A rubber liner and one or two woven or molded outside covers.
Hard suction hose is made up of?
Rubber line, rubber jacketed, and reinforced with wire or metal bands between the rubber layers. It is used when drafting.
Hard suction hose is available in what lengths?
10ft. lengths and various diameters
Soft suction hose is made up of?
Rubber lined and has a double woven fabric jacket. The outer fabric cover is traditionally made of cotton. Synthetic materials and a combo of synthetic and natural fabrics are becoming increasingly available. Advantage of man made fabrics include lighter weight, reduced mildew and fungus forming.
What is soft suction hose used for?
Only used to hook up to a hydrant.
What is the most common type of discharge hose chosen for structural fire extinguishment?
Woven-jacket, rubber lined fire hose. The interior is lined with natural or synthetic rubber or a combination of the two. The exterior is made of one or two woven layers of fabric of either cotton or synthetic fabric. Thus the hose is identified as single jacketed or double jacketed hose.
What is the standard length woven jacket rubber lined fire hose?
50ft with a male and female coupling at the ends. However the larger diameter supply hoses are common in 100 ft lengths with a coupling at each end.
The most common sizes for single jacket, rubber lined hose are?
1 1/2 and 2 1 /2 inches. This type of hose is used primarily by building occupants for interior fire protection and is stored in cabinets located within the building. Single jacketed hose cannot withstand as great pressure as double jacketed hose.
A double jacketed rubber lined discharge hose is available in?
1, 1 1/2, 1 3/4, 2 1/2, 3, 3 1/2, and 4 in diameters. 1 3/4 is applicable for inside fire attack where mobility is required. Carried on most fire apparatus already preconnected to discharge side of pump.
The 1 3/4 inch double jacketed hose is the backbone of municipal fire fighting. It is used to provide up to how many gallons per minute for hand held fire streams?
250gpm. For safety reasons, hand held streams cant exceed 250gpm.
What inch hoses can be used to suplly master stream appliances requiring 500 to 1000 gpm water flow needs?
2, 2 1/2, 3, or 4 1/2 inch hoses. More 2 1/2 inch hose is carried on fire fighting apparatus than any other size. Most engines carry between 1200 ft. and 2000 ft of 2 1/2.
What inch diameter hose is used to supply master stream appliances?
3 inch diameter. Ground or deck mounted monitors are also classified as master stream appliances.
A fire apparatus aerial ladder can operate as a ladder pipe with a?
1000gpm nozzle at the top of the ladder
A special type of discharge hose that is gaining in popularity is the use of hose as a ?
Supply hose. Supply hose allows the fire dept to provide its own water main in the street.
What are the two types of supply hose and what are the diameters?
single jacketed, synthetic covered type and double jacketed, cotton cover type. Available in 2 1/2, 4, 4 1/2, 5, and 6 inch. Most supply hose purchased today is rubber lined, has a tough synthetic cover and can be reloaded onto apparatus while still wet.
Booster hose, originally developed as chemical engine hose is made of?
Rubber lined and rubber jacketed with one or more internal fabric plies or layers.
What are the sizes of booster hose and what is the normal test pressure?
3/4, and 1inch. Test pressure at 400 lbs per square inch psi. Some special application booster hose is operated at 1000psi. 1 inch is preferred over 3/4 in because it has twice the carrying capability
Which NFPA publication # lists standards for screw threads and gaskets?
194. This publication covers 10 sizes of threaded connections ranging from 3/4 to 6 inch diameters. Today almost all hose couplings are standardized.
For many years couplings were made of brass or bronze alloy materials which are soft and heavy. Today light weight alloys such as what are used for couplings?
Pyrolite. Oil or grease should not be applied to couplings as this may damage the hose. Should be washed with a small brush in a pail of water.
Large bore, high volume nozzle wihch conects to a heavy base and is operated from the ground. Usually supplied by a min of three 2 1 /2 inch lines.
What is the normal service life of fire hose?
10 years although many dept choose to replace it more frequently.
Proper hose pickup techniques?
Never drag and pull. Roll and or carry all hose. Don't drop couplings. This can egg couplings.
The most common chemicals hose is dragged through is?
Oils, greases, paints and acids.
Which solvents easily penetrate the fabric covering of hose and attack the rubber lining?
Petroleum. Low viscosity or thin oils cause damage quickly because of their rapid penetration ability
How do you tell if acid contact has occurred with hose?
Visual inspection. There will be a discoloration of the jacket. When the damaged area is rubbed, the fabric turns to powder. The result is a loss of fiber strength in the jacket
What kind of hose should never be stored when damp, nor should it be stored in place of high humidity?
Cotton jacketed hose. Polyester jacketed hose is treated to prevent mildew.
How often should fire hose be tested to ensure it meets preformance standards?
With the exception of the booster and hard suction hoses, the hose most used is?
Woven jacket variety. Hose beds should be covered by tarps on top and rear.
Relief valves and engine speed governors are operated in conjunction with pumping operations to?
Protect the discharge side of the pump by preventing pressure surges. Especially important when pumping in relay.
Relay pumping is necessary when supplying water through a hose lay over?
2000 feet in length or when pumping up hills.
Operates by sampling the discharge pressure on a pump to maintain a constant flow.
Engine speed governor?
When used in pumping operations, prevents damage to pump by not allowing the engine RPM to vary.
Which NFPA standard provides recommended specifications for fire dept ladders?
What are the different types of materials that ladders are made of?
Wood, aluminum, resin-plastic and combination wood and metal.
At one time most fire dept ladders were made of wood. What type?
Second growth hickory chosen for strength and straightness of grain was preferred.
Resin-plastic ladders are being used because of?
their non conductivity of electricity. However resins are not hear resistant.
Ground ladders vary in length from? And require how many individuals to maneuver?
10ft to 65 ft and 1-6 individuals to maneuver.
Aerial ladders are hydraulically operated and range from?
55ft to over 160 ft and additionally subdivided into elevating platforms, airial baskets and snorkels.
Attic ladder length?
Baby extension ladder is how long?
6-10 ft in length. Can be extended to 10-14ft. Referred to as a two piece ladder with a bed and fly section
Straight ladder length?
12-30ft. Commonly to ladder one or two story buildings
The extension ladder is the strongest and heaviest of ground ladders. The most common lengths are?
24-55 ft in length. Some depts might even have capabilities of reaching 65 ft. but these are very rare. The most common extension ladder is 35 ft. and takes 3 or 4 ff to put in place.
Proper ladder climbing angle?
70 degrees. To determine the angle, take the height to be laddered, divide this by 5 and add 2.
Basically for each 10 ft section of ladder, ? is allowed
1 person is allowed
To help with sizing up a fire scene a ff should allow?
12 ft for each story and three ft as the distance from the floor to the window sill
Ladders requiring two or more people to spot and raise are under the command of?
Person located at the foot of the ladder, away from the bed.
Normally ladders are carried how?
Parallel to the ground with one beam above the other by two or more people.
Ground ladders can come in as many as how many sections?
All locks and pulleys should be clean and well lubricated with?
What must be kept intact on a wooden ladder to maintain is moisture?
Ladder trucks must be able to move at all angles of elevation from?
Below horizontal to vertical
Ladder trucks today use what?
A completely hydraulic process. THe vehicles engine operates a hydraulic pump which in turn powers every function of the ladder and outrigger stabilization arms.
Modern ladder trucks are built in the following configurations?
Standard aerial truck, tower ladder, aeirial articulating platform, special trucks
Standard aerial truck ladder is built today in how many sections?
2 or more
Aerial ladders are normally available in what lengths?
65, 75, 85, an d100 foot lengths. SPecial aerial ladders can be ordered in 105, 125, and 165 ft lengths. One european manufacturer offers a 265 unit.
The midship aerial sports a turntable which swivels 360 degrees right behind drivers cab. The aerial is offered in how many axle configurations?
Both 2 and 3 on a single chassis and no tiller position.
The rear mounted aerial has gaine popularity in recent years. Overall length has been reduced as a portion of the ladder rests on top of the truck cab and extends past the cab. Where is the turntable and how many axles?
Turntable is located at the rear over rear axle. Available in two or 3 axle non tillered. Comes with ful linventory of rescue and salvage equipment.
Tractor trailer has how many axles?
3 axle vehicle with a tiller position. Tiller gives it maneuvarablity like large sedan. Trailer contains equipment and telescopin ladder which can be equipped with a platform or basket. Can be most expensive.
Tower ladder has climbable ladder and operating basket if affixed. What are the general lengths?
85, 95, and 100 ft
An aerial articulating platform with a basket operates in cherry picker style at end of metal column. No steps to reach platform. Advantage to reaching how far?
150ft and being able to drop below ground level to effect rescue. Carries up to 1000lbs of personnell and equipment. Many cities still opt for standard aerial trucks because of cost and maintence
Special ladder vehicles carry few if any ladders. THere function is?
Large diameter nozzle with the ability to be moved hydraulically from below gground to nearly 100 ft. No access by steps