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EPA 608 NEC 2023

EPA 608 Core Exam Practice Test 12

Free EPA 608 Practice Test ( CORE Exam)-12

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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 12 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 12 — Question List

Question 1: The refrigerant cylinders always shipped in ……………. position with their valves on top.

Vertical
Horizontal

Question 2: The relief valves which are placed in the downstream line of nitrogen pressure regulator must not be installed in ………….

Series
Parallel

Question 3: After which year onwards the CFC refrigerant should come from recovery and recycling to service existing refrigeration systems in USA?

1995
1992
1997
1994

Question 4: Disposable cylinders are primarily used for ………….. refrigerant

Recovered
Recycled
Virgin
Fresh

Question 5: CFC and HFC both have which of the following in common?

They both have higher ODP
They both must be recovered before recycling or disposing the appliance
The both contain chlorine atom which destroys the ozone
Their normal boiling point is same.

Question 6: The ozone layer in the earth’s stratosphere protects the earth from ………..

UV radiation
Infrared radiation
Nuclear radiation
Poisoned gases

Question 7: Which of the following is not a ozone depleting substances (ODS)?

methyl chloroform
methyl oxide
halons
chlorofluorocarbon

Question 8: In refrigeration system low pressure liquid is converted into low pressure vapour in …….

Accumulator
Condenser
Metering device
Evaporator

Question 9: ……………. mixture is called as ternary refrigerant blend.

Two-part
Three-part
Five-part
Six-part

Question 10: A compound gauge connected to low side of the refrigeration system measures the pressure in ……

Psig and in.hg
Psig and microns
Microns
Psia

Question 11: Any two refrigerants should not be mixed because

It is impossible to reclaim any mixture
It is impossible recover the mixture in same container
They may explode
The mixture may lead to corrosive

Question 12: Removing water vapor from refrigeration system is called as ….

Condensation
Evaporation
dehydration
Expansion

Question 13: The cooling occurs in vapor compression cycle refrigeration system, when …..

The refrigerant changes from liquid to vapor
The refrigerant changes from vapor to liquid
The refrigerant pressure increases
The refrigerant temperature decreases

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

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Source: EPA Section 608 (40 CFR Part 82)