Questions and Answers
The maximum traction between a tire and the road occurs when the tire is _______________.
slipping 10 to 20 percent
Antilock brakes cannot defy the laws of physics under what conditions? (Select all that apply)
Tech A says that the ABS may not result in shorter stopping distance compared to brakes without ABS.
True
Tech B says a pulsating brake pedal during normal braking is a characteristic feature of most ABS equipped vehicles.
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What type of antilock brake system requires the use of four wheel speed sensors?
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Tech A says that some ABS use a sensor located in the rear axle pinion gear area.
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Tech B says that all ABS use a wheel speed sensor at each wheel.
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Tech A says that most ABS units are non-integral.
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Tech B says the ABS is disabled below about 5 mph.
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Technician A says that ABS brakes are designed to allow the front wheel to be steered during heavy braking.
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Tech B says that the ABS dash warning light is amber.
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A passive wheel speed sensor is also referred to as?
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An active wheel speed sensor is referred to as?
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Which part of an antilock brake system is used for tire pressure monitoring?
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Study Notes
Tire Traction
- Maximum tire traction occurs when slipping is between 10 to 20 percent.
Antilock Brake Systems (ABS)
- ABS cannot overcome physics in the following situations:
- Entering a corner too fast.
- Brakes applied too late to prevent impact.
- Ineffective in stopping quickly under all conditions.
- ABS may not provide shorter stopping distances compared to traditional brakes.
- Pulsating brake pedal during normal braking is common in ABS-equipped vehicles.
ABS Types and Sensors
- The antilock brake system requiring four wheel speed sensors is a four-channel system.
- Some ABS setups utilize a rear axle pinion gear area sensor, while not all systems have a sensor at each wheel.
Technician Insights on ABS
- Most ABS units are classified as non-integral systems.
- ABS functionality is typically disabled below about 5 mph.
Steering and Indicators
- ABS allows steering control during heavy braking.
- The ABS dashboard warning light is amber in color.
Wheel Speed Sensors
- A passive wheel speed sensor is also known as a variable reluctance sensor.
- Active wheel speed sensors can be classified as either Hall effect or magneto resistive types.
Tire Pressure Monitoring
- Wheel speed sensors play a key role in tire pressure monitoring within an antilock brake system.
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Description
Test your knowledge of vehicle dynamics concepts with this quiz based on Chapter 110. The questions focus on tire traction and the limitations of antilock brakes. Prepare to enhance your understanding of how physics applies to automotive safety and control.
