When using nitrogen, the nitrogen tank should always be equipped with a:
What is a regulator
100
A compressor burnout has likely occurred when
A pungent odor is detected during a system recovery and or repair
100
How often does the CFC certification need to be renewed
There is no expiration date
100
After November 15, 1993 recovery from small appliances must
What is recover 90% when the compressor is operating a 4 inch vacuum
100
When is it essential to take extra measures to help release trapped refrigerant from the compressor oil
What is a passive system dependent recovery with a non operating compressor
200
Which is not a Type 1 appliance
What is a MVAC-like system that holds three pounds of R-12
200
When is it necessary to heat and strike the compressor with a rubber mallet
What is recovering refrigerant into a non pressurized container from a refrigerator with an inoperative compressor.
200
A standard vacuum pump designed specifically for evacuation and dehydration can
What is never be used as a recovery device in combination with a pressurized container.
200
Low loss fitting serve to
What is prevent refrigerant loss from hoses
300
True or False
Ammonia, Hydrogen and water can all be recovered with current EPA approved devices.
What is false
300
In the event of a large release of R-12 or R-22 in a contained area, what will happen
What is leaving the area or using a self-contained breathing apparatus (SCBA)?
300
R-12 must be
What is recovered with equipment regulated by the EPA under section 608
300
When servicing a small appliance with a leak
It is not mandatory to repair the leak
300
A shipping label used for refrigerant it is necessary to
What is follow all proper labeling and DOT protocol
400
True or False:
R-410A, R-1241 and R-141b can all be used as a replacement for R-22 in small appliances
What is false
400
The EPA recommends this for safe working practices
What is wearing safety glasses and butyl-lined gloves when connecting/disconnecting hoses or working with compressed gas
400
When recovering refrigerant from a frost free refrigerator you should
What is turn on the defrost heat to vaporize any trapped liquid
400
If a large leak or refrigerant occurs in an enclosed in an enclosed area and no self-contained self contain breathing apparatus is available, what should the tech do
What is vacate and ventilate the spill area.
400
R-23, R-13, R-505 are all
What is very high pressure appliances above 355 psia
500
Recover devices manufactured before November 15, 1993 must
What is recover 80%
500
At high temperatures R-12 and R-22 can decompose to form
What is a phosgene gas
500
The sale of CFC & HCFC refrigerants is
What is restricted to EPA technicians certified to recover refrigerant.
500
Who is able to purchase refrigerant?
What is EPA fully certified technicians
500
When R-500is recovered from an appliance
What is it must be recovered into its own recovery vessel, unless a cylinder that already contains some.