Ontario Class A Practice Test · Question
How can a driver proactively prevent a jackknife situation caused by locking the drive wheels?
To prevent drive wheel lock-up leading to a jackknife, drivers should apply steady, moderate brake pressure to avoid skidding and downshift to use engine brakin
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Question: How can a driver proactively prevent a jackknife situation caused by locking the drive wheels?
Answer options:
- By applying more power to the drive wheels.
- By ensuring the trailer brakes are set harder than the tractor brakes. ✅ By applying steady, moderate brake pressure and downshifting before slippery sections.
- By only using the hand-lever (spike) brake.
Correct answer: By applying steady, moderate brake pressure and downshifting before slippery sections.
Explanation: To prevent drive wheel lock-up leading to a jackknife, drivers should apply steady, moderate brake pressure to avoid skidding and downshift to use engine braking, especially before entering slippery road sections. This maintains traction and control.
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- Approaching a sign that reads 'Runaway Lane / Emergency Escape Ramp Ahead', what is the immediate significance
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