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Truck & Transport Mechanic (310T)

Maintain and repair commercial trucks, buses, and trailer brake, steering, and drivetrain systems.

Full exam prep for this trade is coming soon. Sign up to get notified when practice questions and mock exams are available.

A Red Seal endorsement is a seal on your provincial or territorial trade certificate. It shows you have the knowledge and skills to practice your trade across Canada — earned by passing the interprovincial Red Seal exam.

What this trade covers

Maintain and repair commercial trucks, buses, and trailer brake, steering, and drivetrain systems.

Exam format

  • 120 multiple-choice questions
  • 4-hour time limit
  • 70% required to pass
  • Closed-book
  • 135 questions, 4 hours, 70% to pass
  • Questions align with the Red Seal Occupational Standard (RSOS)

Exam blueprint (RSOS)

Questions are distributed across major work activities defined in the Red Seal Occupational Standard — the same breakdown used on the official exam.

Block A

Common Occupational Skills

8 Qs · 6%
Block B

Services, diagnoses and repairs engines and supporting systems

21 Qs · 16%
Block C

Services, diagnoses and repairs air systems and brake systems

17 Qs · 13%
Block D

Services, diagnoses and repairs electrical and electronic systems

22 Qs · 16%
Block E

Services, diagnoses and repairs drive trains

17 Qs · 13%
Block F

Services, diagnoses and repairs steering, chassis/frames, suspensions, tires, wheels and hubs

18 Qs · 13%
Block G

Services, diagnoses and repairs cabs

5 Qs · 4%
Block H

Services, diagnoses and repairs trailers

8 Qs · 6%
Block I

Services, diagnoses and repairs climate control systems

7 Qs · 5%
Block J

Services, diagnoses and repairs hydraulic systems

8 Qs · 6%
Block K

Services, diagnoses and repairs hybrid and electric vehicles (EV)

4 Qs · 3%

Official Red Seal resources

Source material from the Red Seal Program — administered by the Canadian Council of Directors of Apprenticeship (CCDA).

Ready to prepare for your 310T exam?

Practice by RSOS block, run timed mock exams, and track readiness — aligned with the official 120-question blueprint.