EPA 608 609 Type II 3

Question 1

What is the recovery/evacuation requirement for a small high-pressure appliance containing less than 200 lbs with a non-operating compressor (post-1993 equipment)?

Accepted Answer

4 inches Hg vacuum

Answer

Appliances under 200 lbs with a non-operating compressor must be evacuated to 4 inches of mercury vacuum.

Question 2

Non-condensable gases such as air in a high-pressure system will cause what effect?

Accepted Answer

Higher than normal head pressure

Answer

Air and other non-condensables raise head pressure and reduce system efficiency.

Question 3

When is the best time to check for non-condensables in a recovery cylinder?

Accepted Answer

After the cylinder has stabilized at a known temperature

Answer

Allowing the cylinder to reach a stable temperature lets you compare measured pressure to the refrigerant's saturation pressure.

Question 4

An appliance with a leak rate above the applicable threshold must be repaired rather than topped off if it contains how much refrigerant?

Accepted Answer

50 pounds or more

Answer

Appliances containing 50 or more pounds of refrigerant are subject to leak repair requirements.

Question 5

What does superheat measurement help a technician verify in a high-pressure system?

Accepted Answer

Proper refrigerant charge and evaporator performance

Answer

Superheat readings indicate whether the evaporator is properly fed and the charge is correct.

EPA 608 609 Practice Test

EPA 608 609 Practice Test

EPA 608 609 Type II 3