FREE A2L Safe Handling and Service Questions and Answers

Question 1

A technician is preparing to service an A2L refrigerant system in a small, enclosed mechanical room.
Which of the following actions is MOST critical to perform before starting any work that involves opening the refrigerant circuit?

Accepted Answer

Establish and maintain mechanical ventilation in the work area.

Answer

Ensure all tools are properly calibrated.

Answer

Verify the model number of the equipment.

Answer

Check the ambient temperature and humidity.

Question 2

When recovering A2L refrigerants, which piece of equipment MUST be rated specifically for use with flammable refrigerants?

Accepted Answer

The recovery machine.

Answer

The refrigerant scale.

Answer

The service vehicle.

Answer

The pressure-temperature chart.

Question 3

A technician is transporting several cylinders of an A2L refrigerant in a service van. According to DOT guidelines and best practices, what is a key requirement for transporting these cylinders safely?

Accepted Answer

Cylinders must be secured in an upright position.

Answer

Cylinders must be chilled before transport.

Answer

The vehicle must have a fire-suppression system.

Answer

The total weight of all refrigerants must not exceed 50 lbs.

Question 4

Which of the following Personal Protective Equipment (PPE) is specifically recommended due to the flammability risk of A2L refrigerants, in addition to standard safety glasses and gloves?

Accepted Answer

Flame-retardant clothing.

Answer

A hard hat.

Answer

Steel-toed boots.

Answer

A high-visibility vest.

Question 5

During the service of an A2L system, a technician must braze a connection. After recovering the refrigerant, what is the mandatory next step before applying heat?

Accepted Answer

Purge the isolated section of the system with an inert gas like dry nitrogen.

Answer

Pressurize the system with compressed air to check for leaks.

Answer

Apply a heat-absorbing paste around the joint.

Answer

Verify the system's oil level.

Question 6

A newly installed A2L system is being commissioned. Which leak detection method is explicitly forbidden for use with A2L refrigerants?

Accepted Answer

A halide torch or any detector using an open flame.

Answer

An electronic leak detector rated for A2L refrigerants.

Answer

Soap bubbles or a fluorescent dye.

Answer

An ultrasonic leak detector.