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EPA 608 NEC 2023

EPA 608 Core Exam Practice Test 8

Free Online Practice Test: EPA 608 Core Exam -8

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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 8 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 8 — Question List

Question 1: Which of the following layer of earth atmosphere that surrounds us?

Troposphere
Stratosphere
Hemisphere
None

Question 2: The blended refrigerant charged in a system may leak from a system ……..

Faster than other systems
Slower than other systems
At uneven rates due to different pressures
At the coupling points only

Question 3: Which refrigerant is a CFC?

R-12
R-500
R-124
R-410 A

Question 4: If the technician failed to demonstrate proper recovery and reclaiming procedures when EPA requires Then ……..

The technician certificate will be revoked
The recovery equipment and recovery cylinders will be seized
The cylinders recently purchased and still in his possession will be seized
The technician will be advised to attend refrigeration training camp

Question 5: Which of the following is usually central port of the manifold gauge?

Yellow hose
Red hose
Blue hose
White hose

Question 6: Heat flows from a material at ………………….. to material at ………………..

higher temperature, lower temperature
lower temperature, higher temperature
higher pressure , lower pressure
lower pressure to higher pressure

Question 7: Which of the following refrigeration circuit components does not modify the pressure of the refrigerant?

Condenser and evaporator
Compressor and evaporator
Expansion valve and compressor
Condenser and compressor

Question 8: What is the purity standard that the reclaimed refrigerant should meet to be resold or reused in any other system?

ARI 700
ARI 741
EPA 608
EPA 609

Question 9: Only ……………. technicians can buy CFC 12 refrigerant in containers smaller than 20 pounds.

EPA Section 609 certified
EPA Section 608 certified
EPA section 608 type 1 certified
EPA section 608 type 2 certified

Question 10: Recovery device which takes the assistance of appliance compressor in refrigerant recovery is considered as ………..

Self-contained recovery machine
System dependent recovery machine

Question 11: What is the preferred detector for detecting the small refrigerant leaks?

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

Question 12: The speed of the refrigerant recovery depends on …………..

Size of the refrigeration circuit only
Ambient temperature only
Type of refrigerant only
Size of circuit and ambient temperature

Question 13: What should be followed with a gauge set hose to be used in evacuating a system?

Hose length should be smaller
Hose diameter should be equal to vacuum pump inlet or larger
Hoses should be fitted with low loss fittings
Hose diameter should be less than vacuum pump inlet

Question 14: The EPA requires that the recovery cylinders must be filled above …………….. of its capacity

80%
85%
90%
95%

Question 15: The pressurized nitrogen should always charged through a …………………… into the system.

Metering device to monitor the pressure
Pressure regulator to control the pressure
On/Off valve to cut-off when required pressure is reached
Compressor to increase the nitrogen pressure

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)