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EPA 608 NEC 2023

EPA 608 Type 3 Exam Practice Test 7

Take a Free Practice Test-7 EPA Certification Type 3

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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 7 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 7 — Question List

Question 1: Which of the following component directly following the evaporator in the refrigeration system?

Receiver
Metering device
Accumulator
Condenser

Question 2: The oil should be heater to ………………. F before removing it from refrigeration system to minimize the refrigerant leakage.

120 F
100 F
130 F
150 F

Question 3: What should be done when you reach required recovery vacuum on a system?

Immediately disconnect the recycling equipment and open the system for service
Immediately pressurise the system with nitrogen and open the system for service
See if the system pressure rises, indicating the small amount of refrigerant is trapped in system
Immediately pressurise with hydrogen and open the system for service

Question 4: In low pressure refrigeration system, ……………………. Should be added first until the refrigerant boiling point is above the freezing point.

Liquid
Vapor

Question 5: Every refrigeration system should be protected by ……………………..

Low pressure control device
Pressure relief device
Refrigerant recovery receiver
Stop valve

Question 6: If the refrigeration contains large amount of moisture, to prevent freezing of moisture during evacuation the system pressure can be increased with …………. Gas

Nitrogen
Oxygen
Hydrogen
Argon

Question 7: As ASHRAE guidelines, the pressure in the system increases from ……………………………. During vacuum testing then system should be leak checked.

1 mm Hg to 2.5 mm Hg
2 mm Hg to 3 mm Hg
1.5 mm Hg to 2 mm Hg
2mm Hg to 2.5 mm Hg

Question 8: Water must be circulated through chillers during evacuating a system to avoid ……………

Refrigerant Freezing
Refrigerant leaking
Water tube damage

Question 9: When evacuating a system the hoses should be ……………..

Short in length
Long in Length

Question 10: If non condensables present in the operating refrigeration system ………………………….

The refrigerant leak rate will increase
The discharge pressure increases
The moisture present in the system freezes
Spoils condenser coil

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)