How many men does it take to hold a fire hose?
15. How many men did it take to hold the fire hoses steady? The water was so powerful that four men couldn’t hold it steady.
What movement should you make with the hose when putting out a fire?
When the nozzle man manipulates that nozzle up or down, move the hose in the opposite direction. For example, the nozzle gets pointed up, the backup firefighter should be manipulating the line downward. Don’t push the nozzle man, move with him taking the weight and nozzle reaction pressure off of him.
How much does a fire hose weigh?
It is an accepted fire service understanding that 5-inch LDH will hold 1 gallon of water per foot of hose. On average, a 100-foot section of 5-inch hose empty weighs 110 pounds.
Why are more firefighters needed to help hold the fire hose when the increase of water flow increases the force of the water when the force of the water increases the reaction force pushing the hose back also increases when the force of the water increases the reaction force pushing the hose back decreases?
Answer: A. When the force of the water increases, the reaction force pushing the hose back also increases.
How do you advance a charged hose?
Advance the charged hose into the fire floor and a second charged line (when possible) to the floor above the fire floor. When advancing a line inside a structure and up a stairwell, move slowly up the stairway, continually monitoring the structural strength of the stairs by sounding with a forcible entry tool.
What kind of hose should be washed with clear water while scrubbing with a stiff brush?
What kind of hose should be washed with clear water while scrubbing with a stiff brush? Most hose-washing machines wash almost any size hose up to: 3 inches (77 mm).
Where should the first hose line be?
The first hoseline should be placed between the fire and any persons endangered by it. This is best accomplished by stretching to and via the primary means of egress such as the front door, main entrance, or main stairway.
What is the correct tool to tighten a hard suction hose?
Spanner, Hydrant Wrench, and Rubber Mallet Spanner wrench – used primarly to tighten and loosen hose couplings, other uses are: Wedge for prying. Opening that fits gas utility valves.
What is a disadvantage of the flat hose load?
What is a disadvantage of the flat hose load? The hose folds contain sharp bends.
What is a hard suction hose most commonly used for?
The intake hose is designed to connect the fire department’s pumper to a portable pump or other water source. There are two types of intake hoses: the hard suction hose, and the soft sleeve hose. The hard suction hose works to draft water from below the pump, which prevents collapsing under vacuum conditions.
Is one of the type of suction hose?
Flexible suction hose, also known as a suction hose, is a specific type of rigid fire hose used in drafting operations. Flexible suctions are built to withstand vacuum, rather than water pressure, abrasion, and heat.
Why does FDNY carry hard suction?
They actually hit some hydrants with hard suction because the rig is too close and it doesnt kink. They do this because of how narrow streets are so they can get close like that to allow a ladder to go by. It’s actually soft suction. FDNY engines don’t carry LDH, so they can’t make a steamer connection.
Which type of load is most commonly used for Preconnected attack lines?
This procedure is similar to the reverse lay evolution, except that the hose will be used as an attack line. Attack hose is loaded so that it can be quickly and easily deployed. The three most common hose loads used for preconnected attack lines are the minuteman load, the flat load, and the triple-layer load.
Which hose diameter is used as both supply line and attack handline?
A 2½-inch (64-mm) hose is used as an attack line for large fires and generally delivers a flow of approximately 250 gpm (946 L/sec). It takes at least two fire fighters to control a 2½-inch (64-mm) handline safely because when the hose is charged with water it can weigh as much as 200 pounds (91 kilograms).
Which hose diameter is used as both supply line and attack line?
Which hose diameter is used as both supply line and attack handline? Generally speaking, a 1 1/2″ (38-mm) attack hose can flow_______.
What volume does a 2 1 2 handline flow?
18. A 2 1/2-inch handline can flow 500 gpm using two firefighters with a 1 1/4-. 1 3/8- or 1 1/1-inch tip or a 500-gpm fog nozzle.
How much water is in a 3 inch fire hose?
156 pounds
What is the minimum flow from a large handline?
BY JASON N. On a large scale, the American fire service has adopted a minimum initial attack handline flow of 150 gallons per minute (gpm) for an aggressive interior attack in residential structure fires.
How much does a 15/16 tip flow?
A 15/16” might not be best because the lowest it flows in the operating range of 40-60 PSI is 165 GPM, but to keep a 150 GPM target flow you could under pump the 7/8” to 45 PSI NP and get 152 GPM.
What psi do you pump a master stream?
80 psi
How many gpm does a deck gun flow?
The deck gun might be a regional term, I have also heard it called the monitor, or the “Stang”, but we are talking about the engine mounted master stream. Most engine mounted master streams, fog, or a stack of smooth bore tips have a flow range of 500 to 1000 GPM.
How do I calculate GPM?
For the best accuracy measure the flow 3 or 4 times and average the times together. The formula to find GPM is 60 divided by the seconds it takes to fill a one-gallon container (60 / seconds = GPM). Example: The one-gallon container fills in 5 seconds, breakdown: 60 divided by 5 equals 12 gallons per minute.
How many GPM can a 1 pipe flow?
Metric PVC Pipe
| Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
|---|---|---|
| 1″ | 1.00-1.03″ | 37 gpm |
| 1.25″ | 1.25-1.36″ | 62 gpm |
| 1.5″ | 1.50-1.60″ | 81 gpm |
| 2″ | 1.95-2.05″ | 127 gpm |
How many gpm do I need?
Average Temp. For example, if you are running 2 showers at the same time, you will need 5 gallons of hot water per minute from the tankless water heater. If you were running a shower and the washing machine at the same time, you would need 4.5 gallons per minute from the water heater.