Answer :

Final answer:

A caliper should be used to check sheave groove wear due to its ability to accurately measure the dimensions of the grooves, identifying wear or deformities. Thus the correct option is option C) Caliper.

Explanation:

A caliper should be used to check for sheave groove wear. This tool is ideal for measuring the wear because it can accurately measure the dimensions of the sheave grooves to identify any significant wear or deformities. Unlike other tools listed, a caliper provides the precision needed for such measurements. Dial indicators, thermometers, and tachometers serve different purposes and do not offer the specific measurement capabilities required for assessing sheave groove integrity effectively. A dial indicator is generally used for measuring small distances or angles, a thermometer measures temperature, and a tachometer measures the rotation speed of a shaft or disk.

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