25 Questions
What is the diameter range of medium diameter hose?
2.5 inch to 3 inches
At what pressure must attack hose be tested annually?
300 psi
Can LDH hose be used as attack hose?
No, unless its use is recommended by the manufacturer
What is the typical flow range for a 1.5" hose?
60 to 125 gpm
What is the approximate weight of a 50 ft dry section of a 2.5" handline?
30 lbs
Hard suction hose usually comes in what lengths?
10 or 20 ft sections
What is the typical flow range for a 1.75" handline?
120-200 gpm
What is the normal flow from a 1" booster hose?
40-50 gpm
What does the choice of diameter for supply hose depend on?
Amount of water needed to supply attack pumper
What is the weight of a 100 ft charged section of a 2.5" handline?
200 lbs
What is the most common inlet size for a wye?
2.5"
What is the main function of a Siamese connection?
Combine two hoses into one
When is a reducer used?
To attach smaller hose to a larger hose
What is the purpose of a hose jacket?
To stop a leak in a hose
Where are ball valves commonly used?
On nozzles, gated wyes, and engine discharge gates
What is the function of a double male adapter in the setup of an engine for forward lays?
To connect the nozzle to the hose
What is the typical flow range for a handline nozzle?
60 - 350 gpm
What is the main characteristic of an adjustable gallonage fog nozzle?
Allows operator to select a desired flow
Where are master stream nozzles commonly used?
On deck guns, ladder pipes, and ground monitors
What is the flow range for master stream nozzles?
More than 350 gpm
What is the operating range of automatic adjusting fog nozzles?
90-225 gpm
How long does it take to produce enough steam to extinguish a fire by discharging 1 gallon of water in 100 cubic ft of involved interior space?
30 seconds
What is the flow range for low volume nozzles?
Less than 40 gpm
What is the most commonly encountered nozzle shut-off for low volume nozzles?
Ball valve
What is the characteristic of an automatic adjusting fog nozzle?
Amount of water flowing adjusts to maintain rated pressure
Study Notes
Hose Characteristics
- Medium diameter hose has a diameter range of unspecified values.
- Attack hose must be tested annually at a pressure of unspecified values.
- LDH hose can be used as attack hose, but with certain limitations.
Hose Flow Ranges
- 1.5" hose has a typical flow range of unspecified values.
- 1.75" handline has a typical flow range of unspecified values.
- 1" booster hose has a normal flow of unspecified values.
- Handline nozzle has a typical flow range of unspecified values.
- Master stream nozzles have a flow range of unspecified values.
- Low volume nozzles have a flow range of unspecified values.
Hose Weights and Lengths
- A 50 ft dry section of a 2.5" handline weighs approximately unspecified values.
- A 100 ft charged section of a 2.5" handline weighs approximately unspecified values.
- Hard suction hose usually comes in lengths of unspecified values.
Fittings and Connections
- The choice of diameter for supply hose depends on unspecified factors.
- The most common inlet size for a wye is unspecified values.
- A Siamese connection is used for unspecified purposes.
- A reducer is used when unspecified conditions are met.
- A double male adapter is used in the setup of an engine for forward lays to perform unspecified functions.
Nozzle Characteristics
- An adjustable gallonage fog nozzle is characterized by its ability to adjust gallonage.
- Automatic adjusting fog nozzles have an operating range of unspecified values.
- Low volume nozzles are characterized by the use of a specific shut-off, which is unspecified.
Fire Suppression
- Discharging 1 gallon of water in 100 cubic ft of involved interior space takes unspecified time to produce enough steam to extinguish a fire.
Valve Uses
- Ball valves are commonly used in unspecified locations.
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