Recovery, recycling, and handling

The storage container for recycled refrigerant should have marked on the side to show that it meets DOT CFR title 49 requirements.

4BA, 4BW

A recovery/recycling operation is performed on an R-12 system. Technician A says special fittings to stop refrigerant from discharging when disconnecting manifold hoses are available. Technician B says refrigerant recovered must be weighed. Who is right?

Both A and B

The recovery/recycling equipment must be UL approved and certified to meet (blank) standards.

J1991

Before using, recycled refrigerant must be checked for excess (blank) gases.

Non-condensable

R-12 refrigerant went out of production in:

1995

Empty disposable refrigerant containers need to be: A) hooked up to the recovery/recycling unit and fully evacuated. B) when container shows a vacuum, write empty on the container. C) dispose of container properly. D) all of the above.

All of the above

After refrigerant has been recovered from a system and recovery/recycle unit has been turned off, how long should you wait to see if the system still has pressure?

At least 5 minutes

Technician A says that R-12 is interchangeable with R-134a. Technician B says that R-12 is not interchangeable with R-134a. Who is right?

B only

Technician A says that the R-12 flame detector will work to detect R-134a leaks. Technician B says that a R-134a electronic detector is needed. Who is right?

B only

Technician A says that the recovery/recycling equipment must have shutoff valves located 5 inches from the hoses service end. Technician B says that the recovery/recycling equipment must have shutoff valves located 12 inches from the hoses service end. Who is right?

B only

Technician A says that you should wait 15 minutes after the recovery/recycling unit has been shut down to see if the A/C system still has pressure. Technician B says that you should wait 5 minutes. Who is right?

B only

A/C systems should no longer be flushed because CFCs are released into the atmosphere. Technician A says to install an in-line filter which is large enough to trap all debris. Technician B says the filter should last the life of the vehicle. Who is right?

Both A and B

When storing recycled refrigerant use:

DOT CFR Title 49 containers

System with accumulators require more time for evaluation because they can get very cold and refrigerant can become (blank) in the lubricant that is retained in the accumulator.

Dissolved

The clean air act states that technicians servicing A/c systems (more than 100 vehicles/year) must be certified in using the recovery/recycling equipment by or after:

January 1,1992

An R-12 A/C system will run at a (blank) pressure then a R-134a system.

Lower

If the pressure of the stored recycled refrigerant is (blank) than the limit for a given temperature, the refrigerant is OK to use as is.

Lower

A technician repairing or servicing a motor vehicle air conditioner involving the use of refrigerant:

Must recover the refrigerant

Ultraviolet radiation is filtered out by the earths:

Ozone layer

PAG oil stands for:

Polyalkylene glycol

What is the new refrigerant being used in automotive A/C systems?

R-134a

Currently there are two types of recovery/recycling equipment:

Single pass and multi-pass