EPA 608

35. Before charging with liquid, how much pressure does an R-11 refrigeration system require (vapor pressure), and how much saturation temperature?

c. 16.9" hg. vacuum or 36 degrees F. Before charging with liquid, an R-11 refrigeration system requires a vapor pressure of 16.9" hg. vacuum, or a saturation temperature of 36° F. (Page 12 EPA prep manual)

28. What can be used to pressurize a system for the purpose of opening the system for a non-major repair?

c. Controlled hot water Controlled hot water can be used to pressurize a system for the purpose of opening the system for a non-major repair. (Page 12 EPA prep manual)

8. R-134A is a:

c. HFC Based on EPA's definition, R-134A is classified as a HFC. (Page 1 EPA's prep manual)

12. All equipment must be equipped with:

c. Low loss fittings that can be manually closed or close automatically when hose are disconnected to minimize the refrigerant loss. All equipment must be equipped with low loss fittings that can be manually closed, or close automatically, when hoses are disconnected to minimize the refrigerant loss. (Page 6 EPA prep manual)

9. Technicians servicing small appliances must be certified in refrigerant recovery if they:

c. Perform sealed system service. Technicians servicing small appliances except motor vehicle air conditioning (MVAC) must be certified in refrigerant recovery if they perform sealed system service. (Page 6 EPA prep manual)

18. The only way to measure refrigerant pressure temperature relationship accurately, is at a:

c. Stable, known temperature.

14. Before beginning a refrigerant recovery procedure, it is necessary to know:

c. The type of refrigerant that is in the system. Before beginning a refrigerant recovery procedure, it is necessary to know the type of refrigerant that is in the system. (Page 6 EPA prep manual)

33. Water must be circulated through the tubes when evacuating refrigerant in order to prevent _____________.

c. freezing of the water Water must be circulated through the tubes when evacuating refrigerant in order to prevent freezing the water. (Page 11 EPA prep manual)

29. A recovery unit's high pressure cut-out is set for:

a. 10 psig when evacuating the refrigerant from a low pressure chiller. A recovery unit's high pressure cut-out is set for 10 psig when evacuating the refrigerant from a low-pressure chiller and a rupture disc on a low-pressure recovery vessel relieves at 15 psig. (Page 11 EPA prep manual)

5. How many miles high is the stratosphere?

a. 10 to 30 The stratosphere is the Earth's security blanket. It is located between 7 and 30 miles above sea level and is comprised of, among other things, ozone. (Page 1 EPA's prep manual)

3. R-11 is a:

a. CFC Based on EPA's definition of CFC, R-11 is classified as a CFC. (Page 1 EPA's prep manual)

13. What is the EPA requirement for leak repair for small appliances?

a. Leaks should be repaired whenever possible. The EPA does not require leak repair for small appliances, but leaks should be repaired whenever possible. (Page 6 EPA prep manual)

24. It is necessary to frequently check and change the recycling machine's:

a. Oil and filter. Recovered refrigerants may contain acids, moisture, and oil. It is therefore necessary to frequently check and change both the oil and filter on a recycling machine. (Page 8 EPA prep manual)

22. After recovery, refrigerant may be:

a. Returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed. After recovery, refrigerant may be returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed, unless the appliance is an MVAC (Motor Vehicle Air Conditioner) like appliance. (Page 8 EPA prep manual)

26. A major repair involves removal of _____________.

a. an auxiliary heat exchanger coil. Under EPA regulations, a "major repair" means any maintenance, service or repair involving the removal of any or all of the following components: the compressor, the condenser, the evaporator or an auxiliary heat exchanger coil. (Page 9 EPA prep manual)

17. System-dependent (passive) recovery process for small appliances _____________.

a. captures refrigerant into a non-pressurized container or plastic bag. A system-dependent (passive) recovery process for small appliances captures refrigerant into a non-pressurized container. (Page 6 EPA prep manual)

11. Recovery equipment manufactured after November 15, 1993, must be __________.

a. certified by an EPA laboratory Recovery equipment manufactured after November 15, 1993, must be certified by an EPA approved testing laboratory, (example, U.L. or E.T.L) as capable of recovering 90% of the refrigerant if the compressor is operating, 80% of the refrigerant if the compressor is not operating, or achieving a 4 inch vacuum under the conditions of ARI 740. (Page 6 EPA prep manual)

34. Most low-pressure recovery machines utilize a water-cooled condenser that is connected to the _______________.

a. municipal water supply Most low-pressure recovery machines utilize a water-cooled condenser that is connected to the municipal water supply. (Page 11 EPA prep manual)

2. When a chlorine atom meets with an ozone molecule, it takes one ___________.

a. oxygen atom from the ozone When a chlorine atom meets with an ozone molecule, it takes one oxygen atom from the ozone. (Page 1 EPA's prep manual)

6. To take refrigerant out of a system, it must be _________.

a. recovered To remove refrigerant in any condition from a system and store it in an external container is to recover it. (Page 2 EPA's prep manual)

21. Although recovering refrigerant in the vapor phase will minimize the loss of oil, recovering as much as possible in the liquid phase will ___________.

a. reduce recovery time Although recovering refrigerant in the vapor phase will minimize the loss of oil, recovering as much as possible in the liquid phase can reduce recovery time. (Page 8 EPA prep manual)

1. The use and release of CFCs and HCFCs has a far reaching effect on ________.

a. the stratosphere The introduction of CFCs and HCFCs has dramatically changed our lifestyles. Little did we know that the use and release of these compounds into the atmosphere would have far reaching effects on our environment. The greatest effect is in the stratosphere, far removed from the Earth's surface. (Page 1 EPA's prep manual)

23. Disposable cylinders must be:

b. Discarded It is a violation of Section 608 to dispose of a disposable cylinder without first recovering any remaining refrigerant (to 0 psig.) and then rendering the cylinder useless, then recycling the metal. (Page 8 EPA prep manual)

32. Refrigerant recovery from a system using R-11 or R-123 starts with recovery of:

b. Liquid removal, followed by vapor. Refrigerant recovery from a system using R-11 or R-123 starts with liquid removal and is followed by vapor recovery. (Page 11 EPA prep manual)

10. The EPA definition of a small appliance includes:

b. Products manufactured, charged, and hermetically sealed in a factory with 5 pounds of refrigerant or less. The EPA definition of a small appliance includes products manufactured, charged, and hermetically sealed in a factory with five pounds of refrigerant or less. (Page 6 EPA prep manual)

27. Because a low-pressure system operates below atmospheric pressure (vacuum), leaks in the gasket or fittings will _____________.

b. cause air and moisture to enter the system The entire system must be above 70 degree for the refrigerant pressure in the unit to be at a positive pressure. Normal operation is with the low side approximately 15 inches of vacuum and the high at 8 psig. (Page 11& chart on page 19 EPA prep manual)

4. ODP is a measurement of CFCs and HCFCs ability to __________________.

b. destroy the ozone Ozone Depletion Potential (ODP) is a measurement of CFC's and HCFC's ability to destroy ozone. CFCs have been found in air samples taken from the stratosphere. The chlorine in these compounds is the culprit. (Page 1 EPA's prep manual)

19. After the installation of any type of system, the unit should first be ____________.

b. pressurized with an inert gas (nitrogen) and leak checked After the installation of any type of system, the unit should first be pressurized with nitrogen (an inert gas) and leak checked. In order to determine the general area of a leak use an electronic or ultrasonic leak detector. (Page 8 EPA prep manual)

16. Self-contained (active) recovery equipment has ______________.

b. to use its own compressor for recovery Self-contained (active) recovery equipment has its own means of removing refrigerant from appliances and is capable of reaching the required recovery rates whether or not the appliance compressor is operable. (Page 6 EPA prep manual)

30. A substantial amount of vapor will remain in the appliance after all the liquid is removed. An average 350 ton R-11 chiller at 0 psig still contains:

d. 100 pounds of vapor A substantial amount of vapor will remain in the appliance after all liquid is removed. For instance, an average 350 ton R-11 chiller at 0 psig still contains 100 lbs. of vapor after all the liquid has been removed. (Page 11 EPA prep manual)

31. When removing oil from a low-pressure system, a temperature of what must be attained?

d. 130 degrees F A temperature of 130° F should be attained when removing oil from a low-pressure system. Less refrigerant is contained in the oil at this higher temperature. (Page 11 EPA prep manual)

7. The body of a recovery cylinder must be in what color?

d. Gray Approved refrigerant recovery cylinders can easily be identified by their colors, YELLOW TOPS AND GRAY BODIES. (Page 4 EPA's prep manual)

20. When performing refrigerant system service on a unit that has a receiver/storage tank, refrigerant should be placed in the __________.

d. receiver/storage tank When performing refrigerant system service on a unit that has a receiver/storage tank, refrigerant should be placed in the receiver. (Page 8 EPA prep manual)

15. If a reclamation facility receives a tank of refrigerant, they will _____________.

d. refine to new refrigerant specifications RECLAIM is to process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis. RECLAIMED refrigerant must meet the standard set forth in ARI 700 before it can be resold. (Page 2 EPA prep manual)

25. Quick couplers, self-sealing hoses, and hand valves should be used to ________.

d. to minimize refrigerant release when hoses are connected/disconnected Quick couplers, self-sealing hoses, or hand valves should be used (as low loss fittings) to minimize refrigerant release when hoses are connected and disconnected. (Page 8 EPA prep manual)