What engine pump pressure is necessary to deliver 200 gpm through 200 feet of 2-1/2" hose to a fog nozzle at ground level?

What engine pump pressure is necessary to deliver 200 gpm through 200 feet of 2-1/2" hose to a fog nozzle at ground level?

• A. 100 psi
• B. 116 psi
• C. 120 psi
• D. 130 psi

Answer: (B)

To determine the engine pump pressure necessary to deliver 200 gallons per minute (GPM) through 200 feet of 2-1/2 inch hose to a fog nozzle at ground level, you can use the following method involving friction loss and nozzle pressure. First, you need to calculate the friction loss in the hose. The friction loss for a 2-1/2 inch hose can be calculated using a specific formula: Friction loss (in psi) = (Length in feet / 100) x (GPM / 100)². Substituting the values: 1. Length of the hose = 200 feet. 2. GPM = 200. Friction loss = (200 / 100) x (200 / 100)² = 2 x 4 = 8 psi. Next, you account for the fog nozzle pressure, which is generally around 100 psi for effective operation. Now, combine the friction loss and the nozzle pressure to find the total pump pressure needed: Total pump pressure = Friction loss + Nozzle pressure. Total pump pressure = 8 psi + 100 psi = 108 psi. However, to ensure sufficient pressure at the nozzle and account for additional factors such as

To determine the engine pump pressure necessary to deliver 200 gallons per minute (GPM) through 200 feet of 2-1/2 inch hose to a fog nozzle at ground level, you can use the following method involving friction loss and nozzle pressure.

First, you need to calculate the friction loss in the hose. The friction loss for a 2-1/2 inch hose can be calculated using a specific formula:

Friction loss (in psi) = (Length in feet / 100) x (GPM / 100)².

Substituting the values:

1. Length of the hose = 200 feet.

2. GPM = 200.

Friction loss = (200 / 100) x (200 / 100)² = 2 x 4 = 8 psi.

Next, you account for the fog nozzle pressure, which is generally around 100 psi for effective operation.

Now, combine the friction loss and the nozzle pressure to find the total pump pressure needed:

Total pump pressure = Friction loss + Nozzle pressure.

Total pump pressure = 8 psi + 100 psi = 108 psi.

However, to ensure sufficient pressure at the nozzle and account for additional factors such as