EPA 608 Type II · Refrigeration Fundamentals · Medium
What prevents refrigerant from migrating to the compressor oil during the off-cycle?
Answer: B. A crankcase heater.
- AAn accumulator.
- BA crankcase heater.✓ Correct
- CA liquid receiver.
- DA filter-drier.
Why B is right
The crankcase heater keeps the oil warm, preventing refrigerant vapor from condensing into it.
More Type II questions
- Why must you never start a hermetic compressor while it is in a deep vacuum?
- What service pressure rating must a recovery cylinder have to hold R-410A?
- Recovering R-454B, an A2L refrigerant, requires what kind of recovery machine?
- R-22 has a saturation pressure of about 220 psia at 104°F. Which EPA category does an R-22 appliance fall in?
- At 104°F, R-134a has a saturation pressure of about 147 psia. Which EPA pressure category is that?
Go deeper with the study guide EPA 608 Core Exam: Study Guide for 2026, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.