EPA 608 609 Type III 2

Question 1

Type III certification covers the servicing of which type of appliance?

Accepted Answer

Low-pressure appliances

Answer

Type III certification is required to service or dispose of low-pressure appliances.

Question 2

Which refrigerant is commonly found in low-pressure appliances?

Accepted Answer

R-123

Answer

R-123 (and previously R-11) is a typical low-pressure refrigerant used in centrifugal chillers.

Question 3

Low-pressure refrigerants have a boiling point at atmospheric pressure that is generally:

Accepted Answer

Above 50°F (10°C)

Answer

Low-pressure refrigerants boil at relatively high temperatures, above 50°F at atmospheric pressure.

Question 4

A low-pressure appliance normally operates with the low side:

Accepted Answer

Under a vacuum (below atmospheric pressure)

Answer

Low-pressure systems often operate under a partial vacuum on the low side.

Question 5

Because low-pressure systems run under a vacuum, the main concern with leaks is:

Accepted Answer

Air and moisture leaking into the system

Answer

A vacuum allows non-condensables and moisture to be drawn into the appliance.

EPA 608 609 Practice Test