Red Seal Refrigeration & AC Mechanic (313A) Timed Mock Exam Simulator
Prepare for your Certificate of Qualification (C of Q) exam with our authentic 125-question 4-hour simulation. Built precisely to the National Occupational Standard blueprint with 70% pass threshold verification.
📝 125 Exam Questions
⏱️ 4 Hours (240 Mins)
🎯 70.0% Pass Standard
📊 MWA Diagnostic Scorecard
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2026 RSOS Blueprint Distribution for Refrigeration & AC Mechanic (313A)
Major Work Activity (MWA)
Target Questions
Exam Weight
MWA A: Performs common occupational skills
13 Qs
10%
MWA B: Performs routine trade activities
19 Qs
15%
MWA C: Plans installation
18 Qs
14%
MWA D: Performs installation
26 Qs
21%
MWA E: Performs commissioning
21 Qs
17%
MWA F: Performs maintenance and service
28 Qs
22%
Total Red Seal Exam Length
125 Questions
100%
Sample Diagnostic Practice Questions
Try these sample questions from our Refrigeration & AC Mechanic (313A) question bank. Select an answer to see instant feedback and explanation.
Q1. At a supermarket distribution centre in Mississauga, a refrigeration mechanic must replace a burnt contactor on a 600 V semi-hermetic compressor on the parallel rack. The mechanic opens the compressor's disconnect, applies a personal lock and tag, and sees the rack controller show the compressor as offline. Before touching the contactor terminals, what must the mechanic do next?
Worked Explanation: A lock on the disconnect does not prove the conductors are dead: the wrong switch may have been opened, or there may be a second feed. The absence of voltage is proven on every phase at the point of work, with a tester checked on a known live source. A test at the disconnect does not reach the contactor, a clamp meter shows current rather than voltage, and a controller status is not a test of the conductors.
Q2. A mechanic in Laval is piping a PVC condensate drain from a ducted fan coil above an office ceiling to a floor drain in a utility room. On the old units in this building, slime blocked the traps, and they had to be cut out to clean them. What should the new drain include to make cleaning easier?
Worked Explanation: A cleanout tee with a plug, or a trap made to be opened, lets the drain and trap be flushed and cleared without cutting the pipe. It is located where it can be reached through the ceiling access. A smaller pipe clogs sooner, a fully glued trap has to be cut again, and no trap lets air through.
Q3. The electronically commutated evaporator fan motors in a walk-in cooler at a Regina restaurant have stopped. One motor does not turn at all, and the others run. The mechanic measures full 120 V at the dead motor's connector, the plug is tight, and the fan blade spins freely by hand with the power off. What is the most likely conclusion?
Worked Explanation: Full voltage at a tight connector with a free-turning blade, while the other motors run on the same circuit, means the motor or its electronics have failed. Most ECM fan motors of this type are replaced as a unit. Other motors run and voltage is full, so the thermostat, the supply and the blade are not the cause.
Frequently Asked Questions — Red Seal Refrigeration & AC Mechanic (313A)
Essential examination guidelines, format specifications, and pass requirements for Canadian Refrigeration & AC Mechanic (313A) candidates.
What is the passing score for the Red Seal Refrigeration & AC Mechanic (313A) exam?
The passing grade across Canada is strictly 70%. On a 125-question examination, you must correctly answer at least 88 questions to earn your Interprovincial Red Seal endorsement.
How many questions are tested and what is the time limit?
The official examination contains 125 multiple-choice questions. Candidates are given 4 hours (240 minutes) to complete the exam, allowing an average of 1.9 minutes per question.
How is this mock exam calibrated to the 2026 RSOS?
Our simulator strictly mirrors the official Canadian Red Seal Occupational Standard (RSOS). Questions are proportional to the actual Major Work Activity (MWA) weighting tested in provincial examination centers, covering trade safety, tools, installations, diagnostics, and code compliance.
What feedback do I receive upon completing the simulator?
You receive an immediate score breakdown by Major Work Activity, highlighting your areas of strength and weakness. The AI Journeyperson Tutor provides detailed procedural and code citations for every question so you understand the technical reasoning behind every correct answer.
Free Study Guide, Formula Reference & 10-Question Readiness Quiz
Want to review Refrigeration & AC Mechanic (313A) formulas and take a free 10-question diagnostic quiz first?
Visit our main Red Seal Refrigeration & AC Mechanic (313A) Practice Test & Study Guide Hub for the free 10-question readiness quiz, 30-question printable PDF, worked math examples, and 2026 RSOS code reference sheet.