11.4 Practice Exam: Type I, II, and III
Key Takeaways
- Type I: focus on small appliance recovery rates (90%/80%), passive vs. active recovery, and old refrigerants
- Type II: focus on leak rates (10/20/30%), oil changes (5 psig), R-22 retrofit, and zeotropic charging
- Type III: focus on vacuum operation, purge units, tube failure/water contamination, and 25 mm Hg recovery
- Practice questions should be answered under timed conditions to simulate the actual exam
- Review any questions you get wrong and revisit the corresponding study sections
Test your type-specific knowledge with these practice questions covering all three certification types.
Type I Practice Questions
How to Use This Practice Set
Treat these questions as an active-recall checkpoint for Practice Exam: Type I, II, and III, not as a reading assignment. Answer the full set before looking at explanations, then mark each miss by skill area, rule, or service name. For every wrong answer, write the reason the correct option wins and why one tempting distractor fails. That habit matters because real exam questions often test the same concept with different wording. If you miss several questions from the same domain, pause and reread that chapter before continuing.
A strong final review loop is: timed attempt, explanation review, targeted reread, then a second attempt after a short break.
Review Routine
After you finish this set, make a three-column log: topic, missed rule, and the clue you should have noticed. Retake only missed questions the next day, then mix them with new questions so you do not memorize order. For calculations or scenario rules, say the first step aloud before choosing an option; that prevents rushing into a familiar but wrong answer.
A household refrigerator contains 8 ounces of R-134a. It is classified as:
What type of recovery equipment relies on the appliance's own compressor or pressure?
A technician is recovering refrigerant from a dehumidifier with a non-working compressor. After using passive recovery techniques, only 75% of the charge has been recovered. What should the technician do?
Type II Practice Questions
A comfort cooling system with 75 lbs of R-410A has had 10 lbs added over the past 12 months. What is the annualized leak rate?
When retrofitting a system from R-22 to R-407C, which of the following is NOT required?
At what pressure must the system be before changing compressor oil on a high-pressure system?
Non-condensable gases in a high-pressure system cause:
Type III Practice Questions
What happens when a tube fails in the evaporator of a low-pressure chiller?
A purge unit on a centrifugal chiller draws its mixture of refrigerant vapor and non-condensable gases from:
Why must the oil sump heater on a centrifugal chiller remain energized during extended shutdowns?
What must be done to a low-pressure system before opening it for service?