MACS 609 CERTIFICATION EXAM QUESTIONS & ANSWERS CORRECT 100%

MACS 609 CERTIFICATION EXAM
QUESTIONS & ANSWERS CORRECT
100%
Course
MACS 609
1. What is the primary legal requirement before purchasing MVAC refrigerant?
A. ASE certification
B. EPA Section 609 certification
C. State mechanic license
D. OSHA training
Answer: B


2. What is the environmental risk of venting refrigerant?
A. Engine damage
B. Ozone depletion and global warming
C. Battery drain
D. Fuel contamination
Answer: B


3. Which refrigerant replaced R-12 in most vehicles?
A. R-22
B. R-134a
C. R-410A
D. R-717
Answer: B


4. What tool removes refrigerant from MVAC systems?
A. Vacuum pump
B. Recovery machine
C. Manifold gauge
D. Compressor tester

, Answer: B


5. What must be done before opening a refrigerant system?
A. Add oil
B. Recover refrigerant
C. Flush coolant
D. Increase pressure
Answer: B


6. What is the purpose of system evacuation?
A. Add refrigerant
B. Remove air and moisture
C. Increase RPM
D. Add dye
Answer: B


7. Which refrigerant is mildly flammable (A2L)?
A. R-134a
B. R-1234yf
C. R-12
D. R-22
Answer: B


8. What symptom indicates low refrigerant charge?
A. High pressure
B. Poor cooling
C. Engine knock
D. High RPM
Answer: B


9. What does the compressor do?