EPA 608 Type 3 Practice Test
Type III certifies you to service and dispose of low-pressure appliances, mostly centrifugal chillers using refrigerants like R-123 that run below atmospheric pressure.
Core and Type III, 25 questions each, timed and scored separately at 70%, with cited explanations. The pass also unlocks the full Universal exam.
Or try the free Type III drillWhich method may be used to raise an R-123 chiller to 0 psig for a non-major repair?
What the Type III section covers
25 multiple-choice questions, 70% (18 correct) to pass. Your Type result counts only with a passing Core score.
- Leak detection
- Hot water or a built-in heating device first, nitrogen next, the 10 psig test limit and the 15 psig rupture disc.
- Evacuation and repairs
- The 25 mm Hg absolute level, major vs non-major repairs and raising a chiller to 0 psig.
- Recovery and recharging
- Liquid then vapor, heating oil to 130°F, keeping tube water from freezing, and charging vapor first.
- Purge units and safety
- Why low-pressure systems draw in air, what the purge unit does, and ASHRAE 15 machinery-room sensors.
Sit Core and Type III under the clock
Core and Type III, 25 questions each, timed and scored separately at 70%, with cited explanations. The pass also unlocks the full Universal exam.
Or try the free Type III drillCommon questions
Why do low-pressure chillers leak inward?
Their evaporators run below atmospheric pressure, so a leak draws air and moisture into the system instead of letting refrigerant out. A purge unit removes those noncondensables.
What is the maximum leak test pressure for a low-pressure chiller?
10 psig. The evaporator rupture disc relieves at 15 psig.
Core and Type III, 25 questions each, timed and scored separately at 70%, with cited explanations. The pass also unlocks the full Universal exam.
Or try the free Type III drillMore EPA 608 practice
Sources
Original independent practice written from 40 CFR Part 82 Subpart F and EPA guidance. Not affiliated with or endorsed by the U.S. Environmental Protection Agency or any certifying organization.