What is the flow rate of a 2" LW hose with a 2" smooth bore nozzle operating at 55 psi?

What is the flow rate of a 2" LW hose with a 2" smooth bore nozzle operating at 55 psi?

• A. 180 GPM
• B. 220 GPM
• C. 250 GPM
• D. 300 GPM

Answer: (B)

To determine the flow rate of a 2" lightweight (LW) hose equipped with a 2" smooth bore nozzle operating at 55 psi, we can refer to established formulas that relate flow rate, diameter, and pressure. The flow through a smooth bore nozzle can be calculated using the formula: \[ GPM = 29.7 \times D^2 \times \sqrt{P} \] where: - GPM is the flow rate in gallons per minute, - D is the diameter of the hose in inches, - P is the pressure at the nozzle in psi. Using the values for a 2" diameter and a pressure of 55 psi, we can substitute into the formula: \[ GPM = 29.7 \times (2^2) \times \sqrt{55} \] Calculating this step by step: 1. Calculate \( 2^2 = 4 \). 2. Find \( \sqrt{55} \approx 7.42 \). 3. Multiply: \( 29.7 \times 4 \times 7.42 \). This results in approximately: \[ GPM = 29.7 \times 4 \times 7.42 ≈

To determine the flow rate of a 2" lightweight (LW) hose equipped with a 2" smooth bore nozzle operating at 55 psi, we can refer to established formulas that relate flow rate, diameter, and pressure.

The flow through a smooth bore nozzle can be calculated using the formula:

[ GPM = 29.7 \times D^2 \times \sqrt{P} ]

where:

• GPM is the flow rate in gallons per minute,

• D is the diameter of the hose in inches,

• P is the pressure at the nozzle in psi.

Using the values for a 2" diameter and a pressure of 55 psi, we can substitute into the formula:

[ GPM = 29.7 \times (2^2) \times \sqrt{55} ]

Calculating this step by step:

1. Calculate ( 2^2 = 4 ).

2. Find ( \sqrt{55} \approx 7.42 ).

3. Multiply: ( 29.7 \times 4 \times 7.42 ).

This results in approximately:

[ GPM = 29.7 \times 4 \times 7.42 ≈