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
Epa Regulations require the capture of at least 80% of the refrigerant from a small appliance with a non-operating compressor if the technician is using
a self-contained (active) recovery unit or a system dependent (passive)recovery unit
technicians who preform sealed system service on small appliances must have
type 1 or universal certification
A small appliance defined by the Epa is:
appliances manufactured, charged, and hermetically sealed in a factory with 5lbs or less of refrigerant
Type 1 certification is required for:
persons handling refrigerant during maintenence, service, or repair of small appliances
If regulations change after the technician becomes certified:
the technician is responsible for complying with any future changes in the regulations
recovery equipment manufactured after Nov. 15,1993 must be:
Certified by an Epa approved testing laboratory
which of the following is true of small appliances refrigerant leaks?
Epa does not require repair, but leaks should be repaired whenever possible
Recovery equipment manufactured after Nov. 15 1993 must be capable of recovering?
90% refrigerant or a 4 inch vacuum
Recovering multiple types of refrigerants in the same cylinder
will make the reclaimed refrigerants non reclaimable and a charge for disposal may be levied
Self contained or active recovery
has its own means of recovery
system dependent or passive recovery equipment
captures refrigerant into a non-pressurized container with assistance of the appliance compressor
what is defined as non-condensable
moisture
when using a system dependent recovery system on an appliance that has an operating compressor, the technician should,
run the compressor and recover form the high side of the system
when using a system dependent recovery system on an appliance that has a non-operating system, the technician should
place access fitting on both the low and the high side of the system
system-dependent devices may only be used on appliances containing
15 lbs of refrigerants or less
small appliances are equipped with a straight piece of tubing (processing tube) used to
install a piercing type access valve fitting
if a strong odor is detected while preforming the recovery process
a compressor burnout has likely occured
after the refrigerant has been recovered, which of the following can be used to flush the system?
nitrogen
when filling a charging cylinder with a regulated refrigerant
The refrigerant vapor that is vented off the top of cylinder must be recovered
if after installing a fitting for the purpose of recovering the appliances refrigerant, you find that the system pressure is 0 psig
do not begin the recovery process
applying heat to the compressor with a heat gun…
can help remove trapped refrigerant liquid during recovery
refrigerators in the 1950’s and earlier may have used what refrigerants? (recovery not required)
Contain Methyl Formate, Methyl Chloride, or Sulfur Dioxide as a refrigerant
small appliances in the recreational vehicles may use refrigerants such as Ammonia, Hydrogen, or water, and therefore;
should not be recovered
recovery equipment manufactured before Nov. 15, 1993 must be capable of recovering
Must be capable of removing 80% of the refrigerant or a 4 inch vacuum
When pressurizing a system with nitrogen you should
charge through a pressure regulator and place a relief valve in the downstream line from the pressure regulator
after recovering a refrigerant, the nitrogen used to flush the system may be
legally vented
a passive system dependent recovery device for small appliances
captures refrigerant in a non-pressurized container
The sale of cfc and hcfc refrigerants is
restricted to technicians who are epa certified in refrigerant recovery
when using any equipment or servicing any system that has schrader valves, it is critical to
inspect the schraeder valve core for bends and breakage
replace any damage schrader valve core to prevent leakege
cap the schraeder ports to prevent accidental depression of the valve core
If R12 or R22 are exposed to high temperatures, these can decompose to form
hydrochloric and hydrofluoric acids
when using a graduated charging cylinder, any refrigerant that is vented from the charging cylinder
must be recovered
a standard vacuum pump designed specifically for evacuation and dehydration can
never be used as a recovery device in combination with a pressurized container
Epa certification
has no expiration date
When using a_____, it is essential to take extra measures like heating or striking the compressor, to help release trapped refrigerant form the compressor oil
passive system dependent recovery devices on a small appliances with a non operating compressor
It is an Epa regulation that any person who a opens an appliance for maintenance, service or repair must have at least one self-contained recovery machine available at their place of business. the only exception to this rule are persons working on:
small appliances
Which of the following are part of the Epa’s recommended safe work practices?
wear safety glasses or goggles when working with any compressed gases
wear butyl-lined gloves when connecting disconnecting hoses
