Answer :
Final answer:
Dial indicators, often used in mechanical engineering, usually have either one or two indicator needles. They measure small linear distances with high accuracy, with the number of needles relating to the complexity of the measurement.
Explanation:
Dial indicators, which belong to the field of mechanical engineering, are typically equipped with either one or two indicator needles. A dial indicator is a measurement tool used to measure small linear distances with high accuracy. The main feature of a dial indicator is its needle or pointer, which moves around a dial to indicate measurement readings. The number of needles often correlates with the complexity of the measurement. For basic measurements, like length or diameter, a single needle is usually used. However, for more complex measurements requiring two reference points, dial indicators may have two needles.
Learn more about Dial Indicators here:
https://brainly.com/question/33601944
#SPJ1
