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

For commercial refrigeration appliances containing more than 50 pounds of refrigerant, the EPA has set a maximum allowable annual leak rate of 20%. Since the calculated leak rate of 25% exceeds this threshold, the owner or operator is required to have the leak repaired within 30 days of discovery.

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

To expedite the recovery process from any system, especially one with a non-operational compressor, it is most efficient to remove the refrigerant in its liquid state first. Recovering from the liquid line allows for the removal of the densest form of the refrigerant, significantly speeding up the overall recovery time before recovering the remaining vapor.

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

For high-pressure appliances containing 200 pounds or more of refrigerant, and when using recovery/recycling equipment manufactured after November 15, 1993, the EPA requires evacuation to a level of 10 inches of Hg vacuum.

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

When using nitrogen to pressurize a system for leak testing, it is essential to use a pressure regulator to control the pressure being introduced into the system and a pressure relief valve as a safety backup to prevent over-pressurization, which could cause a rupture or explosion.

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 EPA requires that for the disposal of appliances containing between 5 and 50 pounds of refrigerant, the technician must keep records of the disposal. These records typically include the location, date of disposal, and the type of refrigerant recovered. These records must be maintained for a minimum of three years.

EPA 608 609 Practice Test

EPA 608 609 Practice Test

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