During a walk-around inspection, ensure there are no cracks on the brake drums that are more than __ of the width of the friction area.
Answers
One half
One quarter
One third
One tenth
The Correct Answer and Explanation is :
The correct answer is One half.
When performing a walk-around inspection on a vehicle’s braking system, it is crucial to check the brake drums for cracks, as these can severely impact the safety and performance of the brakes. Cracks in brake drums can develop over time due to the high heat and stress they endure during braking. If cracks are present, they can grow and cause the brake drum to fail, which can result in a loss of braking power or even complete brake failure.
According to industry standards, a brake drum with cracks that extend more than one-half of the width of the friction area is considered dangerous and should be replaced. This is because cracks of this size can significantly weaken the structural integrity of the brake drum, making it prone to breaking under the pressure of braking forces. Brake drums are designed to absorb the heat generated by friction between the brake pads and the drum surface. However, when cracks form and compromise the drum, its ability to dissipate heat effectively is reduced, leading to potential overheating and further damage.
The friction area refers to the part of the drum that makes contact with the brake shoes or pads. If the crack is too large, it can disrupt the even distribution of pressure across the brake system, leading to uneven braking or loss of braking performance. Additionally, a cracked brake drum can result in vibrations, noise, and increased wear on other components of the braking system.
In summary, during an inspection, if any crack on the brake drum exceeds half of the width of the friction area, it is a red flag that indicates the drum is unsafe to use. The brake drum should be replaced immediately to ensure the safety and effectiveness of the vehicle’s braking system.