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North Dakota HVAC Practice 16

Practice 16 for HVAC Exam learners in North Dakota: 25 questions, explained answers, and a review routine.

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Question 1

1

A Universal-certified technician recovers R-22 from a rooftop unit, then needs to recover R-123 from a chiller. The Universal card:

Question 2

2

Before disposing of a small appliance such as a window AC, the disposer (e.g., scrap yard) must verify:

Question 3

3

An evacuation that will not break below 5,000 microns despite a good pump usually means:

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