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EPA 608 NEC 2023

EPA 608 Type 3 Exam Practice Test 2

Free EPA 608 Practice Test: Type 3 Exam

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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 2 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

10

Questions

15 min

Time

70%

Pass

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EPA 608 Type 3 Exam Practice Test 2 — Question List

Question 1: In a low pressure system, if the maximum pressure setting exceeds during leak checking …………………….

Causes a rupture failure
Causes systems body failure
Increases the leak point

Question 2: If some amount of air exists in low pressure system …………….

Causes low head pressure
Causes high head pressure
Causes low suction pressure
Causes high suction pressure

Question 3: A partial charge low pressure system can be effectively leak checked by ……………

Compressed air
Pressurized liquid nitrogen
Adding high pressure HCFC-22 refrigerant
Increasing refrigerant pressure by adding external heat source.

Question 4: What is the purpose of rupture disks in low pressure chillers?

To relieve the pressure
To increase the pressure
To remove trapped moisture
To increase temperature in system

Question 5: When recharging refrigeration system with CFC-11, what vacuum is necessary in the shells before charging?

16.9 Hg vacuum
15.4 Hg vacuum
17 Hg Vacuum
14.7 Hg Vacuum

Question 6: What will happen if the refrigeration system is not evacuated fully?

Compressor head pressure rises
Moisture still remains in the system
Refrigerant vapour exists in the system
Evaporator coil may fail

Question 7: ………………. Is the Typical pressure for opening the rupture disk in the low pressure chillier

14 PSIG
15 PSIG
24 PSIG
12 PSIG

Question 8: What is the purpose of purge unit on chiller?

Minimizes the effects of contamination
Minimizes air leakage in to system
Purges the moisture and prevents it to enter in the system
Increases the efficiency of the system

Question 9: In a low pressure refrigeration system the rupture disk is connected to ………………..

Evaporator
Condenser
Receiver
Liquid pump

Question 10: The purpose of circulating water during the evacuation chiller refrigeration system is to …………..

Prevent the leakage of refrigerant to atmosphere
Prevent the freezing of water
Prevent the leakage of the air
Prevent freezing of refrigerant

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)