EPA 608 609 Type II High-Pressure Systems 2

Question 1

Which refrigerant is most commonly associated with Type II high-pressure appliances?

Accepted Answer

R-22

Answer

R-12

Answer

R-11

Answer

R-123

Question 2

A high-pressure appliance with 50 lbs of charge that is not being disposed of must be repaired within how many days of a leak being detected?

Accepted Answer

30 days

Answer

10 days

Answer

60 days

Answer

90 days

Question 3

Before opening a high-pressure system for service, the refrigerant should be recovered to what level for a system with an open compressor?

Accepted Answer

4 inches of vacuum

Answer

0 psig

Answer

10 inches of vacuum

Answer

15 psig

Question 4

What is the required recovery vacuum level for a high-pressure appliance with more than 200 lbs of charge manufactured after November 15, 1993?

Accepted Answer

15 inches Hg vacuum

Answer

0 psig

Answer

10 inches Hg vacuum

Answer

25 inches Hg vacuum

Question 5

Which device measures the depth of vacuum achieved during evacuation of a high-pressure system?

Accepted Answer

Micron gauge

Answer

Compound gauge only

Answer

Thermistor

Answer

Ammeter

Question 6

Non-condensable gases such as air in a high-pressure system primarily cause what problem?

Accepted Answer

Higher head pressure

Answer

Lower head pressure

Answer

Increased cooling capacity

Answer

Lower compressor temperature

Question 7

What color is the high-pressure (liquid line) side gauge on a typical manifold gauge set?

Accepted Answer

Red

Answer

Blue

Answer

Yellow

Answer

Green