EPA 608 NEC 2023

EPA 608 Type 3 Exam Practice Test 5

Take a Free Practice Test-5 EPA Certification Type 3

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The EPA 608 certification is required by law for any technician who purchases or handles refrigerants. It covers safe handling, leak detection, recovery, and environmental regulations.

Type I covers small appliances (≤5 lbs refrigerant), Type II covers high-pressure systems, Type III covers low-pressure systems, and Universal covers all three. Most HVAC technicians pursue Universal certification.

You must score at least 70% on each section of the exam. The Universal exam has four parts: core, Type I, Type II, and Type III.

How to Use This Practice Test

This EPA 608 Type 3 Exam Practice Test 5 has 10 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: The EPA 608 exam is NOT open book — memorize refrigerant ODP/GWP values and recovery rules before the exam.

  • Topics covered: Refrigerant regulations, recovery procedures, leak detection, and refrigerant properties.
  • Passing score: 70% required on each section. Universal certification requires passing all four sections.
  • Questions: 10 multiple-choice, one correct answer each
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EPA 608 Type 3 Exam Practice Test 5
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EPA 608 Type 3 Exam Practice Test 5 — Question List

Question 1: The centrifugal compressors should be charged through ………………..

  • Evaporator charging valve
  • Condenser suction line
  • Liquid line
  • Vapor line

Question 2: When a low pressure refrigerant system is opened for service ………………… should be replaced compulsory.

  • Filter drier
  • Compressor
  • Expansion valve
  • Condenser tube

Question 3: What should be the minimum capacity of R-410A refrigerant recovery tanks?

  • 400 psig
  • 200 psig
  • 350 psig
  • 120 psig

Question 4: If the refrigeration contains large amount of moisture, to prevent freezing of moisture during evacuation the system pressure can be increased with …………. Gas

  • Nitrogen
  • Oxygen
  • Hydrogen
  • Argon

Question 5: If the pressure in the refrigeration circuit is lowered then it causes the refrigerant …………….

  • Liquid to vaporize
  • Liquid to freeze
  • Vapor to liquid
  • Vapor to leak.

Question 6: Which refrigerant you must recover first from the refrigeration system?

  • Liquid refrigerant
  • Vapor refrigerant

Question 7: In maximum how many days the discovered leak should be repaired as per EPA?

  • 15 days
  • 30 days
  • 45 days
  • 60 days

Question 8: In commercial and industrial refrigeration systems, if the leak percentage increases more than ………….. of the charge per year must be removed.

  • 30 %
  • 35 %
  • 50 %
  • 15 %

Question 9: The leaks in a refrigeration system contains ……………. refrigerant need not be repaired as per EPA.

  • Less than 50 pounds
  • Greater than 50 pounds
  • Less than 100 pounds
  • Greater than 100 pounds

Question 10: What is the rupture disk relief pressure in the low pressure refrigeration system?

  • 10 psig
  • 15 psig
  • 20 psig
  • 18 psig
Study Tip: The EPA 608 exam is closed book. Memorize: recovery is required before opening any refrigerant system. Venting refrigerant is illegal. Know the ODP and GWP values for R-22, R-410A, R-134a, R-32, and R-454B.
EXAM CARD EPA 608
Questions10
Time limit15 min
Pass score70%
Code editionNEC 2023
DifficultyIntermediate
Last reviewedJun 2026

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Source: EPA Section 608 (40 CFR Part 82)