EPA 608 609 - EPA Refrigerant Handling Certification EPA 608 Type III Practice Test 1

Question 1

Which refrigerant is most commonly found in older low-pressure centrifugal chillers that require Type III EPA 608 certification?

Accepted Answer

R-11

Answer

R-22

Answer

R-134a

Answer

R-410A

Question 2

Under EPA Section 608 regulations, to what level must a technician recover refrigerant from a Type III low-pressure appliance before opening the system for service?

Accepted Answer

25 mm Hg absolute pressure

Answer

0 psig (atmospheric pressure)

Answer

150 psig

Answer

29.92 in Hg vacuum

Question 3

How do technicians most reliably detect leaks in a Type III low-pressure chiller system during operation?

Accepted Answer

Monitoring for a rise in system pressure caused by air infiltration

Answer

Looking for ice or frost formation on refrigerant fittings

Answer

Pressurizing the system with nitrogen and checking for bubbles

Answer

Using an ultrasonic detector tuned for high-pressure refrigerant escape

Question 4

What is the annual leak repair trigger rate established by EPA regulations for comfort cooling low-pressure chillers containing more than 50 pounds of refrigerant?

Accepted Answer

10% of the refrigerant charge per year

Answer

35% of the refrigerant charge per year

Answer

15% of the refrigerant charge per year

Answer

5% of the refrigerant charge per year

Question 5

When non-condensable gases such as air accumulate in a Type III low-pressure chiller, what is the primary operational consequence?

Accepted Answer

Condensing pressure rises and system efficiency decreases

Answer

Evaporator temperature drops below the design setpoint

Answer

Refrigerant charge increases beyond system capacity

Answer

The purge unit shuts down automatically to protect the compressor

Question 6

A Type III chiller's purge unit is activating far more frequently than normal. What is the most likely cause?

Accepted Answer

Air is leaking into the system at an abnormal rate

Answer

The refrigerant charge has been overfilled

Answer

The compressor is operating at higher-than-rated speed

Answer

The condenser water temperature is too cold