Exam use
Direct answer
What is the main concern with a cross connection can appear as a definition, a scenario, a calculation setup, a safety judgment, or a best-next-step question. Start from the plain meaning: Cross connections can allow contaminants to enter the potable water system. Then compare it against related areas like Trade math, Drainage and venting concepts, Water supply concepts before choosing an answer.
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 Sample 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.