Which gauge is utilized to inspect the drilled hole?

The Go/NoGo gauge is specifically designed for the purpose of inspecting drilled holes to ensure that they meet specific size and tolerance requirements. This type of gauge consists of two parts: the "Go" side, which fits into the hole if the size is within acceptable tolerances, and the "NoGo" side, which will not fit if the hole is oversized. Using this method provides a straightforward way to determine whether the hole meets engineering specifications without needing to measure it precisely.

In contrast, calipers and depth gauges offer more precision for measuring dimensions but do not provide a pass/fail assessment like the Go/NoGo gauge does. A ruler is typically used for length measurements and may not be suitable for accurately inspecting holes, particularly when it comes to assessing whether they are within specific tolerances. Thus, the Go/NoGo gauge is the most appropriate choice for this specific inspection task.