Ontario Class D Practice Test · Question
A truck's 'fifth wheel' is:
The fifth wheel is the heavy coupling device that connects a tractor unit to a semi-trailer's kingpin.
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Question: A truck's 'fifth wheel' is:
Answer options:
- A spare tire ✅ The coupling that connects a tractor to a semi-trailer
- Steering wheel
- Cab heater
Correct answer: The coupling that connects a tractor to a semi-trailer
Explanation: The fifth wheel is the heavy coupling device that connects a tractor unit to a semi-trailer's kingpin.
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- Scenario 1: Tare weight refers to:
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- Scenario 4: An e-log (ELD) records:
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Question explanations
- When performing a pre-trip inspection, what is the minimum air pressure required in an air brake system before
- When driving a straight truck, how should you pass a pedestrian walking on the shoulder of the road without a
- Scenario 1: Tare weight refers to:
- Scenario 2: Gross combination weight (GCW) is:
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