EPA 608 NEC 2023

EPA 608 Type 3 Exam Practice Test 6

Take a Free Practice Test-6 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 6 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 6
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EPA 608 Type 3 Exam Practice Test 6 — Question List

Question 1: The purge compressor is typically connected on top of ………………. In low pressure chiller refrigeration system.

  • Condenser
  • Oil separator
  • Chillier
  • Purge drum

Question 2: For leak testing a low pressure refrigeration system what is the maximum pressure that can be applied?

  • 10 psig
  • 5 psig
  • 15 psig
  • 20 psig

Question 3: A hydro static tube test is conducted on low pressure refrigeration system to detect

  • Expansion leakage
  • Water tube leakage
  • Compressor leakage
  • Evaporator leakage

Question 4: A unit which removes non-condensables present in the refrigeration system from the top of the condenser is called as :……….

  • Purge unit
  • Hydrostatic unit
  • Pressurizer
  • Filter

Question 5: When the pressure in the low pressure refrigeration equipment increases, the disk which releases the pressure is called as :………….

  • Rupture disk
  • Bursting risk
  • Pressure disk
  • Relief disk

Question 6: What is the rupture disk relief pressure in the low pressure refrigeration system?

  • 10 psig
  • 15 psig
  • 20 psig
  • 18 psig

Question 7: Low pressure refrigeration system will operate at …………..

  • Below atmospheric pressure
  • Above atmospheric pressure
  • More than 15 psig pressure
  • Lower than 15 psig pressure

Question 8: 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 9: 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 10: A nitrogen purging test can be performed on refrigeration system with refrigerant.

  • False
  • True
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)