Podcast
Questions and Answers
What system controls the front brakes?
What does the primary tank supply air to?
The rear brakes and the park/emergency brakes
What is another name for the supply tank?
Wet tank
What is the function of the air compressor?
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What is the role of the brake valve?
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What does the ABS modulator valve do?
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The safety valve opens if the system reaches 200 psi.
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What is the purpose of the air dryer?
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What is the function of the quick release valve?
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When is the service brake chamber used?
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What is the MV3 valve used for?
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What mechanism does the spring brake use to apply the brakes?
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What does the tractor protection valve protect against?
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What is the purpose of the double check valve?
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What does the low pressure indicator do?
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What does the governor control?
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What is the primary benefit of using a relay valve?
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What system does the secondary tank supply air to?
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The one way check valve allows air to flow in both directions.
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Study Notes
Air Brake Components and Functions
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Secondary System: Controls the front brakes.
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Primary Tank: Supplies air to the rear brakes and operates the parking/emergency brake.
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Wet / Supply Tank: First tank for compressed air, collects moisture and oil, hence the term "wet" tank.
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Air Compressor: Generates compressed air for the brake system, powered by the engine; it increases pressure for stored energy.
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Brake Valve (Foot/Treadle Valve): Central control point that supplies the appropriate air pressure to valves and brake chambers for the secondary brake system.
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ABS Modulator Valve: Regulates air pressure to ABS-controlled brakes; modulates air during ABS operation to prevent wheel lockup.
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Safety Valve: Activates when system pressure exceeds 150 psi to protect from over-pressurization.
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Air Dryer: Removes moisture, cleans, and cools the compressed air to prevent damage to components.
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Quick Release Valve: Enhances the speed of air release from brake chambers for quicker brake release.
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Service Brake Chamber: Engages service brake air for axle operation or parking.
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MV3 Valve: Dash-mounted push-pull valve managing functions such as parking, trailer protection, and air reservoir connections.
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Spring Brake: Utilizes a large coil spring to apply brakes, provides holding force without air application.
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Tractor Protection Valve: Safeguards the tractor by managing air loss in the trailer, ensures operational signals are maintained.
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Double Check Valve: Directs air flow into a common line from two sources, selecting whichever has higher pressure.
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Air Gauge Low Pressure Switch: Safety indicator warns the driver of unsafe low air pressure, often activates a buzzer or warning light.
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Governor: Regulates compressor output by monitoring supply reservoir pressure, controlling compressor activation.
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Relay Valve: Delivers high capacity air directly to brakes, reducing travel time from brake valve to brake assembly.
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One Way Check Valve: Allows airflow in one direction only, preventing backflow.
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Description
This quiz covers key concepts related to air brake systems, including various components such as the secondary system, primary tank, and wet/supply tank. Test your knowledge of how these systems function and their roles in vehicle braking. Perfect for studying air brake schematics and their applications.
