Automotive - Brakes

Question 1

What two ways can you adjust brake shoes?

Answer 1

Using a star wheel adjuster, or screw adjustment at the wheel cylinder

Question 2

What is the purpose of the small holes in the piston head?

Answer 2

Allows fluid to pass through the piston head during the recuperating stroke

Question 3

What is the purpose of the brake booster?

Answer 3

The brake booster assists the driver to apply the brakes, and so reduces the effort needed on the brake pedal.

Question 4

If free travel was insufficient, what would happen?

Answer 4

If free travel is insufficient, pressure will build up in the system, and cause the brake to be slightly applied

Question 5

What are the 5 requirements of brake fluid?

Answer 5

Viscosity, boiling point, rubber swell, prevention of corrosion, compatability

Question 6

What is the purpose of a pressure differential valve and switch?

Answer 6

To alert the driver to a loss of pressure in the brake system.

Question 7

What fault is likely to cause brake pedal creep?

Answer 7

The double lipped seal on the master cylinder secondary piston, allowing fluid to byass from one circuit to another.

Question 8

What is the meaning of Ovality?

Answer 8

Ovality or non-circularity is the degree of deviation from perfect circularity of the cross section.