Wrong move
Direct answer
The risky shortcut is calling any open pipe above a drain an air gap. An air gap is a physical separation that protects potable water or waste connections; an air break is an indirect waste separation that does not provide the same protection level.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as Backflow prevention and drill a smaller set before returning to mixed practice.
Prep path
Plumbing License Study Guide
Independent plumbing license study guide for drainage, venting, traps, water supply, fixture units, and code review.
SamplesPlumbing License Sample Questions
Public Plumbing License Practice Test sample questions with explanations.
PracticeOpen Plumbing License Practice Test
Start with the 15-question free set before deciding whether to unlock the paid bank.