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EPA 609 Practice Test: Motor Vehicle Air Conditioning

Refrigerants, regulations, recovery and recycling equipment, service procedures and safety for the EPA Section 609 MVAC certification.

187 questions · 7 topics · free, no sign-up

Mixed practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

Timed mock exam

50 questions in 60 minutes, drawn from every topic. No answers shown until the end, then a score, your weakest topics and a review of what you missed.

Practise by topic

Sample questions

SAE J2788 is the standard for equipment that recovers, recycles and recharges

  1. R-12
  2. R-1234yf
  3. R-134a
  4. R-744
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C. R-134a

J2788 covers R-134a recovery/recycling/recharging machines. R-1234yf machines are built to J2843, and the old R-12 machines to J1990.

Reference: SAE J2788; 40 CFR Part 82 Subpart B, Appendix C

What is the ASHRAE safety classification of R-1234yf?

  1. A1
  2. A2L
  3. A3
  4. B2L
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B. A2L

R-1234yf is A2L: lower toxicity (A) and lower flammability (2L). A1 is non-flammable, like R-134a, and A3 is highly flammable, like propane.

Reference: ASHRAE Standard 34

A quick-lube shop adds refrigerant to customers' A/C systems at no extra charge as part of a paid service package. Does the person doing this need Section 609 certification?

  1. No, because the customer is not charged for the refrigerant
  2. Yes, because the work is part of a service the customer pays for
  3. No, because adding refrigerant is not considered service
  4. Yes, but only if more than one full pound of refrigerant is added
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B. Yes, because the work is part of a service the customer pays for

Service 'for consideration' includes work bundled into a paid visit, even if the top-off itself is listed as free. Adding refrigerant is servicing the system, and there is no minimum quantity.

Reference: 40 CFR 82.32 (service for consideration); 82.34

Liquid refrigerant splashes into a technician's eye. What is the correct first response?

  1. Rub the eye to warm it and restore circulation
  2. Apply a hot compress for fifteen minutes
  3. Wait to see whether vision clears before acting
  4. Flush it with water and get medical attention
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D. Flush it with water and get medical attention

Flushing with clean water warms the tissue gently and washes out refrigerant and oil; a doctor should then examine the eye. Rubbing or direct heat damages frozen tissue further.

Reference: Refrigerant safety data sheets

Since January 1, 2018, a person buying a 30-lb cylinder of R-134a for vehicle A/C service must

  1. hold a state business license only
  2. sign a statement that it will not be vented
  3. be a certified technician or employ one
  4. be at least 21 years of age
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C. be a certified technician or employ one

The sales restriction that once covered only ozone-depleting refrigerants was extended to substitutes such as R-134a in 2018. Sellers must verify Section 609 (or 608) certification for containers other than exempt small cans.

Reference: 40 CFR 82.154(c)

Exams this helps with

ExamWho runs itWhere
EPA Section 609 motor vehicle air conditioning readyEPA-approved certifiersUnited States

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