EPA 608 Certification Practice Test

Question 1

True or False, All Refrigerant Oils are Hydroscopic:

Accepted Answer

True

Answer

False

Question 2

Which of the following refrigerants is only used in disposable cylinders:

Accepted Answer

Virgin refrigerant

Answer

Recovery refrigerant

Answer

Either virgin or recovery refrigerant

Answer

None of the above

Question 3

Never pressurize a system with compressed air or oxygen because

Accepted Answer

when mixed with compressor oil or some refrigerants, it could explode.

Answer

oxygen and compressed air do not mix with refrigerants.

Answer

leaking oxygen or compressed air is more difficult to detect than nitrogen.

Answer

the pressure produced by either oxygen or compressed air are not
as good as nitrogen pressures.

Question 4

After 1995, the only source of CFC refrigerants for current refrigeration appliances in the United States was from .

Accepted Answer

recovery and recycling.

Answer

third-world chemical companies.

Answer

solvent conversion

Answer

none of the above

Question 5

The most frequent type of oil used in stationary refrigeration systems using HFC-134a refrigerant is

Accepted Answer

ester oil

Answer

mineral oil

Answer

All oils are compatible with HFC-134a

Answer

All oils are compatible with HFC-134al

Question 6

Inhaling refrigerant vapors or mist is not recommended because

Accepted Answer

they may cause heart irregularities and/or unconsciousness

Answer

they can lower the bodies core temperature

Answer

they may cause skin cancer

Answer

they are addictive

Question 7

The ozone depletion potential (ODP) of Class II refrigerants is less than  _____ :

Accepted Answer

0.2

Answer

0.5

Answer

1.0

Answer

0.7

Question 8

The person responsible for ensuring that the refrigerant has been removed from household refrigerators before they are disposed of is the person accountable 
under the EPA's "safe disposal requirement."

Accepted Answer

final person in the disposal chain

Answer

service technician that last worked on the appliance

Answer

the manager of the service company that last performed work on the appliance

Question 9

True or False? Before scrapping, the final individual in the disposal chain must check.
All the refrigerant has been removed from the appliances.

Accepted Answer

True

Answer

False

Question 10

Which HC refrigerant can be used in new small domestic appliances?

Accepted Answer

R-600a

Answer

R-717

Answer

R-410a

Answer

R-404A