“Measure twice, cut once,” is a phrase that is often heard in the working world. This phrase simply means that if the measurement is not correct, the cut will not matter. To minimize the chance of a “bad cut”, the development of precision measuring instruments came about. These tools provide a very precise measurement to allow a reading in the thousandths of an inch or millimeter. Precision measuring tools can be used for detailed measurements of inside diameter, outside diameter, roundness, surface finish, lengths, and depths.
"State the purpose of precision measuring tools
Explain the difference between direct and indirect measurements.
Define accuracy and error.
List the different categories of precision tools."
You will not be required to pass the knowledge check questions to move on to the next lesson. These will not be counted as a grade, but each question gives you insight into what you should have learned and the sorts of things you'll need to remember moving forward.
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