The gauge and flowmeter test difference should be no more than:

The gauge and flowmeter test difference should be no more than:

• A. 5%.
• B. 10%
• C. 20%.
• D. 15%

Answer: (B)

The main idea behind this item is ensuring that two independent measurements—pressure from the gauge and flow from the flowmeter—agree within reasonable instrument accuracy. In field testing, you compare what the pressure gauge shows with what the flowmeter indicates, and you expect them to be within about 10 percent of each other. This 10% limit reflects typical calibration tolerances for portable MWS equipment and keeps readings reliable enough for safe operation and proper system adjustments. If the difference is larger than 10%, it signals a possible calibration drift, a faulty sensor, or other setup issues that should be investigated and corrected. Smaller differences (like 5%) could be too strict given field conditions and instrument variability, while larger ones (15% or 20%) could hide real problems and compromise system performance.

The main idea behind this item is ensuring that two independent measurements—pressure from the gauge and flow from the flowmeter—agree within reasonable instrument accuracy. In field testing, you compare what the pressure gauge shows with what the flowmeter indicates, and you expect them to be within about 10 percent of each other. This 10% limit reflects typical calibration tolerances for portable MWS equipment and keeps readings reliable enough for safe operation and proper system adjustments. If the difference is larger than 10%, it signals a possible calibration drift, a faulty sensor, or other setup issues that should be investigated and corrected. Smaller differences (like 5%) could be too strict given field conditions and instrument variability, while larger ones (15% or 20%) could hide real problems and compromise system performance.