HVAC EPA Exam – Core 52 Questions with Correct Answers An ozone molecule consists of - Correct Answer 3 oxygen atoms
Depletion of Ozone in the stratosphere causes: - Correct Answer 1. Crop loss
- Increase in eye disease
- Skin cancer
- Reduced marine life
- Deforestation
- Increased ground level ozone
When released into the atmosphere deplete the Ozone layer - Correct Answer CFC and HFC What happens when a chlorine atom meets with an Ozone molecule? - Correct Answer it takes 1 oxygen atom away from the Ozone, forming Chlorine Monoxide ___ chlorine atom can destroy ________ ozone molecules - Correct Answer one chlorine; 100,000 Ozone molecules the chlorine in CFC's will neither dissolve in water nor - Correct Answer break down into compounds that dissolve in water measurement of CFC's and HCFC's ability to destroy ozone is - Correct Answer Ozone Depletion Potential the compound gauge (blue) and the high pressure gauge (red) are connected to the manifold - Correct Answer the manifold is connected by hoses to access ports to measure system pressures EPA regulations require that hoses be equipped with - Correct Answer low loss fittings that will minimize refrigerant loss when hoses are disconnected 1 / 2
(1) the metering device causes a reduction in pressure, and therefore.. - Correct Answer a reduction in saturation temperature (2) Heat is absorbed in the evaporator and causes the refrigerator to - Correct Answer boil from liquid to vapor (3)at the outlet of the evaporator, the refrigerant is now a - Correct Answer low temperature, low pressure vapor (4) refrigerant vapor travels to the inlet of the compressor, the refrigerant vapor is then - Correct Answer compressed and moves the condenser (5) as the refrigerant expels heat, - Correct Answer the refrigerant condenses to a liquid A system that uses a thermostatic expansion valve is usually equipped with a(n) ________, which would be located in the liquid line directly following the condenser - Correct Answer receiver a system that uses a capillary tube or fixed bore metering device is usually equipped with a(n) ________, which would be located in the suction line directly following the evaporator - Correct Answer accumulator Violation of EPA section 608 of the Federal Clean Air Act includes: - Correct Answer $27,500* per day, per violation; bounty of up to $10,000 to lure your competitors, customers and workers to turn you in service technicians who violate the Clean Air Act provisions may be fined, lose their certification, and may be required to appear in Federal Court Violations of Section 608 will be on the practice test - Correct Answer ...Montreal Protocol - Correct Answer International treaty regulating the production/use of CFC's, HCFC's, halons, methyl chloroform and carbon tetrachloride entered into force in mid 1989
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