EPA 608 Core Practice Test

Practice EPA 608 Core questions covering ozone depletion, refrigerant regulations, recovery, evacuation and safety. Get immediate answers and explanations.

What the Core Section Covers

Required for all technicians. Covers ozone depletion, the Clean Air Act Section 608, recovery techniques, and general safety.

10 Free EPA 608 Core Practice Questions

Try these Core questions free, no account required. Each one includes an explanation of the correct answer.

0 of 10 answered

Question 1 of 10

Most of the Earth's protective ozone is located in which atmospheric layer?

The stratosphere

The troposphere

The mesosphere

The ionosphere

Show answer & explanation

Correct answer: The stratosphere

Per the EPA Section 608 Core exam content: The stratosphere

Question 2 of 10

Between CFCs, HCFCs, and HFCs, ozone-depletion potential (ODP) ranks:

HCFCs highest, then CFCs, then HFCs

All equal

HFCs highest, then HCFCs, then CFCs

CFCs highest, then HCFCs, then HFCs (near zero)

Show answer & explanation

Correct answer: CFCs highest, then HCFCs, then HFCs (near zero)

Per the EPA Section 608 Core exam content: CFCs highest, then HCFCs, then HFCs (near zero)

Question 3 of 10

A crankcase heater is used to:

Keep refrigerant from migrating into and condensing in the compressor oil

Raise head pressure

Heat the conditioned space

Boil off oil

Show answer & explanation

Correct answer: Keep refrigerant from migrating into and condensing in the compressor oil

Per the EPA Section 608 Core exam content: Keep refrigerant from migrating into and condensing in the compressor oil

Question 4 of 10

Which technique speeds up refrigerant recovery?

Use long, small-diameter hoses

Warm the recovery cylinder

Use short, large-diameter hoses to reduce pressure drop

Lower the system pressure

Show answer & explanation

Correct answer: Use short, large-diameter hoses to reduce pressure drop

Per the EPA Section 608 Core exam content: Use short, large-diameter hoses to reduce pressure drop

Question 5 of 10

Air, moisture, and other non-condensables in a system are removed by:

Adding more refrigerant

Evacuating (pulling a vacuum) with a vacuum pump

Adding oil

Raising head pressure

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Correct answer: Evacuating (pulling a vacuum) with a vacuum pump

Per the EPA Section 608 Core exam content: Evacuating (pulling a vacuum) with a vacuum pump

Question 6 of 10

The leading cause of death in refrigerant-handling accidents is:

Phosgene inhalation

Oxygen deprivation (asphyxiation), because refrigerants are heavier than air

Freezing

Electrocution

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Correct answer: Oxygen deprivation (asphyxiation), because refrigerants are heavier than air

Per the EPA Section 608 Core exam content: Oxygen deprivation (asphyxiation), because refrigerants are heavier than air

Question 7 of 10

Refillable recovery cylinders are identified by what color scheme?

Gray body with a yellow top

All red

All green

Blue with white top

Show answer & explanation

Correct answer: Gray body with a yellow top

Per the EPA Section 608 Core exam content: Gray body with a yellow top

Question 8 of 10

A refrigerant cylinder should never be filled beyond what percent of capacity?

80%

60%

100%

90%

Show answer & explanation

Correct answer: 80%

Per the EPA Section 608 Core exam content: 80%

Question 9 of 10

For leak testing, the preferred pressurizing gas is:

Oxygen

Compressed air

Nitrogen (an inert gas)

Pure refrigerant

Show answer & explanation

Correct answer: Nitrogen (an inert gas)

Per the EPA Section 608 Core exam content: Nitrogen (an inert gas)

Question 10 of 10

Oxygen or compressed air must never be used to pressure-test a system because:

It freezes the oil

It cannot be detected

It is too expensive

In the presence of oil it can be highly explosive

Show answer & explanation

Correct answer: In the presence of oil it can be highly explosive

Per the EPA Section 608 Core exam content: In the presence of oil it can be highly explosive

Practice the Full Core Question Bank

The complete Core section has 430 practice questions. The first 5 of each practice session are free — unlock full access to keep going.

More Ways to Prepare

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