Step 3 » GENERAL learning environment Category B (B, B1)

For answer  A 

If the brake pedal remained stuck, the shoes would press constantly against the drums, keeping the brakes engaged. This could lead to the wheels locking or to difficult rotation, causing the brakes to overheat.

For answer  B 

If the play between the shoes and the drums is insufficient, or much smaller than normal, the shoes need a very short distance to travel until they press on the drums when the brake pedal is operated. Therefore, the free travel of the pedal will be shorter than normal, signalling insufficient play between the shoes and the drums. In a disc braking system, the same issue appears when the brake pads have too little play relative to the discs.

For answer  C 

In the case of a brake fluid leak, the remaining volume in the system would be smaller, which would allow a longer pedal travel. Thus, the brake pedal would have to be pressed more than usual to obtain the same braking effect.

The correct answer is: B

Recommendations:

Mechanics course (knowledge of the main elements) --> Mechanics course