Practice test

HVAC Practice Exam 19

Master HVAC practice exam 19: the hardest questions on low-temperature refrigeration, line-set subcooling, dual-fuel switchover, and combustion tuning.

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These questions are for study practice only and are not official exam questions.

Question 1

1

A 2,000-pound R-410A industrial chiller leaks 18 percent annually. Even though it is below the older 30 percent industrial trigger, the owner is increasingly driven to act because:

Question 2

2

A technician reclaims refrigerant on-site with a machine but plans to resell it to a different facility. This is improper because resale-grade reclaim requires:

Question 3

3

An owner asks to skip the follow-up verification test after a repair to save time. The correct response is:

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