| EPA regulations include which of the following in the definition of small appliances Both A and B | When servicing a small appliance for leak repair It is not mandatory to repair the leak but do so whenever possible |
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What is the maximum normal charge of HCFC or HFC refrigerant in an appliance that is allowed to use system Dependant recovery equipment?
The maximum normal charge of HCFC or HFC refrigerant in an appliance that is allowed to use system dependent recovery equipment, is
15 pounds
. System dependant means that the recovery process depends on the compressor being operational in order to extract the amount of refrigerant that satisfies AHRI 740 requirements.
Which of the following are included in Epas definition of a small appliance?
A small appliance is defined by EPA as;
Appliances manufactured, charged and hermetically sealed in a factory that contains 5 lbs. or less of refrigerant
.
What is the maximum allowable charge of refrigerant for type 1 appliances using CFCs HCCC or HFCS?
Whenever nitrogen is used to pressurize or blow debris out of the system. What is the maximum allowable factory charge of refrigerant for Type I appliances using CFCs, HCFCs, or HFCs?
15 lbs.
Who must certify recovery equipment used during maintenance service or repair of small appliance that use CFCs HCFCs and HFCS?
Who must certify recovery equipment used during maintenance, service or repair of small appliances that use CFCs, HCFCs, and HFCS?
An EPA-approved laboratory
. When servicing a small appliance found to be leaking it is; not mandatory to repair the leak but it is recommended to do so whenever possible.
What is the EPA definition of a small appliance?
A small appliance is defined by EPA as;
Appliances manufactured, charged, and hermetically sealed in a factory with 5 Lbs or less of refrigerant
.
Type I Certification is required for
; persons handling refrigerant during maintenance, service, or repair of small appliances.
Which refrigerants must be recovered before opening?
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs)
have which of the following in common? They must be recovered before opening or disposing of appliances. After 1995, supplies of CFC refrigerant for equipment servicing will come from; recovery and recycling.
Which refrigerants can be mixed in a system?
The most commonly mixed refrigerants in the field are the replacements for
R-22 — R-427A, R-438A, R-422D, and R-407C
— which are often combined with the remaining R-22 in the system, said Maiorana.
Which refrigerant does not need to be recovered?
Co2 refrigerant R-744 (Carbon dioxide)
is a very high-pressure refrigerant and generally does not need to be recovered.
Which condition requires accessing both the high and low side of the system for refrigerant recovery?
using the system dependent (passive) recovery process, which condition requires accessing both the high and low side of the system for refrigerant recovery?
it is necessary to heat the compressor and strike it with a rubber mallet.
What type of appliances are technicians certified to charge and open after passing the Type 1 exam?
What type of appliances are technicians certified to charge and open after passing the Type 1 examination?
Appliances containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at the factory
.
Which HC refrigerant is allowed for use in new domestic small appliances?
| Question Answer | After the refrigerant has been recovered,which of the following can be used to flush the system? Nitrogen | Which hc refrigerant is allowed for use in New domestic small appliances? R-600a | Recovering multiple types of refrigerants in the same cylinder; Will make the reclaimed refrigerants unreclaimable |
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What gases can CFC refrigerants decompose into at high temperatures?
At high temperatures, CFC and HCFC refrigerants decompose to
hydrochloric acids and hydrofluoric acids
.
What service aperture or process stub is used on small appliances?
The 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 typically is: a straight piece of tubing, called a
Process Tube
, that is entered using a piercing access valve.
Which of the following best describes low loss fittings?
Which of the following best describes low loss fittings on refrigerant recovery devices used to recover CFCs, HCFCs, and HFCs? They can be either manually closed or automatically closed when disconnected to prevent loss of refrigerant from hoses. …
the fitting should be leak tested before proceeding with recovery
.
Who must certify recovery equipment?
Section 608 of the Clean Air Act requires all refrigerant recovery equipment be certified by
an EPA-approved testing organization
to assure that the equipment meets EPA standards based on the test method established by AHRI Standard 740.
