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EPA 608 NEC 2023

EPA 608 Core Exam Practice Test 14

Free EPA 608 Practice Test ( CORE Exam)-14

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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 Core Exam Practice Test 14 has 13 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: 13 multiple-choice, one correct answer each

13

Questions

20 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

EPA 608 Core Exam Practice Test 14 — Question List

Question 1: Refrigerant is a good ……………..

Insulator
Conductor
Semi conductor
Resistor

Question 2: If vacuum pump is used in passive recovery what should be introduced in system to increase the pressure and avoid moisture freezing?

Dry nitrogen
CFC refrigerant
Hydrogen
Carbon

Question 3: What is the main function condenser in the refrigeration system?

To store liquid refrigerant
To remove heat from refrigerant
To remove moisture from refrigerant
To add heat to the refrigerant

Question 4: Which of the following refrigerant has highest Global Warming Potential (GWP)?

R-12
R-134a
R - 22
R-152a

Question 5: Venting HFC’s since ………………… is violation of section 608 of federal clean air act.

July 1, 1992
November 14, 1994
November 15, 1995
August 16, 1990

Question 6: The temperature of the liquid refrigerant entering in the evaporator must be ………….. surrounding air.

Less than
More than
Equal to

Question 7: The high pressure gauge usually measures ………………… pressure

Discharge pressure
Suction pressure

Question 8: If the high pressure gauge reads unusual high pressure in the refrigeration system the probable cause is ……………..

Defective compressor
Insufficient refrigerant
Condenser fan motor failure
Expansion valve failure

Question 9: Systems containing 10 kg of HFC must be leak tested ………….

Annually
Twice a year
Thrice a year
Two years once

Question 10: The mixed refrigerants can be separated and reclaimed.

True
False

Question 11: If a refrigeration system had a major component failure

an oil sample should be taken and analyzed
immediately refrigerant should recovered
a refrigerant sample should be taken and analyzed
immediately system should be purged with dry nitrogen

Question 12: What is to be likely occurred in the refrigeration system when the strong odor is detected during the recovery process?

A compressor burnout
A condenser fan motor burnout
Expansion valve failure
Oil is mixed with refrigerant

Question 13: During evacuation of a system what is the benefit of using small length and large diameter gauge set hose?

reduces the pressure drop and reduces the evacuation time
reduces the pressure drop and increases the evacuation time
reduces the refrigerant leakage

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

Questions13

Time limit20 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: EPA Section 608 (40 CFR Part 82)