Describe the proper technique for testing and verifying the intake and discharge gauges on a newly serviced pump.

• A. Compare to a calibrated reference gauge, ensure accurate installation, test at various pressures, verify no leaks, and document results.
• B. Read the gauges and record a single pressure.
• C. Replace gauges with digital only and ignore manual.
• D. Ignore testing and rely on experience.

Answer: (A)

After servicing a pump, you want the gauges to give trustworthy readings across the entire range the pump will operate in. The best approach is to verify accuracy against a calibrated reference gauge, make sure the gauges are installed correctly, test them at multiple pressures to confirm they respond accurately throughout the range, check for leaks around all connections so readings aren’t distorted, and document the results for traceability. Comparing to a calibrated standard ensures the readings are within tolerance and not drifted over time. Correct installation prevents reading errors from misalignment, damaged faces, or improper mounting. Testing at low, mid, and high pressures reveals any nonlinearity, sticking, or pressure-dependent issues that a single reading would miss. Verifying there are no leaks guarantees the system isn’t losing pressure before the reading is taken, so the measurements truly reflect the pump’s performance. Documenting the results provides a verifiable record for safety, maintenance history, and compliance.

Reading only a single pressure doesn’t confirm accuracy across the operating range, so it can miss drift or nonlinearity. Replacing gauges with digital only and ignoring manual readings can overlook mechanical issues or compatibility concerns, and skipping the testing altogether is unsafe because it leaves the system without verified, reliable readings.