Mechanical Components

Question 1

When a cam rotates on drum shoes the rollers move

Answer 1

up the back

Question 2

Flat brake cams are aften used on steer axle foundation brakes because they:

Answer 2

Have a slower rate of application that S cams

Question 3

The foundation brake component that provides a place to adjust the brake lining to drum clearance is the:

Answer 3

Slack adjuster

Question 4

During braking,the brake spider transfers torque from the:

Answer 4

Brake shoes to the axel housing

Question 5

One of the most common causes of brake failure is?

Answer 5

Improper brake adjustment

Question 6

The automatic slack adjuster automatically makes a brake adjustment when:

Answer 6

The brakes are released

Question 7

What is the advantage of having air disc brakes over drum?

Answer 7

Are not as prone to brake fade

Question 8

The caliper of an air disc brake must be able to slide on its mounting pins so that the:

Answer 8

Outboard brake pad contacts the rotor

Question 9

Using brake linning with GAWR that is too low can result in?

Answer 9

Brake fade

Question 10

Brake lining edge code identifies the lining by

Answer 10

The initials of manufacturer, the normal coefficient of friction, the hot coefficient of friction

Question 11

The term brake fade occurs at excessively high brake temperatures because the

Answer 11

Brake lining coeficient of fiction is reduced

Question 12

Cam opperated foundation brakes are called?

Answer 12

Non servo brakes

Question 13

Brake drums thickness affects the drums ability to?

Answer 13

Dissipate heat

Question 14

Brake drums must be able to?

Answer 14

Provide an acceptable braking surface, withstand high temperatures, resist distortion

Question 15

The linear motion of the brake chamber pushrod is converted to twisting force at the brake camshaft by the?

Answer 15

Slack adjuster

Question 15

Brake drums must be able to?

Answer 15

Provide an acceptable braking surfac, withstand high temperatures, resist distortion

Question 15

The term brake fade occurs at excessively high brake temperatures because the

Answer 15

Brake lining coeficient of fiction is reduced

Question 15

The term brake fade occurs at excessively high brake temperatures because the

Answer 15

Brake lining coeficient of fiction is reduced

Question 15

During application, the angle formed between the brake chamber pushrod and slack adjuster arm should never be what angle?

Answer 15

Less than 90 degrees

Question 15

What are two types of air actuated disc brakes?

Answer 15

Power shaft

Cam and lever

Question 15

What are two types of brake rotors?

Answer 15

Splined

Conventional rotor

Question 15

What are the two types of brake shoes?

Answer 15

1. Cast

2. Fabricated