1. About the CCQ Plumber exam

The Plumber (Plombier) qualification exam is the official theoretical evaluation administered by the Commission de la construction du Québec (CCQ). Plumbers install, modify, maintain, and repair plumbing systems — sanitary drainage, storm drainage, venting, and potable water distribution — on Quebec construction sites. Passing this exam is a key step toward obtaining a journeyman competency certificate.

The exam covers three sections weighted as follows: Installing and modifying plumbing systems (65%), Maintaining plumbing systems (15%), and Repairing plumbing systems (20%). It is offered in French and English in multiple-choice format and lasts approximately 3 hours, with a passing grade of 60%.

2. Exam structure at a glance

Section 1 dominates almost entirely — nearly two-thirds of the exam. Installation is by far the largest part of the trade's day-to-day work, and the exam reflects that. Maintenance (15%) and repair (20%) cover the smaller but mandatory portions of the trade.

3. Detailed competency elements

Section 1 — Installing and modifying plumbing systems (65%)

• Interpret plans and specifications
• Take safety measures
• Take measurements for pipe routing across four systems: sanitary drainage, storm drainage, venting, and potable water distribution
• Install supports and anchors
• Place and connect production equipment, sanitary fixtures, devices, and accessories
• Perform calculations on various types of piping
• Install pipes and drains
• Leak-test the network, commission the system, and perform adjustments
• Apply plumbing system modification procedures
• Decommission a plumbing system

Section 2 — Maintaining plumbing systems (15%)

• Maintain piping for wastewater, storm water, recovered water, and process water
• Maintain piping for domestic water
• Maintain fixtures and their components
• Perform tests on fixtures or pipework

Section 3 — Repairing plumbing systems (20%)

• Diagnose problems in a plumbing system
• Perform repair or replacement of pipes or fixtures
• Test the plumbing system and return it to service

4. Documents provided at the exam

This is a defining feature of all CCQ trade qualification exams: unlike RBQ contractor exams (some of which are open book), CCQ exams are systematically closed book regardless of the trade. Plan your study accordingly.

5. Recommended study documents

The CCQ recommends the following references for preparation. None of them will be available during the exam — they are study aids only. Use them to build understanding, then test recall with practice questions and flashcards.

• Quebec Construction Code, Chapter III — Plumbing, and National Plumbing Code of Canada 2015 (amended) — National Research Council of Canada, Ottawa, 2021
• Installation de plomberie dans une résidence (Residential Plumbing Installation) — Légaré, Michel, Publications du Québec, Sainte-Foy, 2003, 267 p.
• Plomberie et tuyauterie (Plumbing and Piping) — Modus Vivendi, Montréal, 2009, 79 p. (modusaventure.com)
• Canadian Wood-Frame House Construction — Burrows, John, Canada Mortgage and Housing Corporation (CMHC / SCHL), Ottawa, 2013, 432 p. (free online at cmhc-schl.gc.ca)
• Schémas explicatifs — Plomberie (Plumbing Explanatory Diagrams, 3rd edition) — CMMTQ (Corporation des maîtres mécaniciens en tuyauterie du Québec), under the direction of Henri Bouchard, Montréal, 2021, 132 p.

6. What makes the Plumber exam different

The Plumber trade is heavily code-driven. The Quebec Construction Code, Chapter III (Plumbing) — together with the National Plumbing Code of Canada 2015 (amended) — is the authoritative reference for the entire trade. It governs pipe sizing, drainage fixture unit (DFU) values, water supply fixture unit (WSFU) calculations, venting rules, trap seal protection, backflow prevention, and clearances. Nearly every Section 1 question and most of Sections 2 and 3 trace back to a Chapter III rule. The closed-book format means the candidate must know the structure of the code and the critical tables from memory.

Section 1 weighing 65% reflects the field reality of the trade. A plumber spends the majority of their time installing new plumbing systems — sanitary drains, storm drains, vent stacks, water supply piping, and the fixtures and devices that connect to them. The exam covers four distinct system types in Section 1: sanitary drainage, storm drainage, venting, and potable water distribution. Each has its own routing, sizing, and connection rules, and a candidate who is strong on one but weak on another will struggle.

Section 3 (Repair, 20%) tests diagnostic ability — identifying the root cause of a problem from observed symptoms (a leak, a blockage, a fixture failure, slow drainage, water hammer) before reaching for a wrench. Field-experienced plumbers know how to fix problems; the exam tests whether they can articulate the diagnostic logic. Because the exam is closed book, the platform also tracks what you've actually memorized — flashcards spaced over multiple sessions surface weak areas before exam day.

7. Recommended preparation strategy

1. Anchor preparation around the Quebec Plumbing Code (Chapter III). It is the foundation of Section 1 (65%) and threads through Sections 2 and 3. Master pipe sizing, DFU and WSFU calculations, venting rules, trap seal protection, and backflow prevention.
2. Treat the exam as closed book from day one. Memorize DFU tables, pipe sizes, vent terminations, slope requirements, and trap seal depths — you will not have a code book to consult.
3. Read the recommended documents in this order: Quebec Construction Code Chapter III + NPC 2015 (the foundation), then CMMTQ's Schémas explicatifs (visual reference for code application), then Légaré's Installation de plomberie dans une résidence (residential systems depth), then Burrows's Canadian Wood-Frame House Construction (rough-in coordination with framers), then Modus Vivendi's Plomberie et tuyauterie for general overview.
4. Drill pipe sizing calculations. DFU values, WSFU values, slope, and capacity tables are common Section 1 topics — high-yield content if memorized.
5. Cover all four system types separately. Sanitary, storm, venting, potable water — each has its own rules. Don't let strength in one system mask weakness in another.
6. Practice diagnostic scenarios for Section 3. Symptoms-to-cause reasoning is testable — a backflow signal, slow drainage in one branch but not another, water hammer on shutoff. Memorize the common failure modes for each.
7. Take at least two full mock exams under real conditions (3 hours, no documents, single sitting) before scheduling the real exam.
8. Review every wrong answer. The Prof-RBQ.ca platform shows the reasoning behind each correct answer — read every explanation, even on questions you got right.

8. Why Prof-RBQ.ca for the Plumber exam

• Aligned with the official CCQ structure — content mapped one-to-one to the three sections, with heavy emphasis on Section 1 (65% of the score) and code-rule coverage anchored to QCC Chapter III and NPC 2015.
• Closed-book training methodology — flashcards and spaced practice designed for memorization of code tables, sizing rules, and venting requirements.
• Mock exams in CCQ format — multiple choice, 3-hour timing, scoring out of 60% — so exam day feels familiar.
• Detailed answer explanations — every question, right or wrong, comes with a written rationale tied back to the relevant code rule or theoretical principle.
• Bilingual — full course in English and French. The CCQ exam itself is offered in both languages.
• A free section is available so you can try the platform before committing.

Frequently asked questions