EPA 608 Universal

First published: September 2, 2026Last verified: September 2, 2026Reviewed by the CertQuestUSA team

TL;DR

EPA 608 Universal: a 140-question practice bank for the real EPA Environmental standard, 1 full paper of 100 questions each with no repeats, every question citing the real regulation it comes from.

Where these questions come from

Every question in this bank cites a real source -- primarily 40 CFR (100%) of this exam's citations.

Not sure where you stand? Take the free diagnostic — 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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1

full paper

100

questions per paper

140

questions in the bank

What this exam covers

Core (all technicians)25%
Type I — Small Appliances25%
Type II — Medium/High-Pressure25%
Type III — Low-Pressure Appliances25%

5 real sample questions

Which class of refrigerants was the original driver behind the Montreal Protocol and the U.S. regulations that followed it?

A. Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs)

B. Ammonia-based refrigerants used in industrial process cooling

C. Carbon dioxide refrigerants used in transcritical systems

D. Water-based absorption refrigerants

Source: 40 CFR 82.150

Which certification type is required to legally service a household refrigerator (a factory-sealed unit with a small refrigerant charge)?

A. Type I (or Universal, which includes Type I)

B. Type II only

C. Type III only

D. No certification is required for household refrigerators

Source: 40 CFR 82.161(a)(1)

Why does the EPA regulate the handling of refrigerants under the Clean Air Act?

A. Refrigerants released to the atmosphere can deplete the stratospheric ozone layer or contribute to climate impact

B. Refrigerants are flammable and pose a fire code violation if not tracked

C. Refrigerant cylinders are considered hazardous waste containers under RCRA

D. Refrigerant sales generate excise tax revenue that must be reported to EPA

Source: 40 CFR 82.150

Which certification is required to legally service a household window air conditioning unit?

A. Type I (or Universal, which includes Type I)

B. Type II only

C. Type III only

D. Reclaimer certification

Source: 40 CFR 82.161(a)(1)

Which of the following is a very common example of equipment that typically falls under Type II certification in the field?

A. A residential split-system air conditioner or heat pump

B. A household refrigerator

C. A window air conditioning unit

D. A large industrial chiller using a low-pressure refrigerant

Source: 40 CFR 82.161(a)(1)

Real-world data for this exam

Heating, Air Conditioning, and Refrigeration Mechanics and Installers: real median wageMay 2025$61,010/yr

Frequently asked questions

How many questions are on the CertQuestUSA EPA 608 Universal practice test?

140 questions total, split into 1 full paper of 100 each with no repeats across papers.

What topics does the EPA 608 Universal test cover?

4 domains, with the heaviest weight on Core (all technicians) (25%), Type I — Small Appliances (25%), and Type II — Medium/High-Pressure (25%).

Where do CertQuestUSA's EPA 608 Universal questions come from?

Primarily 40 CFR (100%) of this bank's citations -- computed directly from this exam's own question sources, not a generic description.

Is there a free diagnostic for EPA 608 Universal?

Yes -- 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.