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Question 1
When evacuating a residential split-system refrigerant circuit before charging, to what vacuum level should a technician pull the system to ensure moisture and non-condensables are removed?
Correct Answer:
500 microns or lower
Question 2
Which instrument must be used to accurately confirm that a system has reached a deep vacuum during evacuation?
Correct Answer:
Micron (electronic vacuum) gauge
Question 3
After evacuating a new installation, a technician closes the valve to the vacuum pump and watches the micron gauge. The reading rises and stabilizes at about 1,200 microns. What does this decay test most likely indicate?
Correct Answer:
Remaining moisture boiling off inside the system
Question 4
Which charging method is preferred for a new installation when the manufacturer publishes the exact factory charge plus a per-foot adjustment for line-set length?
Correct Answer:
Weigh-in (charge by weight) method
Question 5
A condensing unit ships with a factory charge sufficient for 15 feet of line set. The actual installation uses a 40-foot line set, and the manufacturer specifies adding 0.6 oz of R-410A per foot beyond 15 feet. How much additional refrigerant must be weighed in?
Correct Answer:
15 oz
Question 1
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About this Exam

Prepare with the NATE AC Installation Practice Questions - NATE Air Conditioning Installation Specialty Exam practice quiz. This question bank includes 100 questions covering unit, refrigerant, installation, line, and installed. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NATE AC Installation Practice Questions - NATE Air Conditioning Installation Specialty Exam

This practice set contains 100 questions from the matching question bank and focuses on unit, refrigerant, installation, line, and installed. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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