When a pump is supplying multiple attack lines, any sudden flow change in one line will cause a pressure surge or drop in the others. This is called a?

When a pump is supplying multiple attack lines, any sudden flow change in one line will cause a pressure surge or drop in the others. This is called a?

• A. Pressure control device
• B. Surge valve
• C. Flow imbalance
• D. Pressure regulator

Answer: (A)

In a pump feeding several attack lines, a sudden change in flow in one line creates a transient pressure disturbance that travels through the shared supply, causing pressure surges or drops in the other lines. A pressure control device is used to regulate and stabilize the overall system pressure, damping these transients and keeping pressure more uniform across all lines. The other options don’t fit as well: a surge valve responds to surge events but doesn’t continuously manage pressure across all lines; a flow imbalance describes the symptom itself rather than a mechanism or solution; a pressure regulator sets a downstream pressure in some systems but isn’t the typical term for handling cross-line pressure transients in a multi-branch pump setup.

In a pump feeding several attack lines, a sudden change in flow in one line creates a transient pressure disturbance that travels through the shared supply, causing pressure surges or drops in the other lines. A pressure control device is used to regulate and stabilize the overall system pressure, damping these transients and keeping pressure more uniform across all lines.

The other options don’t fit as well: a surge valve responds to surge events but doesn’t continuously manage pressure across all lines; a flow imbalance describes the symptom itself rather than a mechanism or solution; a pressure regulator sets a downstream pressure in some systems but isn’t the typical term for handling cross-line pressure transients in a multi-branch pump setup.