CDL Practice Test (General Knowledge)
Vehicle Safety and Regulations
1. Mud Flaps: - Must reach within 8 inches of the roadway on trucks and trailers.
2. Planning Ahead: - In town, a 12-15 second planning distance is approximately one city block.
3. Bridge Formula: - Restricts axle weight f...
- Must reach within 8 inches of the roadway on trucks and trailers.
2. Planning Ahead:
- In town, a 12-15 second planning distance is approximately one city block.
3. Bridge Formula:
- Restricts axle weight for axles that are closer together.
4. Oil Pressure:
- Should rise to a normal level within seconds after starting the engine.
5. Starting on Hills:
- Best method is to partly engage the clutch before removing your right foot from the brake.
Driving Techniques and Emergencies
1. Highway Awareness:
- At highway speeds, you should monitor traffic 12-15 seconds ahead, which translates to about a
quarter of a mile.
2. Brake Difficulties:
- If descending a long downgrade and experiencing brake issues, utilize an escape ramp, a turn going
uphill, or an open field.
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