Question

What is a gauge???????​

Answer 1

Explanation:

A gauge, in science and engineering, is a device used to make measurements or in order to display certain dimensional information. A wide variety of tools exist which serve such functions, ranging from simple pieces of material against which sizes can be measured to complex pieces of machinery.

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Answer 2

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an instrument that measures and gives a visual display of the amount, level, or contents of something.

"a fuel gauge"