What are the pump ratings?

What are the pump ratings?

• A. 140 psi and 30 gpm
• B. 120 psi and 25 gpm
• C. 100 psi and 20 gpm
• D. 150 psi and 40 gpm

Answer: (A)

Pump ratings describe the combination of discharge pressure and flow that a pump is specified to deliver. It isn’t just how much water it can move, but how much water volume (gpm) it can push at a given pressure (psi) when the system resistance is taken into account. This rating helps you size hoses, nozzles, and anticipate how well the pump can push water through elevations and along long runs. The given rating of 140 psi at 30 gpm represents a high-pressure, moderate-flow performance that a typical shipboard DC fire pump is designed to provide. This balance ensures sufficient force to overcome hose friction and elevation while still delivering a practical amount of water through the nozzles. Other options that show lower pressure and lower flow would not meet the same operating point on the pump’s curve and would limit reach or nozzle performance. Conversely, higher pressure with higher flow isn’t usually feasible for this pump’s rated condition. So, 140 psi at 30 gpm is the best match for the pump’s specified rating.

Pump ratings describe the combination of discharge pressure and flow that a pump is specified to deliver. It isn’t just how much water it can move, but how much water volume (gpm) it can push at a given pressure (psi) when the system resistance is taken into account. This rating helps you size hoses, nozzles, and anticipate how well the pump can push water through elevations and along long runs.

The given rating of 140 psi at 30 gpm represents a high-pressure, moderate-flow performance that a typical shipboard DC fire pump is designed to provide. This balance ensures sufficient force to overcome hose friction and elevation while still delivering a practical amount of water through the nozzles.

Other options that show lower pressure and lower flow would not meet the same operating point on the pump’s curve and would limit reach or nozzle performance. Conversely, higher pressure with higher flow isn’t usually feasible for this pump’s rated condition. So, 140 psi at 30 gpm is the best match for the pump’s specified rating.