Safety & Environmental Practices Flashcards
6 cards from real EPA 609 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Safety & Environmental Practices flashcards as text
Ozone in the stratosphere protects the Earth by:
Answer: Absorbing harmful ultraviolet (UV-B and UV-C) radiation
Stratospheric ozone absorbs UV-B and UV-C radiation, preventing it from reaching Earth's surface where it causes skin cancer, cataracts, and ecosystem damage.
Chlorine atoms from CFCs destroy ozone through what type of reaction?
Answer: A catalytic chain reaction where one chlorine atom can destroy thousands of ozone molecules
A single chlorine atom acts as a catalyst and can destroy up to 100,000 ozone molecules before it is neutralized.
The 'ozone hole' phenomenon primarily affects which region of the planet?
Answer: The Antarctic (South Pole) region
The ozone hole was first discovered over Antarctica, where polar stratospheric clouds create conditions that accelerate ozone destruction.
What is the 'de minimis' exemption in EPA refrigerant regulations?
Answer: A very small refrigerant release unavoidable during good-faith repair work is not considered venting
The de minimis exemption recognizes that small, unavoidable refrigerant releases during normal repair operations in good faith are not violations.
How should a technician dispose of used refrigerant oil drained from an MVAC system?
Answer: Dispose of it as hazardous waste through a licensed waste handler
Refrigerant-contaminated PAG oil is hazardous waste and must be handled by a licensed waste disposal service — it cannot be reused or dumped.
What does SNAP stand for in the context of EPA refrigerant regulations?
Answer: Significant New Alternatives Policy
SNAP (Significant New Alternatives Policy) is the EPA program that evaluates and approves substitute refrigerants to ensure they are safe alternatives to ozone-depleting substances.