Practice test

Delaware HVAC Practice 20

Practice 20 for HVAC Exam learners in Delaware: 25 questions, explained answers, and a review routine.

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Question 1

1

A facility runs three appliances: a 30-pound rooftop unit (10 percent leak), a 120-pound walk-in (28 percent), and a 60-pound comfort chiller (11 percent). Which require leak-repair action under 608 (appliances over 50 pounds)?

Question 2

2

To stay compliant during a 410A-to-lower-GWP retrofit, the recovered 410A and the new refrigerant must never be:

Question 3

3

An inspector requests two years of refrigerant records for a 200-pound system. The owner can demonstrate compliance only if records show:

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