Answer :
Final answer:
The best tool to check the thickness of a brake disc is a micrometer, which measures small distances accurately. Other options like the dial indicator, torque wrench, and tape measure are not suitable for this specific task. A micrometer ensures precise measurements critical for brake performance and safety.
Explanation:
Measuring the Thickness of a Brake Disc
To check the thickness of a brake disc, the most suitable tool from the options provided is the micrometer. A micrometer is a precision measuring instrument that can measure small distances with great accuracy, typically within 1 micron (µm). This is crucial for components like brake discs, as even slight variations in thickness can affect braking performance and safety.
The other tools listed have different functions:
- Dial Indicator: Generally used to measure small distances or variations in flatness and is not used for direct thickness measurements.
- Torque Wrench: Designed for applying a specific torque to fasteners and is not a measuring tool for thickness.
- Tape Measure: Though useful for measuring longer distances, it lacks the precision needed for measuring the thickness of brake discs.
In conclusion, when accuracy is required for measuring the thickness of components like brake discs, a micrometer is the best choice.
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