An engine with a 750-gallon booster tank is flowing two 1-3/4 inch handlines at 150 gpm each. How long can operations be supported?

To determine how long operations can be supported with a 750-gallon booster tank while flowing two 1-3/4 inch handlines at 150 gallons per minute (gpm) each, you first need to calculate the total water flow rate being used.

The two handlines together flow a total of:

150 gpm + 150 gpm = 300 gpm.

Next, you can calculate the duration that the 750-gallon booster tank can sustain this flow rate. This is done by dividing the total volume of water in the tank by the total flow rate:

750 gallons ÷ 300 gpm = 2.5 minutes.

Therefore, operations can be supported for 2.5 minutes before the booster tank is depleted. This calculation clearly shows how the water supply is limited by the flow rate in use and confirms that the chosen answer reflects the correct understanding of how to compute available operational time based on water tank capacity and flow rate.