Air Brake Endorsement Quiz

The service brake is applied and released by using the brake pedal during normal driving to control the vehicle's speed and come to a stop.

The parking brake can be manually applied and released using the parking brake control, regardless of whether the engine is running or the car is parked on a flat surface or incline.

The emergency brake system is designed to stop the vehicle in the event of a brake system failure by using parts of the service and parking brake system. It is not used to accelerate the vehicle, improve fuel efficiency, or serve as a backup system for the air conditioning.

In an industrial setting, the governor is responsible for controlling the air compressor to pump air into the storage tanks.

Air storage tanks are specifically designed to hold compressed air, not water or other substances. They are commonly used in various industries for storing compressed air for later use.

When you push down the brake pedal, it activates the brake system which applies air pressure to the brake pads, creating friction to slow down or stop the vehicle.

Slack adjusters are crucial components in the brake system of a vehicle, used for adjusting the brakes to ensure proper stopping power and safety.

To properly check the slack adjuster, it is important to follow the correct procedure of parking on level ground, turning off parking brakes, and pulling hard on each slack adjuster. This method ensures that the slack adjuster is functioning within safety limits.

The correct way to test the low pressure warning signal is to shut off the engine with enough air pressure, turn on the electrical power and step on and off the brake pedal until the low air pressure warning signal comes on.

The maximum allowable leakage rates for vehicle air brake systems are critical for ensuring proper functioning and safety while operating on the road. The correct answer specifies the leakage rates for single and combination vehicles as less than two psi and less than three psi in one minute respectively. The other incorrect options present higher leakage rates which would not be permissible according to safety standards.

Leaving a vehicle unattended without applying parking brakes or chocking the wheels can lead to accidents or the vehicle rolling away. It is important to always secure the vehicle when leaving it unattended.

Using the parking brake is essential regardless of how long you are away from your vehicle to prevent it from rolling away, especially on inclines or declines.

Draining air tanks daily helps prevent moisture buildup and ensures the longevity of the tanks and the equipment they are connected to.

Brakes can fade or fail due to overheating, low air pressure, and not relying on engine braking. Pressing the brake pedal hard enough, not taking foot off the accelerator, or using the handbrake frequently are not primary factors leading to brake fade or failure.

Being in the proper gear before heading downhill helps in maintaining control and reduces the need for heavy braking, preventing brake overheating and potential loss of control.

Oil and water collecting in the air tanks can lead to brake failure due to the contamination of the braking system.

The purpose of an alcohol evaporator is to prevent ice buildup in brake valves and other parts during cold weather, ensuring proper functioning of the vehicle's braking system.

Controlled braking, also known as squeeze braking, refers to gently and progressively applying pressure to the brakes to slow down or stop the vehicle in a controlled manner.

Air tanks need to be drained to prevent moisture and oil buildup which can lead to rust, corrosion, and reduce the effectiveness of the tank.

A supply pressure gauge is specifically designed to display the remaining air pressure inside the tank, helping the user to monitor the air level and plan for refills or replacements accordingly.

All vehicles with air brakes must have a low air pressure warning signal to ensure safety and proper maintenance of the brake system.

Spring brakes are a safety feature in vehicles equipped with air brakes. They are designed to engage automatically if there is a leak in the air brake system to ensure the vehicle can come to a stop safely.

Front wheel brakes are designed to provide efficient braking power under various conditions, making them a reliable choice for most situations.

In vehicles equipped with air brake systems, the brakes are indeed operated using an electric switch and air pressure to activate the brake lights when the brakes are applied.

Air brakes use compressed air to apply the braking force, unlike hydraulic brakes that use hydraulic fluid, electrical brakes that use electricity, or mechanical brakes that rely on springs.

Air brakes on commercial vehicles typically consist of three separate braking systems: the service brake, the parking brake, and the emergency brake. Each of these systems serves a different purpose and operates independently of the others, providing redundancy and increased safety in case of a failure in one system.