EPA 608 Type III Practice Test

Practice EPA 608 Type III questions for low-pressure chillers, purge units, leak testing, evacuation and recharging.

What the Type III Section Covers

Low-pressure appliances, primarily chillers, including evacuation levels and vacuum pump requirements.

10 Free EPA 608 Type III Practice Questions

Try these Type III questions free, no account required. Each one includes an explanation of the correct answer.

0 of 10 answered

Question 1 of 10

A LOW-pressure appliance uses a refrigerant with a boiling point:

Above 10°C (50°F) at atmospheric pressure

Between -50°C and 10°C

Below -100°C

Below -50°C

Show answer & explanation

Correct answer: Above 10°C (50°F) at atmospheric pressure

Per the EPA Section 608 Type III exam content: Above 10°C (50°F) at atmospheric pressure

Question 2 of 10

Low-pressure systems (large chillers) operate:

Below atmospheric pressure (in a vacuum)

At exactly atmospheric pressure

Above 500 psig

Above 200 psig

Show answer & explanation

Correct answer: Below atmospheric pressure (in a vacuum)

Per the EPA Section 608 Type III exam content: Below atmospheric pressure (in a vacuum)

Question 3 of 10

In a low-pressure system, a leak usually means:

Nothing enters or leaves

Oil leaks out first

Air and moisture leak INTO the system (rather than refrigerant leaking out)

Refrigerant sprays out rapidly

Show answer & explanation

Correct answer: Air and moisture leak INTO the system (rather than refrigerant leaking out)

Per the EPA Section 608 Type III exam content: Air and moisture leak INTO the system (rather than refrigerant leaking out)

Question 4 of 10

Excessive operation of the purge unit on a low-pressure chiller indicates:

A properly sealed system

Low oil level

Too much refrigerant

A leak allowing air/moisture into the system

Show answer & explanation

Correct answer: A leak allowing air/moisture into the system

Per the EPA Section 608 Type III exam content: A leak allowing air/moisture into the system

Question 5 of 10

A purge unit removes non-condensables from what part of a low-pressure chiller?

The top of the condenser

The suction line

The oil sump

The bottom of the evaporator

Show answer & explanation

Correct answer: The top of the condenser

Per the EPA Section 608 Type III exam content: The top of the condenser

Question 6 of 10

The preferred method to raise pressure for leak-testing a low-pressure chiller is:

Oxygen

Controlled hot water or heater blankets (built-in heat/pressurization)

Boiler steam directly

Compressed air

Show answer & explanation

Correct answer: Controlled hot water or heater blankets (built-in heat/pressurization)

Per the EPA Section 608 Type III exam content: Controlled hot water or heater blankets (built-in heat/pressurization)

Question 7 of 10

When pressurizing a low-pressure system for leak testing, pressure must stay below:

15 psig

50 psig

10 psig

25 psig

Show answer & explanation

Correct answer: 10 psig

Per the EPA Section 608 Type III exam content: 10 psig

Question 8 of 10

The rupture disk on a low-pressure centrifugal chiller typically releases at about:

5 psig

50 psig

10 psig

15 psig

Show answer & explanation

Correct answer: 15 psig

Per the EPA Section 608 Type III exam content: 15 psig

Question 9 of 10

When recharging a low-pressure system you should introduce which phase first?

Liquid first

Vapor first, until pressure/temperature is above freezing

Oil first

Either, it doesn't matter

Show answer & explanation

Correct answer: Vapor first, until pressure/temperature is above freezing

Per the EPA Section 608 Type III exam content: Vapor first, until pressure/temperature is above freezing

Question 10 of 10

Charging liquid into a deep vacuum on a low-pressure chiller is dangerous because:

It creates phosgene

It over-pressurizes instantly

The liquid flashes, dropping temperature enough to freeze and rupture water tubes

It is perfectly safe

Show answer & explanation

Correct answer: The liquid flashes, dropping temperature enough to freeze and rupture water tubes

Per the EPA Section 608 Type III exam content: The liquid flashes, dropping temperature enough to freeze and rupture water tubes

Practice the Full Type III Question Bank

The complete Type III section has 170 practice questions. The first 5 of each practice session are free — unlock full access to keep going.

More Ways to Prepare

Start a timed EPA 608 Type III exam simulation
Try the EPA 608 Universal practice test covering Core, Type I, Type II and Type III together
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Read the EPA 608 study guide
Learn about the EPA 608 test format

Disclaimer: This site is an independent study tool and is not affiliated with or endorsed by the EPA. The sample questions are for practice purposes only and are not official EPA 608 exam content.