EPA 608 Type 1 Small Appliance– Practice Test 1

Correct answer is C:  phosgene gas.

At high temperatures (for example open flames and glowing metal surfaces) R-12 and R-22 can decompose to form phosgene gas.

NT Note:  Phosgene may also be produced during testing for leaks of older-style refrigerant gases. R-12 and R-22 were formerly leak-tested by a small gas torch with a sniffer tube and a copper reaction plate in the flame nozzle of the torch. If any refrigerant gas was leaking from a pipe or joint, the gas would be sucked into the flame through the sniffer tube and would cause a color change of the gas flame to a bright greenish blue. In the process, phosgene gas would be created due to the thermal reaction. No valid statistics are available, but reports suggest that numerous refrigeration technicians suffered the effects of phosgene poisoning due to their ignorance of the toxicity of phosgene, produced during such leak testing. Electronic sensing of refrigerant gases phased out the use of flame testing for leaks in the 1980s.

Correct answer is D:  it is the technicians responsibility to comply with any future changes in the law.

If the EPA regulations should change after a technician becomes certified it is the technicians responsibility to comply with any future changes in the law.

Correct answer is D:  R-134a

Which of the following refrigerants is most commonly used as a replacement for R-12 in new household refrigerators?   R-134a

Correct answer is D:  November 15 1993

Recovery equipment used for the service or repair of small appliances must be certified by an EPA-approved laboratory if the recovery equipment was manufactured after November 15 1993

Correct answer is B:  5 pounds

What is the maximum allowable factory charge of refrigerant for Type I appliances?   5 pounds

Correct answer is A:  The pressure reading along with a temperature reading can indicate if there is excessive air or other non-condensibles in the cylinder.

Why is it important to obtain an accurate pressure reading of refrigerant inside a recovery cylinder?  The pressure reading along with a temperature reading can indicate if there is excessive air or other non-condensibles in the cylinder.

Correct answer is A:  recovering 90% of the refrigerant when the compressor is operating or achieving a 4 inch vacuum under the conditions of ARI 740-1993.

Recovery devices that were manufactured after November 15 1993 and are used for the recovery of refrigerant from small appliances must be capable of recovering 90% of the refrigerant when the compressor is operating or achieving a 4 inch vacuum under the conditions of ARI 740-1993.

NT Note:  Recovery devices that were manufactured after November 15 1993 and are used for the recovery of refrigerant from small appliances MUST ALSO be capable of recovering 80% of the refrigerant in an appliance if the appliance’s compressor is INOPERATIVE .

Correct answer is B:  they tend to leak over time.

Solderless piercing valves should not remain installed on refrigeration systems after completion of repairs because they tend to leak over time.

Correct answer is A:  only nitrogen vapor should be used.

Whenever nitrogen is used to pressurize or blow debris out of a system, only nitrogen vapor should be used.

Correct answer is D:  Either A or B.

Two of the things that can cause excessive pressure on the high side of an active self-contained recovery device is:

• A closed recovery tank inlet valve, and excessive air.
• Noncondensibles in the recovery tank.

Correct answer is A:  Department of Transportation (DOT)

Portable refillable tanks or containers used to ship recovered refrigerants must meet what standard(s)?  Department of Transportation (DOT).

Correct answer is D:  130 psig.

A recovery cylinder which is half full of recovered R-22 at normal room temperature (about 75F), in the absence of non-condensables  will be pressurized to 130 psig.

Correct answer is B:  determine the type of refrigerant in the system.

Before beginning a refrigerant recovery procedure it is ALWAYS necessary to determine the type of refrigerant in the system.

Correct answer is D:  R-12

Which of the following refrigerants must be recovered with equipment currently regulated by the equipment certification requirements of the EPA under section 608?    R-12

Correct answer is B:  Self-contained breathing apparatus (SCBA) or leaving the area is required.

In the event of a large release of R-12 or R-22 in a contained area, which of the following is true?  Self-contained breathing apparatus (SCBA) or leaving the area is required.

Correct answer is A:  Check recovery device for refrigerant leaks.

According to the EPA which recovery equipment maintenance procedure(s) should be performed on a regular basis?  Check recovery device for refrigerant leaks.

Correct answer is C:  a compressor burnout has likely occurred.

Small amounts of refrigerant are odorless, so if a pungent odor is detected during a system recovery or repair, a compressor burnout has likely occurred.

Correct answer is D:  it is necessary to heat and strike the compressor with a rubber mallet.

When recovering refrigerant into a non-pressurized container from a refrigerator with an inoperative compressor it is necessary to heat and strike the compressor with a rubber mallet.

Correct answer is D:  they are heavier than air and displace the oxygen.

Large spills of refrigerants can cause suffocation because they are heavier than air and displace the oxygen.

Correct answer is A:   An MVAC system that holds three pounds of R-12.

Which of the following is not a Type I appliance?  An MVAC system that holds three pounds of R-12.

Note

An MVAC system, or Motor Vehicle Air Conditioning system, does not fall under requirements of EPA Section 608 certification. Instead it falls under EPA Section 609

Correct answer is D:  must be recovered into its own recovery vessel or a recovery cylinder that already contains R500.

When R-500 is recovered from an appliance it must be recovered into its own recovery vessel or a recovery cylinder that already contains R500.

Correct answer is B:  use equipment such as hand valves or self-sealing hoses to minimize any release.

When you connect a manifiold set to check system pressures, it is always a good idea to use equipment such as hand valves or self-sealing hoses to minimize any release.

Correct answer is A:  a straight piece of tubing called a Process Tube where the system can be entered using a piercing access valve.

The EPA requires that all appliances be equipped with a service aperture or other device to be used when adding or removing refrigerant from appliances. For small appliances this service port is typically a straight piece of tubing called a Process Tube where the system can be entered using a piercing access valve.

Correct answer is A:  Type I Technician

Anyone who recovers refrigerant during the maintenance, service or repair of small appliances must be certified as a Universal Technician or a Type I Technician

Correct answer is C:  either type of recovery unit.

EPA regulations require the capture of at least 80 percent of the refrigerant from a small appliance with a non-operating compressor if the technician is using either type of recovery unit.