EPA 608 609 Leak Detection and Repair 2

Question 1

What is the current EPA annual leak rate threshold that triggers mandatory repair for a commercial refrigeration appliance?

Accepted Answer

20%

Answer

Commercial refrigeration appliances must be repaired when the annual leak rate exceeds 20%.

Question 2

Once a leak exceeding the trigger rate is found, how many days do owners generally have to repair the leak?

Accepted Answer

30 days

Answer

Owners must repair leaks exceeding the applicable rate within 30 days of discovery.

Question 3

A soap-bubble test is best described as which type of leak detection method?

Accepted Answer

Direct (visual/physical) method

Answer

Soap bubbles are a direct method, revealing escaping gas as visible bubbles.

Question 4

Which leak detection method involves adding a substance that glows under ultraviolet light?

Accepted Answer

Fluorescent dye tracer

Answer

Fluorescent dye injected into the system glows under UV light at leak points.

Question 5

What gas is most commonly used to pressurize a system for leak testing without introducing refrigerant?

Accepted Answer

Dry nitrogen

Answer

Dry nitrogen is used to pressure-test systems because it is inert and moisture-free.

EPA 608 609 Practice Test