When conducting discharge pressure gauge and flowmeter operational tests, a difference in readings between the flowmeter and pitot gauge must not be more than:

In the context of conducting operational tests on discharge pressure gauges and flowmeters, a critical aspect is the evaluation of the accuracy and reliability of these instruments. The correct answer indicates that the difference in readings between the flowmeter and the pitot gauge must not exceed 10 percent. This threshold is significant because ensuring that measurements from different instruments align closely is essential for optimal performance and safety during operations.

A 10 percent difference allows for a margin of error that is acceptable within the industry, reflecting well-maintained equipment and accurate data collection. If the discrepancy were to exceed this limit, it could signal issues such as malfunctioning equipment, calibration errors, or operating conditions that deviate from the anticipated norms, potentially leading to poor performance or hazardous situations.

In contrast, higher allowed differences could suggest a lack of precision in measurement that could compromise the integrity of operations. Thus, maintaining a strict adherence to a 10 percent difference ensures that operators can rely on the data being collected to make informed decisions regarding flow rates and discharge pressures in various scenarios.