EPA 608 Universal Practice Test

Question 1

True or false: The receiver is not part of a refrigeration system's low side?

Accepted Answer

True

Answer

False

Question 2

How often should leaks in commercial refrigeration equipment's recovery or recycling units be checked?

Accepted Answer

3 Months

Answer

6 Months

Answer

2 Months

Answer

1 Month

Question 3

The leak rate is based on a percentage of the total charge depending on the amount of refrigerant lost in the previous 12 months.

Accepted Answer

False

Answer

True

Question 4

Except for commercial and industrial process refrigeration, EPA regulations mandate that any appliance containing more than 50 pounds of refrigerant be repaired if the leak rate ________ reaches of the charge per year.

Accepted Answer

10 percent

Answer

35 percent

Answer

5 percent

Answer

25 percent

Question 5

Heat pumps that use R-134a should be checked with ________ for leaks.

Accepted Answer

pressurized nitrogen

Answer

CFCs

Answer

compress dry air

Answer

HCFCs

Question 6

The refrigerant was recovered and stored in a refillable cylinder before replacing the condenser coil in a high-pressure system. This is the refrigerant.

Accepted Answer

can probably be charged back into the system

Answer

must be reclaimed

Answer

must be detsroyed

Answer

should probably be replaced with R-410a

Question 7

Before switching to liquid charging on an R-410a system with a water-cooled condenser, you must first charge with vapor to a pressure of at least ________.

Accepted Answer

120 psig

Answer

220 psig

Answer

320 psig

Answer

20 psig

Question 8

What is the use of soap bubble testing?

Accepted Answer

to pintpoint leaks

Answer

to detect water leaks

Answer

to see if the condenser or evaporator is dirty

Answer

only with CFCs and HCFCs

Question 9

When the leak rate exceeds ________ the charge per year, EPA regulations require that leaking commercial or industrial process refrigeration equipment be repaired.

Accepted Answer

30%

Answer

15%

Answer

25%

Answer

5%

Question 10

Which of the following gases is used in leak detection?

Accepted Answer

HCFC-22

Answer

R-12

Answer

R-500

Answer

CO2