EPA SECTION 609 CERTIFICATION EXAM: 200 PRACTICE QUESTIONS WITH ANSWERS & RATIONALES

EPA SECTION 609 CERTIFICATION EXAM: 200 PRACTICE QUESTIONS WITH ANSWERS & RATIONALES 1. A refillable refrigerant cylinder must not be filled above ______ of its full capacity. A) 60% B) 80% C) 90% D) 100% Correct Answer: B) 80% Rationale: Safety regulations mandate that refillable cylinders are not filled beyond 80% to allow for thermal expansion and prevent rupture. ________________________________________ 2. Ozone layer absorbs and scatters ______ from the sun. A) Infrared light B) Ultraviolet light C) Visible light D) Radio waves Correct Answer: B) Ultraviolet light Rationale: The ozone layer is crucial for absorbing and scattering harmful ultraviolet (UV) radiation from the sun. ________________________________________ 3. An award of up to ______ may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting. A) $1,000 B) $5,000 C) $10,000 D) $25,000 **Correct Answer: C) $10,000** *Rationale:* The EPA provides a reward of up to $10,000 for information leading to penalties against illegal venting. ________________________________________ 4. Since ______, it is no longer legal for CFCs to be manufactured or imported into the United States. A) Jan 1, 1990 B) Jan 1, 1995 C) Jan 1, 1996 D) Nov 15, 1995 Correct Answer: C) Jan 1, 1996 Rationale: The production and import of CFCs were banned in the U.S. effective January 1, 1996. ________________________________________ 5. R-134a is a chlorine-free refrigerant. A) True B) False Correct Answer: A) True Rationale: R-134a is a hydrofluorocarbon (HFC) and does not contain chlorine, making it ozone-friendly. ________________________________________ 6. MVAC systems being disposed must be evacuated to ______ of mercury before being scrapped. A) 2 inches B) 3 inches C) 4 inches D) 5 inches Correct Answer: C) 4 inches Rationale: Mobile Vehicle Air Conditioning (MVAC) systems must be evacuated to 4 inches of mercury vacuum before disposal. ________________________________________ 7. Ozone at ground level and at Stratosphere is a harmful pollutant. A) True B) False Correct Answer: B) False Rationale: Ground-level ozone is a pollutant, but stratospheric ozone is beneficial as it blocks UV radiation. ________________________________________ 8. Each chlorine ion can destroy ______ ozone molecules. A) 1,000 B) 10,000 C) 100,000 D) 1,000,000 Correct Answer: C) 100,000 Rationale: A single chlorine atom can catalyze the destruction of up to 100,000 ozone molecules. ________________________________________ 9. Since ______, it is illegal to vent substitutes for CFC and HCFC refrigerants. A) Jan 1, 1990 B) Nov 15, 1995 C) Jan 1, 1996 D) July 1, 1992 Correct Answer: B) Nov 15, 1995 Rationale: The EPA banned venting of substitutes for CFCs and HCFCs starting November 15, 1995. ________________________________________ 10. For determining the Ozone Depletion Potential ______ having been assigned a factor of 1. A) CFC-12 B) CFC-11 C) HCFC-22 D) HFC-134a Correct Answer: B) CFC-11 Rationale: CFC-11 is the reference substance with an ODP of 1.0. ________________________________________ 11. Ester-based synthetic oils can be mixed with other oils. A) True B) False Correct Answer: B) False Rationale: Ester oils (POE) should not be mixed with mineral or alkylbenzene oils as it can cause breakdown and system failure.