Answer :
Final answer:
The correct measuring tool used to measure the free movement distance of a part is the Dial indicator, which is suitable for high precision measurements in engineering. So the correct option is b.
Explanation:
The measuring tool used to measure the distance in which a part can move freely is a Dial indicator. A dial indicator is a precision instrument that measures small distances or displacements with a level of accuracy that is not achievable with tools like rulers or vernier calipers. The dial indicator can provide a direct reading of small linear distances, making it ideal for checking the variation in tolerance during the inspection process of machined parts.
It is commonly used in engineering to measure the 'play' or 'gap' in parts which require precise assembly. Therefore, the provide correct option in final answer for the measuring tool used to measure the distance in which a part can move freely is (b) Dial indicator.
