other vehicles
✓
C
Filtered in-shop and stored for 30 days before reuse
✓
D
Mixed with fresh refrigerant in a 1:1 ratio
✓
QUESTION 4 / 25
Equipment certified to SAE J2788 for R-134a may be used for R-1234yf service:
Choose one answer below.
A
Yes, all HFC and HFO equipment is interchangeable
✓
B
No — R-1234yf requires separate dedicated equipment certified for that refrigerant
✓
C
Only if the machine is labeled 'universal'
✓
D
Yes, after adding a special adapter kit
✓
QUESTION 5 / 25
A shop must keep records of refrigerant purchases and recovery activities for a minimum of:
Choose one answer below.
A
6 months
✓
B
1 year
✓
C
3 years
✓
D
7 years
✓
QUESTION 6 / 25
Which is a valid EPA-approved testing format for Section 609 certification?
Choose one answer below.
A
Verbal exam administered by a shop manager
✓
B
Written or computer-based exam administered by an EPA-approved certification program
✓
C
On-the-job training sign-off by a senior technician
✓
D
Online self-assessment with self-grading
✓
QUESTION 7 / 25
Which tool is specifically designed to detect refrigerant leaks in an MVAC system?
Choose one answer below.
A
Manifold gauge set
✓
B
Electronic leak detector
✓
C
Vacuum pump
✓
D
Refrigerant identifier
✓
QUESTION 8 / 25
What does a manifold gauge reading of 0 psi on BOTH the high and low sides most likely indicate?
Choose one answer below.
A
The system is properly charged
✓
B
The compressor is functioning normally
✓
C
The system has lost all refrigerant charge
✓
D
The expansion valve is stuck open
✓
QUESTION 9 / 25
UV dye is injected into an MVAC system primarily to:
Choose one answer below.
A
Lubricate the compressor seals
✓
B
Identify refrigerant leaks under ultraviolet light
✓
C
Improve system cooling efficiency
✓
D
Neutralize moisture contamination
✓
QUESTION 10 / 25
An MVAC system that blows warm air while the compressor is running could indicate:
Choose one answer below.
A
Excessive refrigerant charge
✓
B
A refrigerant leak causing low charge
✓
C
A faulty blower motor resistor
✓
D
Incorrect blend door calibration
✓
QUESTION 11 / 25
Frost or ice forming on the orifice tube or expansion valve in an MVAC system usually signals:
Choose one answer below.
A
Normal refrigerant flow at high ambient temperatures
✓
B
A restriction or moisture contamination causing a pressure/temperature drop
✓
C
Overcharge of refrigerant
✓
D
A faulty condenser fan motor
✓
QUESTION 12 / 25
When using an electronic leak detector, the probe should be moved:
Choose one answer below.
A
Quickly across large areas to cover more ground
✓
B
Slowly along the bottom of hoses and fittings since refrigerant vapors are heavier than air
✓
C
Only around the compressor shaft seal
✓
D
Above all system components since refrigerant vapors rise
✓
QUESTION 13 / 25
Before performing a leak check on an MVAC system, the technician should first:
Choose one answer below.
A
Evacuate the system completely
✓
B
Run the A/C for several minutes to pressurize all components
✓
C
Add refrigerant until the system is fully charged
✓
D
Disable the compressor clutch relay
✓
QUESTION 14 / 25
What is the primary function of the compressor in an MVAC system?
Choose one answer below.
A
To cool the refrigerant by removing heat
✓
B
To pressurize refrigerant vapor and circulate it through the system
✓
C
To filter moisture from the refrigerant
✓
D
To regulate refrigerant flow into the evaporator
✓
QUESTION 15 / 25
Where does heat absorption (cooling of the vehicle cabin) occur in an MVAC system?
Choose one answer below.
A
Condenser
✓
B
Compressor
✓
C
Receiver-drier
✓
D
Evaporator
✓
QUESTION 16 / 25
What is the function of the condenser in an MVAC system?
Choose one answer below.
A
To evaporate liquid refrigerant inside the cabin
✓
B
To release heat from the refrigerant to the outside air
✓
C
To filter refrigerant contaminants
✓
D
To compress refrigerant vapor
✓
QUESTION 17 / 25
What device in an MVAC system controls the flow of refrigerant into the evaporator?
Choose one answer below.
A
Compressor clutch
✓
B
Thermal Expansion Valve (TXV) or Orifice Tube
✓
C
Receiver-drier
✓
D
Suction accumulator
✓
QUESTION 18 / 25
The high-pressure side of an MVAC system runs between which components?
Choose one answer below.
A
Evaporator outlet to compressor inlet
✓
B
Compressor outlet to evaporator inlet (through condenser)
✓
C
Receiver-drier to evaporator
✓
D
Compressor to accumulator
✓
QUESTION 19 / 25
What is the purpose of the receiver-drier (or accumulator) in an MVAC system?
Choose one answer below.
A
To compress refrigerant vapor
✓
B
To store liquid refrigerant and remove moisture and contaminants
✓
C
To measure system pressure
✓
D
To cool the cabin air directly
✓
QUESTION 20 / 25
Before opening any MVAC system for repairs, what must a technician do first?
Choose one answer below.
A
Check the system pressure
✓
B
Recover all refrigerant using approved equipment
✓
C
Add dye to locate leaks
✓
D
Replace the cabin air filter
✓
QUESTION 21 / 25
Recovery equipment for MVAC systems must be certified to which standard?
Choose one answer below.
A
SAE J2099
✓
B
SAE J2788
✓
C
UL 1973
✓
D
ANSI/ASHRAE 15
✓
QUESTION 22 / 25
What is the difference between 'recovery' and 'recycling' of refrigerant?
Choose one answer below.
A
They are the same process
✓
B
Recovery removes refrigerant from the system; recycling cleans it on-site for reuse
✓
C
Recycling is done at the factory; recovery is done in the field
✓
D
Recovery is illegal; only recycling is permitted
✓
QUESTION 23 / 25
What is 'reclaimed' refrigerant?
Choose one answer below.
A
Refrigerant filtered at the shop for immediate reuse
✓
B
Refrigerant sent to a certified facility and processed to meet AHRI 700 purity standards
✓
C
Refrigerant recovered from scrapped vehicles
✓
D
Any used refrigerant added back to a system
✓
QUESTION 24 / 25
Recovered refrigerant that is contaminated with moisture or other refrigerants should be:
Choose one answer below.
A
Vented safely outside the shop
✓
B
Sent to a certified reclaimer for processing
✓
C
Mixed with new refrigerant to dilute contamination
✓
D
Poured down the shop floor drain
✓
QUESTION 25 / 25
According to EPA Section 609, recovery equipment must remove what percentage of refrigerant from an MVAC system?
Choose one answer below.
A
At least 80%
✓
B
At least 90%
✓
C
At least 95%
✓
D
100% — no refrigerant may remain
✓
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