Automotive Service Excellence (ASE) Brakes Certification Practice Exam

Question: 1 / 400

Which tool is commonly used to measure the thickness of brake rotors?

Phillips screwdriver

A micrometer or a brake rotor gauge

A micrometer or a brake rotor gauge is specifically designed for precise measurements of small dimensions, making it ideal for measuring the thickness of brake rotors. Brake rotors must meet specific thickness specifications to ensure safe and effective braking performance. The micrometer or brake rotor gauge allows a technician to accurately assess whether the rotors are within acceptable limits or if they need resurfacing or replacement.

Although a caliper gauge can also be used to measure rotor thickness and is a common tool for various measurements, it is not as specialized as a micrometer or brake rotor gauge. The latter tools provide greater precision, which is crucial in maintaining vehicle safety and performance. The other options, such as a Phillips screwdriver or a laser measure, do not serve the purpose of effectively measuring rotor thickness, highlighting the importance of using the correct tool for this specific task.

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A laser measure

A caliper gauge

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