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Difficulty: MediumStopping Distance Components

In a commercial vehicle equipped with hydraulic brakes, total stopping distance consists of four distinct components: perception distance, reaction distance, brake lag distance, and effective braking distance.

Answer: Answer

Answer

False
Hydraulic brake systems do not have brake lag because hydraulic fluid transmits pressure almost instantaneously, meaning total stopping distance comprises only three components: perception distance, reaction distance, and braking distance.

Step-by-Step Solution

1
Identify the brake system type specified in the statement.
The statement specifies a commercial vehicle equipped with hydraulic brakes.
Different braking systems (hydraulic versus pneumatic) possess distinct physical operating characteristics and transmission delays.
2
Determine the components that comprise total stopping distance for hydraulic brakes.
Total stopping distance for hydraulic brakes is calculated as Perception Distance + Reaction Distance + Braking Distance (three components).
Hydraulic fluid transmits pressure without the mechanical air-delivery delay found in pneumatic systems, eliminating brake lag distance.
3
Compare the actual formula with the assertion made in the statement.
The statement incorrectly claims that hydraulic brake systems include four components, falsely incorporating brake lag distance.
Brake lag distance (approximately half a second for air to travel through lines and activate chambers) applies strictly to air brake systems.

Key Concept

Hydraulic versus Air Brake Stopping Distance Components
Estimated Time:45s
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Topics

Stopping Distance Components

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