Epa Section 609 Exam Questions Accurate And Verified Actual Exam Questions With Detailed Answers For Guaranteed Pass | Already Graded A

1. With the rising cost of refrigerant, the value of the refrigerant stored in a 50-lb. recovery tank is worth how many times the cost of the recovery tank? A. Equal to the tank B. 2x the tank cost C. 5x the tank cost D. 10x the tank cost Rationale: The refrigerant inside a recovery tank is often more valuable than the tank itself—up to 5 times its cost due to rising refrigerant prices. 2. R-134a is a corrosive refrigerant: A. True B. False Rationale: R-134a is non-corrosive and widely used in automotive A/C systems. 3. Used cylinders can be recycled with other scrap metal: A. True B. False Rationale: If emptied and properly depressurized, used cylinders may be recycled like other scrap metal. 4. Refrigeration cylinders must be re-tested at what intervals? A. Every 3 years B. Every 7 years C. Every 10 years D. Every 5 years Rationale: DOT regulations require re-testing of refrigerant cylinders every five years to ensure safety. 5. Persons servicing MVACs must be certified as what if performing the service for compensation? A. Section 608 technicians B. HVAC contractors C. Universal technicians D. Section 609 MVAC technicians Rationale: Section 609 certification is mandatory for servicing MVAC systems for compensation. 6. Ozone in the stratosphere is created when UV light strikes which molecules? A. Nitrogen B. Water vapor C. Oxygen D. Carbon dioxide Rationale: Ozone (O₃) forms when UV light splits O₂ molecules, allowing single atoms to bond with other O₂ molecules. 7. The AHRI standard now limits unsaturated impurities in HFC-134a to what maximum level? A. 25 PPM B. 35 PPM C. 50 PPM D. 40 PPM Rationale: AHRI mandates no more than 40 parts per million of unsaturated impurities in HFC134a. 8. Refrigerants may be mixed in recovery cylinders: A. True B. False Rationale: EPA regulations prohibit mixing refrigerants during recovery to avoid contamination and disposal issues. 9. After reaching the required recovery vacuum, if system pressure rises, what might that indicate? A. System is clean B. Leak, liquid refrigerant, or oil-trapped gas C. Pressure gauge failure D. Vacuum pump efficiency Rationale: A pressure rise may indicate trapped refrigerant or a system leak. 10. Most halogenated compounds will decompose at room temperature: A. True B. False Rationale: Halogenated compounds like CFCs are stable and do not decompose at room temperature. 11. HFC-152a MVAC systems must be designed to avoid cabin concentrations above what level for over 15 seconds? A. 2.5% B. 3.7% C. 4.2% D. 5.5% Rationale: Exposure limits for flammable refrigerants like HFC-152a are strictly regulated to 3.7% max. 12. Empty refillable refrigerant tanks must be evacuated to a vacuum of: A. 20 inches of Hg B. 25 inches of Hg C. 27 inches of Hg D. 29 inches of Hg Rationale: To prevent atmospheric contamination, tanks must be evacuated to at least 27 inches of mercury. 13. The pressure in a refrigerant cylinder with one ounce of liquid refrigerant is: A. Half that of a full cylinder B. Higher C. Lower D. Exactly the same as a full cylinder Rationale: Vapor pressure depends on temperature, not the amount of liquid refrigerant present. 14. EPA requires a leak to be repaired prior to recharging an MVAC system: A. True B. False Rationale: Unlike stationary systems, EPA does not require leak repair before recharging MVAC systems. 15. A refillable refrigerant cylinder must not be filled above what percent of its capacity? A. 70% B. 80% C. 85% D. 100% Rationale: Filling beyond 80% could cause dangerous pressure buildup. 16. The ozone layer absorbs and scatters what type of solar radiation? A. Infrared B. Visible light C. Ultraviolet light D. Gamma rays Rationale: The ozone layer shields life from harmful UV radiation. 17. A person providing info that leads to a penalty for venting can receive up to: A. $1,000 B. $5,000 C. $10,000 D. $20,000 Rationale: EPA may award up to $10,000 for info leading to enforcement action. 18. Since when has it been illegal to manufacture or import CFCs into the U.S.? A. Jan 1, 1990 B. Jan 1, 1993 C. Jan 1, 1996 D. Jan 1, 2000 Rationale: Under the Montreal Protocol, CFC production/import was banned in the U.S. starting 1996. 19. R-134a is a chlorine-free refrigerant: A. True B. False Rationale: R-134a contains fluorine and hydrogen but no ozone-depleting chlorine. 20. MVAC systems being disposed must be evacuated to how many inches of mercury? A. 2 inches B. 3 inches C. 4 inches D. 5 inches Rationale: Systems must be evacuated to 4 inches Hg before disposal to prevent emissions. 21. Ozone at ground level is a harmful pollutant, but in the stratosphere, it is: A. Harmful B. Beneficial C. Useless D. Hazardous Rationale: Ground-level ozone harms health, but stratospheric ozone protects from UV rays. 22. Each chlorine atom can destroy how many ozone molecules? A. 100 B. 1,000 C. 10,000 D. 100,000 Rationale: A single chlorine ion from CFCs can catalytically destroy up to 100,000 ozone molecules. 23. Since when has it been illegal to vent substitutes for CFC and HCFC refrigerants? A. Nov 15, 1993 B. Nov 15, 1994 C. Nov 15, 1995 D. Nov 15, 1996 Rationale: As of Nov 15, 1995, EPA prohibits venting substitute refrigerants as well. 24. Which compound has an Ozone Depletion Potential (ODP) of 1.0? A. CFC-11 B. HFC-134a C. HCFC-22 D. CO₂ Rationale: CFC-11 is the reference standard for measuring ODP.