11 trades, 1,688+ questions, full explanations, mock exam mode, topic filters. No account required — just pick your trade and start.
Enter your Red Seal exam date and we'll track exactly how many days you have to prepare.
Red Seal says each exam's questions are developed to assess the activities laid out in the trade's Red Seal Occupational Standard (RSOS), and exams move to a new standard over time, so check which standard your exam uses. Questions here are organised into this site's own study topics, which do not map one-to-one onto the standard's Major Work Activities, and every answer carries a written explanation rather than just the correct letter. Banks are reviewed regularly for accuracy.
All practice material is completely free — no signup, no paywall, no credit card. The site is funded by optional Ko-fi support and the paid PDF question banks.
Drill specific topic blocks — focus on your weak areas instead of practising what you already know.
Timed practice exam drawn from every topic in the practice bank. Results saved in your score history.
Every question you answer incorrectly is automatically saved for targeted review.
Accuracy bars per topic block — see exactly where you're strong and where you need work.
Flip-card interface for quick review of key concepts without committing to full question format.
Daily streak tracking counts the days in a row you study.
Start with your trade. If you're registered in a 421A apprenticeship, go to the 421A quiz. If you're a 310T apprentice, go to 310T.
If you're unsure which trade applies to you, see the Red Seal Trades Guide for a full comparison of all 11 trades covered on this site, or use the Which Trade Should I Choose? guide.
The largest question bank on this site. Covers safety, diesel engines, hydraulics, electrical systems, powertrain, and braking. Includes detailed explanations referencing real-world diagnostic scenarios.
Topics: Safety · Engine · Hydraulics · Electrical · Powertrain · Brakes
Start 421A Quiz →↓ Free 50-question 421A mock exam PDFAll 406 questions & answersPrintable bank + revision notes CA$29 →Covers the 310T exam's topic areas with emphasis on air brake systems. Includes regulations & inspections and J1939 CAN bus diagnostic questions.
Topics: Air Brakes · Engine · Electrical · Drivetrain · Regulations & Inspections · Cab/Body
Start 310T Quiz →↓ Free 50-question 310T mock exam PDFAll 161 questions & answersPrintable bank + revision notes CA$24 →Covers CEC code application, box fill calculations, motor circuit protection, three-phase load calculations, and wiring methods. Strong focus on the calculation-heavy sections.
Topics: CEC Rules · Wiring Methods · Motors · Theory · Safety · Special Occupancies
Start 309A Quiz →↓ Free 50-question 309A mock exam PDFAll 131 questions & answersPrintable bank + revision notes CA$24 →Covers the modern 310S exam with strong emphasis on electrical diagnostics and engine management — two of the three largest blocks on the official breakdown — electrical and comfort control (23 questions) and engine and engine support (22), 45 of the 125 questions (36%). Includes CAN bus, oscilloscope interpretation, and ADAS system questions.
Topics: Engine · Electrical · Brakes · Suspension · Drivetrain · HVAC
Start 310S Quiz →↓ Free 50-question 310S mock exam PDFAll 139 questions & answersPrintable bank + revision notes CA$24 →Covers vapour-compression cycle theory, P-H diagram analysis, refrigerant properties and regulations, compressor types, VFD controls, and CSA B52 code applications. Includes questions on low-GWP refrigerants now in use.
Topics: Refrigeration Cycle · Refrigerants · Compressors · Controls · Heat Exchangers · Codes
Start 313A Quiz →↓ Free 50-question 313A mock exam PDFAll 115 questions & answersPrintable bank + revision notes CA$19 →Covers all major welding processes (SMAW, GMAW, GTAW, FCAW, OFC), weld discontinuity identification, metallurgy, distortion control, and AWS/CSA weld symbols. Tests theory — not just technique.
Topics: SMAW · GMAW · GTAW · FCAW · Metallurgy · Safety · OFC · Weld Symbols
Start 456A Quiz →↓ Free 50-question 456A mock exam PDFAll 125 questions & answersPrintable bank + revision notes CA$19 →Covers DWV sizing (fixture unit method), venting configurations, water supply sizing, backflow prevention, gas piping (CSA B149.1), and National Plumbing Code applications. Explanations reference specific NPC sections.
Topics: DWV · Water Supply · Fixtures · Gas Piping · NPC Code · Safety
Start 306A Quiz →↓ Free 50-question 306A mock exam PDFAll 130 questions & answersPrintable bank + revision notes CA$24 →Covers motors, VFD programming and diagnostics, PLC ladder logic (with diagrams), process instrumentation (4–20 mA, HART), industrial CEC applications, hazardous locations, and arc flash protection.
Topics: Motors · VFDs · PLCs · Instrumentation · Power Systems · Hazardous Locations
Start 442A Quiz →↓ Free 50-question 442A mock exam PDFAll 130 questions & answersPrintable bank + revision notes CA$24 →Structural steel erection, rigging and hoisting calculations, reinforcing rod (rebar) placement, fall protection, welding for structural connections, blueprint reading, and tools & equipment.
Topics: Structural Steel · Rigging · Welding · Blueprints · Rebar · Safety · Tools
Start 420B Quiz →↓ Free 50-question 420B mock exam PDFAll 121 questions & answersPrintable bank + revision notes CA$19 →Gas supply systems, appliance installation and service, venting and combustion air, combustion theory, piping and pressure systems, safety, and CSA B149.1 code application.
Topics: Gas Supply · Appliances · Venting · Combustion · Piping · Safety
Start Gasfitter Quiz →↓ Free 50-question Gasfitter mock exam PDFAll 110 questions & answersPrintable bank + revision notes CA$19 →Layout and pattern development (parallel line, radial line, triangulation), SMACNA duct construction standards, architectural sheet metal, installation, materials, and safety.
Topics: Pattern Development · Duct Systems · Architectural Metal · Materials · Safety
Start 308A Quiz →↓ Free 50-question 308A mock exam PDFAll 120 questions & answersPrintable bank + revision notes CA$19 →One way to use this tool:
Yes — all practice questions on this site are completely free. No account, no email, no credit card required. Just open the quiz for your trade and start practising.
There are 1,688 practice questions across 11 Red Seal trades: 421A (406), 310T (161), 310S (139), 309A (131), 306A (130), 442A (130), 456A (125), 420B (121), 308A (120), 313A (115), and Gasfitter Class A (110). All questions include full explanations.
Start with the quiz for your trade. The codes on this site, such as 309A or 456A, are Ontario's trade codes, so if you're not sure which quiz matches your apprenticeship, or you're undecided, see our trades comparison guide.
Red Seal says each exam's questions are developed to assess the activities in the trade's occupational standard. When Red Seal publishes a new standard, exams move to it over time — SkilledTradesBC, for example, has used 420B exams aligned to the 2025 standard since August 31, 2026, while red-seal.ca's 420B trade page still says exams based on the new standard are under development — so check which standard your exam uses with your apprenticeship authority. This site's questions use the exam's four-option multiple-choice format, and its mock exams draw on the site's own practice topics rather than the official exam distribution, which Red Seal publishes on each trade's exam information page.
Mock Exam mode generates a timed practice exam in the real exam's four-option multiple-choice format, drawing questions from every topic in that trade's practice bank rather than from the official exam distribution. Sessions run from 25 questions up to 60–125 depending on the trade, with a countdown timer. Your recent mock scores are saved in your browser and shown under Recent Mock Scores on the quiz page.
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