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EPA 608 NEC 2023

EPA 608 Type 3 Exam Practice Test 1

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 1 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 1 — Question List

Question 1: 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

Question 2: What should be done after recovering liquid refrigerant from refrigeration system?

Recover the vapour refrigerant
Remove the moisture in the system
Remove the oil from the system
Purge the system with pressurized nitrogen

Question 3: The hydrostatic test is used to check ………………….. within a chiller?

Moisture leaks
Tubing leaks
Compressor failure
Air leaks

Question 4: The purge compressor is typically connected on top of ………………. In low pressure chiller refrigeration system.

Condenser
Oil separator
Chiller
Purge drum

Question 5: Which of the following is the lowest access point on the low pressure centrifugal air-conditioning unit?

The evaporator charging valve
The condenser service valve
The purge unit exhaust valve
The chiller exhaust valve

Question 6: If the liquid charging into the refrigeration system is under 29 Hg vacuum then ………………….

The charging time increases
The water in the system freezes
The refrigerant may freeze in the system
The vapour in the system freezes

Question 7: In the idle low pressure system the lowest pressure that should be maintained is slightly above than ………………………

Atmospheric pressure
15 PSIG
Refrigerant tank pressure

Question 8: In a low pressure refrigeration system the rupture disk is connected to ………………..

Evaporator
Condenser
Receiver
Liquid pump

Question 9: 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 10: What is the maximum pressure setting of a recovery unit which is used to evacuate the refrigerant from low pressure chillier?

5 PSIG
10 PSIG
15 PSIG
20 PSIG

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)