Vehicle Braking Systems and Safety Techniques
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Questions and Answers

The brake pedal is part of which braking system?

  • Service (correct)
  • Emergency
  • Parking
  • None of the above
  • To prevent your tires and engine from overheating while you are driving in especially hot weather, you should:

    Decrease your speed.

    If a vehicle gets stuck on a railroad track, the driver should:

    Get out of the vehicle and walk away from the tracks.

    Sometimes, when checking the automatic transmission fluid level:

    <p>Your vehicle may have to be left running.</p> Signup and view all the answers

    The most common type of foundation brake used is the:

    <p>S-cam drum brake.</p> Signup and view all the answers

    What is reaction distance?

    <p>The distance traveled between seeing a hazard and physically hitting the brakes.</p> Signup and view all the answers

    During a basic vehicle control skills test, you may be asked to:

    <p>Alley dock.</p> Signup and view all the answers

    What is the average driver's reaction time?

    <p>Between three-quarters of a second and one second.</p> Signup and view all the answers

    Off-ramps are safe for trucks.

    <p>False</p> Signup and view all the answers

    An example of mandatory emergency equipment is:

    <p>A supply of spare electrical fuses.</p> Signup and view all the answers

    To confirm that a trailer has ABS, you can:

    <p>Look under the trailer for wheel speed sensors coming from the back of the brakes.</p> Signup and view all the answers

    If you have more than one license, you will be fined:

    <p>Up to $5,000.</p> Signup and view all the answers

    During a pre-trip inspection, belts in the engine compartment should be:

    <p>Checked for tightness.</p> Signup and view all the answers

    Front wheel braking works under all conditions.

    <p>True</p> Signup and view all the answers

    A low air pressure warning signal should activate:

    <p>When tank pressure falls below 55 psi.</p> Signup and view all the answers

    What happens to a driver who is convicted of two serious traffic violations within a three-year period?

    <p>They will lose their CDL for at least 60 days.</p> Signup and view all the answers

    When inspecting engine compartment belts during the vehicle inspection test:

    <p>The applicant must identify which items are not belt-driven, if any.</p> Signup and view all the answers

    To inspect slack adjusters on S-cam brakes, you need to:

    <p>Chock the wheels and disengage the parking brake.</p> Signup and view all the answers

    Rims with welding repairs are safe.

    <p>False</p> Signup and view all the answers

    When operating a vehicle with a dual brake system, a driver should:

    <p>Wait to begin driving until the air compressor builds up a minimum pressure of 100 psi in both the primary and secondary systems.</p> Signup and view all the answers

    Dollies equipped with ABS are required to have malfunction lamps located where?

    <p>On the left side.</p> Signup and view all the answers

    A one-way check valve:

    <p>Prevents air from escaping if the air compressor has a leak.</p> Signup and view all the answers

    During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.

    <p>2 psi</p> Signup and view all the answers

    Anti-Lock Braking Systems (ABS) reduce normal braking power.

    <p>False</p> Signup and view all the answers

    In cold weather, an alcohol evaporator should be checked and filled:

    <p>Every day.</p> Signup and view all the answers

    In a dual air brake system:

    <p>Each system has separate air tanks, hoses, and lines.</p> Signup and view all the answers

    If the spring brakes are activated, you should push down the brake pedal.

    <p>False</p> Signup and view all the answers

    In a vehicle with dual parking control valves, once air pressure is lost and the spring brakes come on:

    <p>A separate air tank can be used to release the spring brakes for a short period of time.</p> Signup and view all the answers

    During a static leakage test, the maximum leakage rate for a double combination vehicle is ____ in one minute.

    <p>3 psi</p> Signup and view all the answers

    Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.

    <p>100 psi</p> Signup and view all the answers

    To inspect slack adjusters on S-cam brakes, you need to:

    <p>Chock the wheels and disengage the parking brake.</p> Signup and view all the answers

    A tank endorsement is:

    <p>Used when transporting both liquids and gases.</p> Signup and view all the answers

    Which of the following is not a part of an air brake system?

    <p>An axle brake system.</p> Signup and view all the answers

    During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.

    <p>6 psi</p> Signup and view all the answers

    Study Notes

    Braking Systems

    • The brake pedal is a component of the service braking system.
    • The most common foundation brake type is the S-cam drum brake.
    • Front wheel braking functions effectively under all conditions.
    • Anti-Lock Braking Systems (ABS) enhance safety but do not diminish standard braking power.

    Driving Techniques

    • To avoid overheating in hot weather, decrease speed.
    • In case of a vehicle stuck on railroad tracks, exit the vehicle and move away from the tracks.
    • During vehicle operation with a dual brake system, wait for the air compressor to reach a minimum of 100 psi before driving.

    Vehicle Inspection

    • Check belts in the engine compartment for tightness during pre-trip inspections.
    • For automatic transmission fluid level checks, the vehicle may need to be running.
    • Inspect slack adjusters on S-cam brakes by chocking the wheels and releasing the parking brake.
    • Rims with welding repairs are deemed unsafe.

    Reaction and Distance

    • Reaction distance is the space traveled from spotting a hazard to applying brakes; average driver's reaction time ranges from three-quarters of a second to one second.

    Air Brake Systems

    • Dual air brake systems feature separate air tanks, hoses, and lines.
    • A one-way check valve is crucial for maintaining air pressure in the event of a compressor leak.
    • The low air pressure warning signals activation occurs below 55 psi.
    • Maximum leakage rates for air brake tests: 2 psi for single vehicles, 3 psi for double combinations, and 6 psi for triple combinations.

    Safety and Equipment

    • Mandatory emergency equipment includes spare electrical fuses.
    • Dollies with ABS should have malfunction lamps located on the left side.
    • In cold conditions, the alcohol evaporator must be checked and filled daily.
    • A driver with multiple licenses may incur a fine of up to $5,000.
    • Conviction for two serious traffic violations within three years results in a CDL suspension for at least 60 days.

    Parking and Controls

    • The spring brakes should never be pressed down when activated.
    • Dual parking control valves allow a separate air tank to momentarily release spring brakes after pressure loss.

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    Description

    This quiz covers essential knowledge about braking systems, driving techniques, and vehicle inspection procedures. Test your understanding of vehicle safety and maintenance practices with questions on anti-lock braking systems, pre-trip inspections, and safe driving strategies. Perfect for drivers and automotive enthusiasts looking to enhance their skills.

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