Backflow Tester Practice Test
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Free backflow prevention questions on hydraulics, assemblies, field test procedures and cross-connection control programs. Every answer quotes its source.
Adaptive Practice Test
15–20 Questions Drawn From 159
Every attempt is a new test: questions are drawn at random and the answer order is shuffled. Score 80% or more and your next test moves up a level; score under 50% and it eases back. Your level is saved only in this browser.
Your Level Foundation
How This Practice Test Works
- Each attempt draws 15–20 questions at random from our pool of 159 and shuffles the answer order. Score 80% or more and the next test moves up a difficulty level; under 50% and it eases back.
- After every answer you see an explanation and the EPA manual reference behind it.
- We use 70% as a practice target. The ABPA written exam has 100 closed-book questions in 3 hours and needs 70%. You must also pass a performance exam on RP, DC, PVB and SVB assemblies.
- There is no sign-up. Your level is saved only in this browser.
These are original questions written by our editorial team from the published EPA manual. They are not real exam questions. Questions follow the EPA Cross-Connection Control Manual (2003). Local ordinances and ABPA or ASSE program rules may differ.
What the Question Pool Covers
Every question cites the rule behind its answer. Counting those references shows where the pool puts its weight:
| Reference | Questions |
|---|---|
| EPA Cross-Connection Control Manual (2003) | 159 |
Sample Questions With Worked Answers
A few questions from the pool with the answer and explanation, so you can see the style before you start.
How does the EPA manual define plumbing cross-connections?
Answer: Actual or potential connections between a potable and nonpotable water supply. Source text: “which are defined as actual or potential connections between a potable and nonpotable water supply…”
Reference: EPA Cross-Connection Control Manual (2003), Preface
In the 1933 Chicago epidemic cited by the EPA, what disease spread through defective plumbing?
Answer: Amebic dysentery. 1,409 people were infected and 98 died. Source text: “1,409 persons contracted amebic dysentery; there were 98 deaths…”
Reference: EPA Cross-Connection Control Manual (2003), Ch. 1
When does a contaminant enter the potable system through a cross-connection?
Answer: When the pressure of the polluted source exceeds the pressure of the potable source. Source text: “The contaminant enters the potable water system when the pressure of the polluted source exceeds the pressure of the potable source…”
Reference: EPA Cross-Connection Control Manual (2003), Ch. 1
Study Before You Test
- Backflow Tester Certification Guide
- Backflow Tester Mock Exam
- Journeyman Plumber Exam Prep