Air Conditioning Repair Refrigerant Handling and Recovery Questions and Answers

Question 1

Which of the following actions is a direct violation of the EPA's Section 608 "prohibition on venting"?

Accepted Answer

Knowingly releasing R-22 from a hose when disconnecting from a residential system.

Answer

Releasing nitrogen used for a pressure test.

Answer

Failing to keep service records for an appliance containing 15 pounds of R-410A.

Answer

Topping off a system with a non-exempt refrigerant without first repairing a known leak.

Question 2

A technician is recovering refrigerant from a system with a confirmed compressor burnout. Which of the following actions is MOST critical to protect the recovery equipment?

Accepted Answer

Using an in-line filter-drier on the recovery hose.

Answer

Chilling the recovery cylinder in an ice bath.

Answer

Recovering only in the vapor phase to avoid liquid slugging.

Answer

Operating the recovery machine in a well-ventilated area.

Question 3

To prevent a recovery cylinder from dangerously over-pressurizing, a technician must ensure it is not filled with liquid refrigerant beyond what percentage of its water capacity by weight?

Accepted Answer

80%

Answer

95%

Answer

50%

Answer

65%

Question 4

According to standard safety practices, what is the MINIMUM personal protective equipment (PPE) a technician should wear when connecting and disconnecting refrigerant hoses?

Accepted Answer

Safety glasses with side shields and gloves.

Answer

A full-face respirator and steel-toed boots.

Answer

Hearing protection and a hard hat.

Answer

An apron and a reflective vest.

Question 5

A technician is trying to locate a very slow, intermittent refrigerant leak in a residential split system. A visual inspection reveals no oil traces. Which of the following is the MOST effective method for precisely locating this type of leak?

Accepted Answer

Using a high-sensitivity electronic leak detector.

Answer

Pressurizing the system with nitrogen and listening for a hissing sound.

Answer

Applying soap bubbles to all accessible joints and fittings.

Answer

Adding fluorescent dye and returning the next day with a UV light.

Question 6

To minimize the release of refrigerant when connecting and disconnecting gauges, EPA regulations require service hoses to be equipped with which of the following?

Accepted Answer

Low-loss fittings or shut-off valves.

Answer

Color-coded grips for easy identification.

Answer

A minimum length of six feet for safety.

Answer

Brass fittings to prevent corrosion.