Answer :
Final answer:
To determine dial indicator bar sag, precision equipment such as a specialized sag-o-meter or a third dial indicator, along with proper setup and calibration, is typically used. An anti-gravity chamber is fictionally-related and not applicable, while a piece of pipe lacks the necessary precision for such a measurement.
Explanation:
To determine dial indicator bar sag, one typically uses precision instruments and methods tailored for measuring minute deflections or displacements that might occur due to gravitational forces on the measurement setup. The options provided tend to relate to varied contexts:
- A sag-o-meter is a conceptual or specialized device that might be used to measure the sag of a dial indicator bar directly.
- An anti-gravity chamber is a fictional or highly specialized facility that is not commonly used for dial indicator bar sag measurements in conventional engineering practices.
- A piece of pipe is not a precision instrument and would likely be insufficient to accurately measure bar sag.
- A third dial indicator could potentially be used to measure the sag if set up properly in a calibration procedure where it monitors the deflection of the bar being analyzed.
Typically, in engineering practices, a carefully set up jig or a precision flat surface with a reference dial indicator can be used along with mathematical calculations to determine the deflection or sag in the dial indicator bar. This is vital in ensuring the accuracy of measurements in various applications such as machine tool alignment and calibration.
