Technicians who perform sealed system service on small appliances must have; - ANSWER Type I or Universal certification.
A small appliance is defined by EPA as; - ANSWER Appliances manufactured, charged, and hermetica
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Technicians who perform sealed system service on small appliances must have; - ANSWER Type I or Universal certification.
A small appliance is defined by EPA as; - ANSWER Appliances manufactured, charged, and hermetically sealed in a factory with 5 Lbs or less of refrigerant
Type I Certification is required for; - ANSWER persons handling refrigerant during maintenance, service, or repair of small appliances
If regulations change after the technician becomes certified; - ANSWER The technician is responsibility for complying with any future changes in the regulations.
Recovery equipment manufactured after November 15, 1993 must be; - ANSWER capable of recovering 90% of the refrigerant in the compressor os operating; 80% of refrigerant if its not or 4 inches of vaccum
Which of the following is true of small appliances refrigerant leaks; - ANSWER EPA does not require repair, but leaks should be repaired whenever possible.
Recovery equipment manufactured after November 15, 1993 must be capable of recovering; - ANSWER 90% refrigerant or or achieving 4 inches of vacuum.
Recovering multiple types of refrigerants in the same cylinder; - ANSWER will make the reclaimed refrigerants non reclaimable and a charge for disposal may be levied.
Self-contained or active recovery equipment; - ANSWER Has its own means of recovery.
System-dependant or passive recovery equipment; - ANSWER Captures refrigerant into a non-pressurized container with assistance of the appliance compressor.
What is defined as a non-condensible? - ANSWER Air
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should; - ANSWER Run the compressor and recover from the high side of the system.
When using a system-dependent recovery system on an appliance that has a non-operating compressor, the technician should; - ANSWER Place access fitting on both the low and high side of the system.
System-dependant devices may only be used on appliances containing; - ANSWER 15 pounds of refrigerant or less.
Small appliances are equipped with a straight piece of tubing (process stub) used to; - ANSWER install a piercing type access valve fitting.
If a strong odor is detected while performing the recovery process, - ANSWER A compressor burnout has likely occurred.
After the refrigerant has been recovered, which of the following can be used to flush the system? - ANSWER Nitrogen
When filling a charging cylinder with a regulated refrigerant; - ANSWER The refrigerant vapor that is vented off the top of the 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; - ANSWER Recovery is not required.
Applying heat with a heat gun to the compressor; - ANSWER can help vaporize any trapped liquid refrigerant during recovery.
Refrigerators in the 1950's and earlier may have used what refrigerants (recovery is not required)? - ANSWER Methyl Formate, Methyl Chloride, or Sulfur Dioxide.
Small appliances in recreational vehicles may use refrigerants such as Ammonia, Hydrogen, or water, and therefore; - ANSWER The refrigerant should not be recovered.
Recovery equipment manufactured before November 15, 1993 must be capable of recovering. - ANSWER 80 percent of the refrigerant or achieving 4 inches of vacuum.
When pressurizing a system with nitrogen you should; - ANSWER charge through a pressure regulator;place a relief valve in the downstream line from the pressure regulator.
After recovering refrigerant, the Nitrogen used to flush the system may be: - ANSWER legally vented.
The sale of CFCs and HCFC's are - ANSWER restricted to certified technicians
ARI 740 sets - ANSWER recovery requirements
All equipment must be equipped with - ANSWER low loss fittings
Low loss fittings should be able to - ANSWER close manually or automatically when hoses are disconnected to minimize refidgerant loss
Before beginning a refrigerant recovery procedure, it is necessary - ANSWER to know the type of refrigerant that is in the system.
self contained (active) recovery equipment stores itself in a - ANSWER pressurized recovery tank
Before opening a self contained recovery machine make sure the - ANSWER inlet valve is open, and tank does not contain excessive air (non condensables)
The only way to read refrigerant pressure correctly is at - ANSWER a stable known temperature
Air in refrigeration systems will cause - ANSWER higher discharge pressures
When purging non-condensables abide by - ANSWER operating instruction supplied by equipment manfactuer
All refrigerant recovery equipment should be check for what on a daily basis - ANSWER oil level and leaks
A system depended has a - ANSWER special charcoal activated plastic "bag" containers
System dependent equipment captures refrigerant with the assistance of - ANSWER an applicant compressor, external heat source, or vacuum pump
A standard vacuum pump can only be used in combination with a - ANSWER non-pressurized container
In order to release trapped refrigerant from the compressor oil - ANSWER heat and tap the compressor several times and/ or use a vacuum pump
Because appliances with non-operating compressors can not always achieve desired evacuation rates utilizing system dependent equipment - ANSWER The EPA requires at least one self contained recovery device available at the shop
The exception to the EPA required rule of a self contained device available is technicians - ANSWER working on small appliances only
System dependent devices may only be used on appliances - ANSWER containing 15 lbs. of refrigerant or less.
When installing an access fitting onto a sealed system, - ANSWER the fitting should be leak tested before proceeding with recovery.
It is generally recommended that _____ ____ type valves be used on only copper or aluminum tubing material, these fitting tend to leak over time and should not be left on a permanent service fixture. - ANSWER Solder-less piercing
After installing a access fitting you the system pressure to be 0 PSIG - ANSWER do not begin recovery process.
Operating a defrost heater on a domestic frost free refrigerator will help to - ANSWER vaporize any trapped liquid refrigerant and will speed the recovery process.
When recovering refrigerant from a system that experienced a compressor burn-out, - ANSWER watch for signs of contamination in the oil.
Small appliances may use such refrigerants as __,___,___ and therefore should not be recovered with current using current recovery equipment. - ANSWER Ammonia, Hydrogen, Water
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