B - Air Brake System Mechanical Components Flashcards
Properly adjusted cam-operated foundation brakes:
Keep the brake linings as close to the brake drum as possible without dragging when the brakes are released.
When a cam-operated foundation brake is in the released position, the brake shoe rollers are:
In contact with the low cam area.
The linear motion of the brake chamber pushrod is converted to twisting force at the brake camshaft by the:
Slack adjuster.
Brake drums must be able to:
Provide an acceptable braking surface, withstand high temperatures, and resist distortion.
Brake drum thickness:
Affects the drum’s ability to dissipate.
Cam-operated foundation brakes are called:
Non-servo brakes.
The term brake fade occurs at excessively high brake temperatures because the:
Brake lining coefficient of friction is reduced.
Brake lining edge code identifies the lining by:
The initials of the manufacturer, the normal coefficient of friction, and hot coefficient of friction.
Using brake lining with a GAWR that is to low can result in:
Brake fade.
During braking, the brake spider transfers torque from the:
Brake shoes to the axle housing.
Flat brake cams are often used in steer axle foundation brakes because they:
Have a slower rate of application that S-cams.
The foundation brake component that provides a place to adjust brake lining to drum clearance is the:
Slack adjuster.
During application, the angle formed between the brake chamber pushrod and the slack adjuster arm should NEVER be:
Less than 90 degrees.
One of the most frequent causes of brake failure is:
Improper brake adjustment.
The automatic slack adjuster automatically makes a brake adjustment when:
The brakes are released.
