Previous EPA 608 Core Exam Practice Test 8 Next EPA 608 Core Exam Practice Test 10

EPA 608 NEC 2023

EPA 608 Core Exam Practice Test 9

Free Online Practice Tests: EPA 608 Core Exam -9

TOPICS COVERED

epa 608 practice tests

How this test works

Read each question carefully

Look for absolute words like always / never — they often distinguish the right answer.

Manage your time

You have 23 min for 15 questions. Skip tough ones and come back.

Progress is auto-saved

Your answers are saved locally — a page refresh won't lose your work.

Review your answers

After submitting you'll see every explanation and your NEC references.

Frequently Asked Questions

Yes — completely free with no account needed.

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 9 has 15 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: 15 multiple-choice, one correct answer each

15

Questions

23 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

EPA 608 Core Exam Practice Test 9 — Question List

Question 1: What will happen if the system is pressurized with oxygen or compressed air?

When mixed with oil or refrigerant they can cause an explosion
When mixed with refrigerant, the pressure in the system will increase unusually
The compressed air can damage the suction line filter placed before the compressor
The oxygen mixture with oil will damage compressor

Question 2: CFC’s are lighter than air.

True
False

Question 3: One chlorine atom can break apart more than …………………. Ozone molecules

1,00,000
10,00,000
10,000
1000

Question 4: The compressor is located in …………… part of the refrigeration circuit?

Vapour
Liquid

Question 5: The liquid boiling point in the closed loop system can be controlled by changing …………… above it.

Vapour temperature
Vapour pressure
Vapour volume
Vapour flow

Question 6: A high pressure gauge in manifold gauge set is usually ………… in color.

red
blue
yellow
white

Question 7: When the air present inside the refrigeration circuit …

The pressure at high pressure side reads unusually high
The pressure at high pressure side reads unusually low
The pressure at Low pressure side reads unusually high
The pressure at low pressure side reads unusually low

Question 8: The process which removes the moisture and oil from and the refrigerant and chemically tests the refrigerant is

Recycling
Reclaiming
Recovery
Disposal

Question 9: Refrigerant recovery equipment manufactured after ……………… must be certified and labeled by the EPA approved equipment testing agency to meet EPA standards

November 15, 1993
July 2, 1987
November 14, 1994
June 16, 1989

Question 10: HFC refrigerant leak cannot be detected by following detector?

Electronic detector
Halide leak detector
Ultrasonic leak detector
Fluorescent Dye Leak Detector

Question 11: Which of the following refrigerant is drop-in substitute of R-12?

R-22
R-134a
R-234
none

Question 12: The speed of the evacuation depends on

Size of the system
Ambient temperature
Quality of the moisture
All

Question 13: For maximum security what should be done to the cylinder before disposal?

Recovery the remaining refrigerant
Heat with the open flame to check for any refrigerant leaks
Cylinder should be punctured

Question 14: The suction line up to the compressor is iced up in air conditioning unit, what would be the indication?

A clean evaporator coil
An improper function of expansion valve
Under charge of refrigerant
Over charge of refrigerant

Question 15: The refrigerant recovered from refrigeration system …………….

without any restriction it can be returned to same or other system owned by same person
can be returned to another system if it is charged with same refrigerant
can be sold to another costumer
can be said it is reclaimed if the oil is filtered

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

Questions15

Time limit23 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)