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EPA 608 Type 2 Practice Exam Questions with Verified Answers

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Industrial process and refrigeration units with a 50 pound charge or more with an annualized leak rate of _____ or more must have leaks repaired. - Answer- 35 Unless plans are made to replace a system exceeding the maximum leak, repairs must be made in; - Answer- 30 days Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; - Answer- a 1 All Refrigeration & HVAC systems are protected by a; - Answer- pressure relief valve A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under; - Answer- ASHRAE Standard 15 Non-condensables will cause; - Answer- High discharge pressure A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of: - Answer- Low ambient temperature EPA regulations state that maintenance, service or repair involving the removal of the following component is a "major repair" - Answer- Pressure switch Which of the following refrigerants is an HCFC? - Answer- R-22 What can be done with the refrigerant trace gas and nitrogen after the leak is found? - Answer- Release to the atmosphere. High pressure appliances can be evacuated to atmospheric pressure (O psig) when; - Answer- There is a leak If a high pressure appliance containing 100 lbs. of an HCFC OTHER THAN R-22 refrigerant Recovery and/or Recycling equipment manufactured after November 15, 1993 must be evacuated to a level of; - Answer- 10 inches of vacuum When dehydrating a system it should be evacuated to a level of; - Answer- 500 Microns When recovering from a system with a refrigerant leak, recover to a level of; - Answer- 0 Psig When using a recovery system manufactured after November 15, 1993 on a system containing 100 lbs. of R-502 must be evacuated to; - Answer- 10 inches of Mercury If a high pressure appliance containing 210 lbs. of R-22 refrigerant Recovery and/or Recycling equipment manufactured before November 15, 1993 must be evacuated to a level of; - Answer- 4 inches of vacuum What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level? - Answer- a system with a large leak and system pressure of atmospheric A new split system should be checked for leaks by; - Answer- pressurizing the system with a few ounces of R-22 and an inert gas. An overcharged system will operate; - Answer- less efficiently. Refrigerant should be removed from the condenser outlet if the condenser is; - Answer- Below the receiver EPA regulations require that all Commercial and Industrial Process Refrigeration containing more than 50lbs. of refrigerant MUST be repaired when the annual leak rate exceeds; - Answer- 35% Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by; - Answer- EPA approved laboratory What happens to a refrigerant that is above the saturation temperature? - Answer- It remains in a vapor state. Which of the following refrigerant is considered high or very high pressure refrigerant? - Answer- HFC-134a Air conditioning system short cycling is normally caused by; - Answer- the system being oversized for the home

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