Ontario Class A Practice Test · Question
What is the most effective way to prevent a jackknife when braking on a slippery surface?
The most effective way to prevent a jackknife on slippery surfaces is to avoid sudden and aggressive braking. Instead, reduce speed gradually, anticipate stops,
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Question: What is the most effective way to prevent a jackknife when braking on a slippery surface?
Answer options:
- Apply the service brakes firmly and continuously until the vehicle stops. ✅ Avoid sudden or aggressive braking, and downshift to use engine braking.
- Rely primarily on the bobtail (tractor only) brakes.
- Increase speed slightly to maintain momentum and control.
Correct answer: Avoid sudden or aggressive braking, and downshift to use engine braking.
Explanation: The most effective way to prevent a jackknife on slippery surfaces is to avoid sudden and aggressive braking. Instead, reduce speed gradually, anticipate stops, and utilize engine braking combined with light, controlled service brake applications to maintain traction.
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- Approaching a sign that reads 'Runaway Lane / Emergency Escape Ramp Ahead', what is the immediate significance
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