During the annual test of a 750 gpm pump at 50 psi, which flow percentage set must be recorded?

During the annual test of a 750 gpm pump at 50 psi, which flow percentage set must be recorded?

• A. 0%, 50%, 100%
• B. 0%, 100%, 150%
• C. 50%, 100%, 150%
• D. 50%, 100%, 200%

Answer: (B)

The test is designed to verify the pump’s performance across a representative portion of its operating curve, ensuring it can start, deliver its rated flow, and handle an overload condition at the test pressure. Recording three flow points at zero flow, rated flow, and 150% of rated flow provides three critical checks: - At zero flow, you confirm the system can reach the test pressure without flow and that start/valving is functioning correctly. - At 100% of rated flow (750 gpm for this pump) at the specified 50 psi, you verify the pump can deliver its nameplate capacity under the test conditions. - At 150% of rated flow, you test the pump’s ability to meet higher demand and confirm proper behavior of the pump and associated controls (and ensure the head/pressure remains within acceptable limits under overload conditions). These three points give a meaningful snapshot of the pump’s performance. Fifty percent or two hundred percent would either skip a critical check or push beyond standard testing limits, which is not how the test is typically conducted.

The test is designed to verify the pump’s performance across a representative portion of its operating curve, ensuring it can start, deliver its rated flow, and handle an overload condition at the test pressure.

Recording three flow points at zero flow, rated flow, and 150% of rated flow provides three critical checks:

• At zero flow, you confirm the system can reach the test pressure without flow and that start/valving is functioning correctly.

• At 100% of rated flow (750 gpm for this pump) at the specified 50 psi, you verify the pump can deliver its nameplate capacity under the test conditions.

• At 150% of rated flow, you test the pump’s ability to meet higher demand and confirm proper behavior of the pump and associated controls (and ensure the head/pressure remains within acceptable limits under overload conditions).

These three points give a meaningful snapshot of the pump’s performance. Fifty percent or two hundred percent would either skip a critical check or push beyond standard testing limits, which is not how the test is typically conducted.