Both existing centrifugal cooling water pumps will be replaced by two of a higher GPM. Only one pump is used in normal operation and there will be no modifications to their discharge piping. This is an operational concern since increased velocity will increase pipe erosion. What is the fluid velocity in feet/minute in the discharge piping with new pumps, given the following data?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 100.149 ft./min.
Fluid velocity is calculated using the formula V = Q/A. Given the flow rate and pipe cross-sectional area, the velocity is determined by dividing the volume flow by the area. This calculation is essential for assessing potential erosion risks in piping systems when upgrading pump capacities during machinery refits.
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