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
11.4 Practice Exam: Type I, II, and III
Test your type-specific knowledge with these practice questions covering all three certification types.
Type I Practice Questions
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?