brake adjuster Interview Questions and Answers

1. What is a brake adjuster?

   • Answer: A brake adjuster is a mechanical device used to maintain the correct clearance between brake shoes or pads and the drum or rotor, ensuring effective braking performance.

2. What are the different types of brake adjusters?

   • Answer: Common types include manual adjusters (requiring hand-adjustment), self-adjusting systems (automatically adjust during braking), and automatic adjusters (using various mechanisms for automatic adjustment).

3. How does a manual brake adjuster work?

   • Answer: A manual adjuster typically involves a threaded mechanism that moves the brake shoes or pads closer to the drum or rotor. The adjuster is turned using a wrench or other tool.

4. Explain the function of a self-adjusting brake system.

   • Answer: Self-adjusting systems utilize the force of braking to automatically adjust the brake shoe or pad position. As the brakes are applied, a mechanism moves the adjuster to compensate for wear.

5. What are the signs of a brake adjuster needing adjustment?

   • Answer: Signs include a spongy brake pedal, increased pedal travel, brake drag (wheels sticking), uneven braking, squealing or grinding noises, and a noticeable increase in stopping distance.

6. What tools are typically needed to adjust brakes?

   • Answer: Tools vary depending on the type of adjuster, but may include wrenches (sockets, open-end, adjustable), screwdrivers, pliers, and possibly specialized brake adjustment tools.

7. Describe the safety precautions when adjusting brakes.

   • Answer: Always use wheel chocks to prevent the vehicle from rolling. Wear safety glasses to protect against flying debris. Ensure the vehicle is parked on a level surface. Disconnect the battery's negative terminal before working on the brake system.

8. How do you check for brake drum or rotor wear?

   • Answer: Measure the thickness of the drum or rotor with a caliper or micrometer, comparing the measurement to the manufacturer's specifications. Look for scoring, cracks, or excessive wear.

9. What is the importance of proper brake adjustment?

   • Answer: Proper adjustment ensures efficient braking, reduces stopping distance, prevents brake drag, extends the life of brake components, and improves overall vehicle safety.

10. What are the common causes of brake squeal?

    • Answer: Brake squeal can be caused by worn brake pads, improper adjustment, contaminated brake surfaces, or worn or damaged brake components.

11. How do you troubleshoot a brake system with a spongy pedal?

    • Answer: Check for air in the brake lines (bleeding may be necessary), low brake fluid, worn brake components, or a master cylinder issue.

12. What is the difference between leading and trailing brake shoes?

    • Answer: Leading shoes are the brake shoes that initially contact the drum when the brakes are applied, while trailing shoes contact the drum later in the braking process.

13. Explain the concept of brake fade.

    • Answer: Brake fade is the reduction in braking effectiveness caused by overheating of the brake components. This often occurs during prolonged or heavy braking.

14. What is the purpose of brake return springs?

    • Answer: Brake return springs pull the brake shoes or pads away from the drum or rotor after braking, allowing the wheels to rotate freely.

15. How often should brakes be inspected?

    • Answer: Brakes should be inspected regularly, at least once a year or as recommended by the vehicle manufacturer. More frequent inspection is warranted if unusual noises or braking behavior is noted.

16. Question 16: [Insert Question Here]

    • Answer: [Insert Detailed Answer Here]

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