Which statement best describes the expected relationship between Go and No-Go gauges during headspace testing?

Which statement best describes the expected relationship between Go and No-Go gauges during headspace testing?

• A. The No-Go gauge should produce the same result as the Go gauge.
• B. The Go gauge is irrelevant to the No-Go gauge result.
• C. The No-Go gauge should never be used with headspace testing.
• D. The No-Go gauge should produce a different result than the Go gauge.

Answer: (D)

The gauges bound how much headspace is acceptable. The Go gauge represents the minimum headspace that the chamber should have, so it should fit. The No-Go gauge represents the maximum headspace allowed, so it should not fit if the chamber is within spec. Because these gauges test opposite ends of the tolerance, a properly sized chamber will show different results: the Go gauge fits, while the No-Go gauge does not. If both gauges fit or both fail, the headspace is out of spec. This is why the No-Go gauge should produce a different result than the Go gauge.

The gauges bound how much headspace is acceptable. The Go gauge represents the minimum headspace that the chamber should have, so it should fit. The No-Go gauge represents the maximum headspace allowed, so it should not fit if the chamber is within spec. Because these gauges test opposite ends of the tolerance, a properly sized chamber will show different results: the Go gauge fits, while the No-Go gauge does not. If both gauges fit or both fail, the headspace is out of spec. This is why the No-Go gauge should produce a different result than the Go gauge.