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100+ Free Red Seal 310T Practice Questions

Red Seal Truck and Transport Mechanic (310T) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Red Seal 310T Exam

100

Practice Questions

OpenExamPrep

70%

Passing Score

Red Seal Program

~24%

Air Brakes/Steering/Suspension Weight

Red Seal Occupational Standard

310T

Ontario Trade Code

Red Seal Program

13

Provinces/Territories Recognizing Red Seal

Red Seal Program

~$100-170

Provincial Exam Fee (CAD)

Provincial apprenticeship authorities

The Red Seal Truck and Transport Mechanic (310T), also known as Truck and Transport Technician, is the interprovincial standard for technicians who service, diagnose, and repair heavy commercial trucks, trailers, and buses. The Red Seal interprovincial (IP) exam is multiple-choice (commonly cited around 100-150 questions) with a 70% passing score, and provincial fees typically run about $100-170 CAD. The exam weights air brakes, steering and suspension most heavily (~24%), followed by diesel engines, fuel and emissions (~20%) and electrical/electronic systems (~18%), with drivetrains, HVAC/hydraulics/diagnostics, and common occupational skills making up the rest. Earning the Red Seal endorsement gives interprovincial mobility across all of Canada. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample Red Seal 310T Practice Questions

Try these sample questions to test your Red Seal 310T exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Before working under a heavy truck raised on a hoist, what is the most important step a technician must take to prevent a crushing injury?
A.Apply the parking brakes only
B.Engage the hoist safety locks or position safety stands
C.Chock one rear wheel
D.Leave the transmission in gear
Explanation: A hydraulic or air hoist can settle or fail, so its mechanical safety locks must be engaged (or rated safety stands positioned) before anyone works underneath. This provides a positive mechanical support independent of system pressure.
2A WHMIS 2015 Safety Data Sheet (SDS) is divided into how many standardized sections?
A.8
B.12
C.16
D.20
Explanation: Under WHMIS 2015 (aligned with GHS), every Safety Data Sheet follows a standardized 16-section format covering identification, hazards, composition, first aid, handling, and more. This consistent layout lets a technician quickly locate hazard and first-aid information.
3When using a sling to lift a heavy component, the rated working load of the sling decreases as the angle between the sling legs and the horizontal becomes:
A.Smaller (closer to horizontal)
B.Larger (closer to vertical)
C.Exactly 90 degrees
D.Unaffected by angle
Explanation: As the sling angle to the horizontal decreases, the tension in each leg increases sharply, reducing the safe working load. A near-horizontal sling can carry only a fraction of its vertical rating, so technicians keep angles steeper than about 45 degrees.
4Which class of fire extinguisher is appropriate for a fire involving energized electrical equipment such as a truck's battery or wiring?
A.Class A
B.Class B
C.Class C
D.Class D
Explanation: Class C extinguishers are rated for fires involving energized electrical equipment and use a non-conductive agent so the operator is not exposed to electric shock. Many shop extinguishers are multi-rated ABC for this reason.
5A torque wrench should be stored at the end of the day set to:
A.Its maximum setting
B.Its lowest setting on the scale
C.The most commonly used value
D.Any value, storage setting does not matter
Explanation: A click-type torque wrench should be backed off to its lowest scale setting (not zero) for storage to relieve tension on the internal spring and preserve calibration accuracy. Leaving it set high keeps the spring loaded and causes drift over time.
6Lockout/tagout procedures on a heavy vehicle are primarily used to:
A.Prevent theft of tools
B.Isolate and control hazardous energy during service
C.Speed up the repair process
D.Record billable labour hours
Explanation: Lockout/tagout isolates and locks out hazardous energy sources, electrical, air, hydraulic, and stored mechanical energy, so equipment cannot start or release energy unexpectedly during service. Each worker applies a personal lock to ensure no one re-energizes the system.
7On a hydraulic schematic, a circle with a solid triangle pointing inward at the shaft symbol typically represents which component?
A.A pump
B.A motor
C.A relief valve
D.An accumulator
Explanation: In ISO hydraulic symbols, a circle with the energy-flow triangle pointing inward (toward the centre) represents a motor, which converts fluid energy into rotation. A pump uses the same circle but with the triangle pointing outward.
8What is the primary hazard a technician must guard against when servicing a multi-piece (split-rim) truck wheel assembly?
A.Coolant burns
B.Explosive separation of the lock ring during inflation
C.Refrigerant exposure
D.Battery acid splash
Explanation: Multi-piece rims can violently eject the lock ring or side ring if the tire is inflated while the components are not properly seated, causing serious injury or death. Technicians must use a safety cage and an inflation cage chuck with the operator standing clear.
9Which document gives a heavy-duty technician the manufacturer's specified torque sequence and values for cylinder head bolts?
A.The bill of lading
B.The OEM service manual
C.The WHMIS label
D.The vehicle registration
Explanation: The OEM service manual contains the manufacturer's torque values, tightening sequences, and torque-to-yield procedures required for safe and accurate assembly. Following these exactly prevents head-gasket failure and warpage.
10A technician welding near a vehicle's electronic control modules should first:
A.Disconnect the battery ground and protect or unplug nearby modules
B.Increase the welder amperage
C.Leave the ignition switched on
D.Connect the welding ground far from the work area
Explanation: Welding current and voltage spikes can destroy sensitive electronic control modules, so the battery ground should be disconnected and the welder ground clamp placed as close to the weld as possible. Some OEMs also require unplugging the affected modules.

About the Red Seal 310T Practice Questions

Verified exam format metadata for Red Seal Truck and Transport Mechanic (310T) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.