CFC Automotive Air Conditioning Service 2

Question 1

Which EPA section requires technicians who service motor vehicle air conditioners to be certified?

Accepted Answer

Section 609

Answer

EPA Section 609 specifically regulates the servicing of motor vehicle air conditioners and requires technician certification.

Question 2

When recovering refrigerant from a vehicle with a small refrigerant charge (less than 200 grams), what is the minimum required recovery efficiency?

Accepted Answer

90%

Answer

For systems with less than 200 grams of refrigerant, recovery equipment must achieve at least 90% efficiency.

Question 3

A vehicle A/C system low-side gauge reads 10 psi and the high-side reads 100 psi with R-134a. What does this most likely indicate?

Accepted Answer

Low refrigerant charge or compressor failure

Answer

Both abnormally low pressures on high and low sides indicate either a low refrigerant charge or a non-functioning compressor.

Question 4

What type of oil is used in automotive A/C systems that contain R-1234yf refrigerant?

Accepted Answer

PAG oil

Answer

PAG (polyalkylene glycol) oil is the correct lubricant for R-1234yf automotive A/C systems.

Question 5

Before opening an automotive A/C system for repairs, the technician must:

Accepted Answer

Recover all refrigerant using certified equipment

Answer

Federal law requires complete refrigerant recovery using EPA-approved equipment before opening any A/C system.

(CFC) Chlorofluorocarbon Certification Practice Test