Practice test

HVAC Practice Exam 18

Master HVAC practice exam 18: 25 scenario and calculation questions on leak-rate math, sensible heat ratio, balance point, and auxiliary heat sizing, explained.

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Question 1

1

A supermarket has a 1,000-pound R-407A rack. After a 35 percent annual leak and an unsuccessful repair, the owner adopts a one-year retrofit plan. During that year they must:

Question 2

2

Computing a leak rate: a 400-pound system needed 80 pounds added over the past 4 months to stay charged. The annualized leak rate is about:

Question 3

3

That 60 percent leak rate on a commercial refrigeration appliance over 50 pounds:

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