EPA 608 609 - EPA Refrigerant Handling Type II High-Pressure Systems Questions and Answers

Question 1

A technician is called to service a commercial refrigeration unit containing 60 pounds of R-404A.
The annualized leak rate has been calculated to be 25%.
According to EPA regulations, what is the required action?

Accepted Answer

The leak must be repaired within 30 days.

Answer

The system must be immediately shut down and replaced.

Answer

No action is required as the leak rate is below the threshold for commercial refrigeration.

Answer

The owner has 12 months to monitor the leak before taking action.

Question 2

When recovering refrigerant from a Type II system with an inoperative compressor, which of the following is a correct procedure?

Accepted Answer

Recover as much liquid refrigerant as possible from the liquid line first.

Answer

Pressurize the system with nitrogen to force out the refrigerant.

Answer

Use a passive (system-dependent) recovery device.

Answer

Heat the compressor and strike it with a hammer.

Question 3

A technician needs to perform a major repair on a high-pressure appliance containing 210 lbs of R-22 that was manufactured after November 15, 1993. What is the required evacuation level?

Accepted Answer

10 inches of Hg

Answer

0 inches of Hg

Answer

4 inches of Hg

Answer

15 inches of Hg

Question 4

Which of the following safety precautions is critical when pressurizing a Type II system with nitrogen for a leak test?

Accepted Answer

Ensure a pressure regulator and a pressure relief valve are installed on the nitrogen cylinder.

Answer

Use a small amount of oxygen as a trace gas.

Answer

Pressurize the system to at least 500 psig to find all leaks.

Answer

Always charge the nitrogen as a liquid to speed up the process.

Question 5

A technician is disposing of a high-pressure appliance containing more than 5 pounds but less than 50 pounds of R-134a. What must be done before the appliance can be scrapped?

Accepted Answer

Records of the refrigerant recovery must be kept for at least 3 years.

Answer

The refrigerant must be vented in a well-ventilated outdoor area.

Answer

The refrigerant must be recovered to a level of 4 inches of Hg vacuum.

Answer

The compressor must be rendered inoperative.

Question 6

When charging a blended refrigerant like R-410A into a Type II system, how should the refrigerant be introduced?

Accepted Answer

As a liquid into the king valve or liquid line service port.

Answer

As a vapor through the suction line with the system running.

Answer

It can be charged as either a liquid or vapor depending on ambient temperature.

Answer

As a throttled liquid into the compressor's suction port.