BC Class 3 Practice Test · Question
Which of the following best describes the principle of 'grade choice' when using engine braking on a mountain descent?
The 'grade choice' principle for descending with engine braking means selecting a gear low enough to control your speed without excessive reliance on service br
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Question: Which of the following best describes the principle of 'grade choice' when using engine braking on a mountain descent?
Answer options:
- Selecting the highest gear that allows the truck to accelerate downhill without using service brakes ✅ Using the same gear you would need to climb the exact same hill, ensuring engine RPM is within a safe range
- Shifting into neutral to allow gravity to control descent while keeping engine RPM at idle
- Alternating between high and low gears to cool the engine during descent
Correct answer: Using the same gear you would need to climb the exact same hill, ensuring engine RPM is within a safe range
Explanation: The 'grade choice' principle for descending with engine braking means selecting a gear low enough to control your speed without excessive reliance on service brakes, typically the same gear used to ascend that grade, allowing the engine RPM to stay within a safe operating range.
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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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