What is the first test point calculated when testing a gage?

• A. 25% of the range span
• B. 50% of the range span
• C. 75% of the range span
• D. 0% of the range span

Answer: (A)

The first test point used when testing a gage is typically at 25% of the range span. This initial point is important because it allows the technician to assess the accuracy and performance of the gage at a lower range of measurement. Testing at 25% provides valuable insight into the linearity and behavior of the gage at a point that is not at the extremes, which can often be more critical for understanding the gage's overall functionality.

By starting at this lower percentage, it's easier to identify any issues that may occur before progressing to the midpoint and full scale. If a gage performs well at this lower range, it can improve confidence in its performance at higher ranges. This approach follows a logical method of calibration that ensures thorough testing throughout the gage’s operational limits.