Type 1 Flashcards
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
At high temperatures R-12 and R-22 can decompose to form
Phosgene gas
which of the following refrigerants is the most commonly used as a replacement for r12 in household refrigerators
r134a
Recovery equipment used for the service or repair of small apliances must be certified by an EPA approved lab if the recovery equipment was manufactured after:
Nov. 15, 1993
what is the maximum allowable factory charge of a refrigerant for a Type 1 application
5 lbs
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-condensables in the cylinder
Recovery devices that were manufactured after Nov. 15, 1993 and are used for recovery of refrigerant from small appliances must be capable of =
recovering 90% of refrigerant when compressor is operating or achieving a 4 inch vacuum undr the conditions of Ari 740-1993
Solderless piercing valves should not remain installed on refrigeration systems after completion of repairs because:
they tend to break over time
whenever nitrogen is used to pressurize or blow debris our of the system
only nitrogen vapor should be used
what can cause excessive pressure on the high side of an active self-contained recovery device?
a closed recovery tank inlet valve or excessive air or other noncondensables in the recovery tank
portable refillable tanks or containers used to ship recovered refrigerants must meet what standards
Department of Transportation
A recovery cylinder which is half full of recovered R22 at normal room temp in the absence of noncondensables, will be pressurized to
130 psig
before beginning a refrigerant recovery procedure it is always necessary to
determine the type of refrigerant in the system
which of the following refrigerants must be recovered with equipment currently regulated by the equipment certification requirements of the epa under section 608
r12
in the event of a large release of r12 or r22 in a contained area, which of the following is true?
Self contained breathing apparatus or leaving the area is required
According to the Epa, which recovery equipment maintenance practices should be preformed on a regular basis?
check recovery device for any refrigerant leaks
small amounts of refrigerant have no odor therefore if a pungent odor is detected during a system recovery or repair
a compressor burnout has likely occured
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
Large spills of refrigerants can cause suffocation because
they are heavier than air and displace oxygen
Which of the following is not a Type 1 appliance?
an MVAC-like sytem that holds three pounds of R-12
when r-500 is recovered from an appliance, it
must be recovered in its own recovery vessel, not mixed with any other chemical
when you connect your service manifold to check system pressures, its always a good idea to:
use equipment such as hand valves or self-sealing hoses to minimize any release
EPA requires that all appliances must be equipped with a service aperture or other device that is used when adding or removing refrigerant from the appliance. For small appliances, this service port is typically:
a straight piece of tubing, called a Process Tube, that is entered using a piercing access valve
anyone who recovers refrigerant during the maintenance, repair, or service or a small appliance must be certified as either a Universal Technician or a:
Type 1 technician
