Free EPA 608 Practice Test

Prepare for your EPA Section 608 certification with free practice questions for Core, Type I, Type II and Type III. Answer exam-style questions, get immediate explanations and identify the sections you need to improve.

Free 20-Question EPA 608 Diagnostic Test

Answer five questions from each EPA 608 section. At the end, you'll see your overall score, your score for each section and the area you should practise next.

0 of 20 answered

CoreQuestion 1 of 20

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

Show answer & explanation

Correct answer: The stratosphere

Per the EPA Section 608 Core exam content: The stratosphere

Type IQuestion 2 of 20

Which is the EPA definition of a SMALL APPLIANCE?

Show answer & explanation

Correct answer: A product fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant

Per the EPA Section 608 Type I exam content: A product fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant

Type IIQuestion 3 of 20

Before charging a new system with refrigerant, what should be done?

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Correct answer: Pressurize with nitrogen (classified as an inert gas) and leak checked.

Per the EPA Section 608 Type II exam content: Pressurize with nitrogen (classified as an inert gas) and leak checked.

Type IIIQuestion 4 of 20

A LOW-pressure appliance uses a refrigerant with a boiling point:

Show answer & explanation

Correct answer: Above 10°C (50°F) at atmospheric pressure

Per the EPA Section 608 Type III exam content: Above 10°C (50°F) at atmospheric pressure

CoreQuestion 5 of 20

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

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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)

Type IQuestion 6 of 20

An MVAC-like appliance is:

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Correct answer: An open-drive, mechanical vapor-compression appliance cooling a non-road vehicle cab (excludes units using HCFC-22)

Per the EPA Section 608 Type I exam content: An open-drive, mechanical vapor-compression appliance cooling a non-road vehicle cab (excludes units using HCFC-22)

Type IIQuestion 7 of 20

What tools can you use to find general area of leaks and pinpoint leaks?

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Correct answer: Electronic or ultrasonic leak detector will provide the general area of the leak

Per the EPA Section 608 Type II exam content: Electronic or ultrasonic leak detector will provide the general area of the leak

Type IIIQuestion 8 of 20

Low-pressure systems (large chillers) operate:

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Correct answer: Below atmospheric pressure (in a vacuum)

Per the EPA Section 608 Type III exam content: Below atmospheric pressure (in a vacuum)

CoreQuestion 9 of 20

A crankcase heater is used to:

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

Type IQuestion 10 of 20

If a small-appliance compressor is INOPERATIVE, refrigerant should be recovered from:

Show answer & explanation

Correct answer: Both the high-side and low-side access valves

Per the EPA Section 608 Type I exam content: Both the high-side and low-side access valves

Type IIQuestion 11 of 20

Traces of oil around a sight glass inlet fitting of a refrigeration system might be the indication of:

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Correct answer: A leak

Per the EPA Section 608 Type II exam content: A leak

Type IIIQuestion 12 of 20

In a low-pressure system, a leak usually means:

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Correct answer: Air and moisture leak INTO the system (rather than refrigerant leaking out)

Per the EPA Section 608 Type III exam content: Air and moisture leak INTO the system (rather than refrigerant leaking out)

CoreQuestion 13 of 20

Which technique speeds up refrigerant recovery?

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

Type IQuestion 14 of 20

If a small-appliance compressor IS operating, a system-dependent recovery pulls from:

Show answer & explanation

Correct answer: A single access valve on the high side

Per the EPA Section 608 Type I exam content: A single access valve on the high side

Type IIQuestion 15 of 20

Type II classification, as identified by EPA, applies to what equipment?

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Correct answer: Split air conditioning equipment with five (5) pounds of refrigerant or more

Per the EPA Section 608 Type II exam content: Split air conditioning equipment with five (5) pounds of refrigerant or more

Type IIIQuestion 16 of 20

Excessive operation of the purge unit on a low-pressure chiller indicates:

Show answer & explanation

Correct answer: A leak allowing air/moisture into the system

Per the EPA Section 608 Type III exam content: A leak allowing air/moisture into the system

CoreQuestion 17 of 20

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

Show answer & explanation

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

Type IQuestion 18 of 20

System-dependent (passive) recovery on small appliances uses:

Show answer & explanation

Correct answer: The appliance's own compressor or internal pressure to move refrigerant

Per the EPA Section 608 Type I exam content: The appliance's own compressor or internal pressure to move refrigerant

Type IIQuestion 19 of 20

What is the purpose of the filter drier and when should it be changed?

Show answer & explanation

Correct answer: To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened

Per the EPA Section 608 Type II exam content: To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened

Type IIIQuestion 20 of 20

A purge unit removes non-condensables from what part of a low-pressure chiller?

Show answer & explanation

Correct answer: The top of the condenser

Per the EPA Section 608 Type III exam content: The top of the condenser

Choose a Certification Practice Test

Prefer to focus on one section at a time? Each certification type has its own free sample questions, full practice mode and timed exam mode.

What's Included in EPA 608 Ready?

  • Core, Type I, Type II and Type III practice questions
  • Immediate answer explanations after every question
  • Timed exam simulations with a pass/fail score
  • Mistake tracking that resurfaces questions you've missed
  • Favorites so you can bookmark questions for later review
  • Progress stored on your device — no account required to start practicing
  • Free sample questions in every section, no sign-in needed
  • A one-time purchase to unlock the complete question bank

These questions are written to reflect EPA 608 exam topics. They are not official EPA exam questions and are not guaranteed to be identical to your certifying organization's test.

Free Practice vs Complete Access

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  • The 20-question diagnostic test above
  • 10 free sample questions in each of Core, Type I, Type II and Type III
  • The first 5 questions of full Practice Mode in every category
  • Immediate explanations on every free question

Complete access — one-time $4.99

  • Unlimited Practice Mode across all 1094 questions
  • Timed Exam Mode simulations
  • Mistake tracking and review
  • Favorites and keyword search
  • Your progress dashboard

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Frequently Asked Questions

Is the EPA 608 practice test free?
Yes. The 20-question diagnostic test on this page and 10 sample questions in each of Core, Type I, Type II and Type III are free with no account required. Unlocking the complete question bank, unlimited practice, mistake tracking and full exam simulations is a one-time $4.99 purchase.
Which EPA 608 sections are covered?
Core (required for every technician), Type I (small appliances), Type II (high-pressure appliances) and Type III (low-pressure appliances).
Does EPA 608 Ready include a Universal practice test?
Yes — the Universal practice test combines Core, Type I, Type II and Type III questions in one place and shows which section needs the most work.
Do the practice questions include explanations?
Yes. Every question — free or unlocked — shows an explanation alongside the correct answer.
Can I retake the practice test?
Yes. Use the Restart test button to try the diagnostic again, or start a new Practice Mode or Exam Mode session at any time.
Do I need to create an account?
No account is needed for free practice. Signing in with Google is only required if you choose to unlock the complete question bank.
What does the $4.99 purchase unlock?
Unlimited Practice Mode across the complete question bank, timed Exam Mode simulations, mistake tracking, favorites, search and your progress dashboard — as a one-time payment, not a subscription.
Is EPA 608 Ready affiliated with the EPA?
No. EPA 608 Ready is an independent study tool and is not affiliated with or endorsed by the EPA. The practice questions are for study purposes only and are not official EPA 608 exam content.

More EPA 608 Resources

Preparing for more than just practice questions? These guides cover the certification itself.

“Passed on my first try! Thanks to EPA 608 Ready, I managed to pass the test on my very first try. If you need to pass your EPA 608 exam, I highly recommend using this. It works!”
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Disclaimer: This site is an independent study tool and is not affiliated with or endorsed by the EPA. The sample questions are for practice purposes only and are not official EPA 608 exam content.