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CFD 11 Month > IFSTA CH 12 Fire Hose > Flashcards

IFSTA CH 12 Fire Hose Flashcards

1
Q

The primary characteristics to describe fire hose include

A

type of construction/materials used
internal diameter
couplings used to make connections

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2
Q

supply hose

A

transports water from a hydrant or other water supply to an apparatus equipped with a pump

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3
Q

attack hose

A

transports water at increased pressure from the following sources

  • pump-equipped apparatus to nozzles
  • pump-equipment apparatus to a FDC
  • building standpipe tot he point the water is applied to the fire
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4
Q

hose diameter

A

the size of a fire hose refers to its inside diameter

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5
Q

hose length

A

both attack and supply hose are manufactured in 50ft (15m) to 100ft (30m) sections

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6
Q

meters to feet conversion

A

1m = 3.2ft

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7
Q

suction hose (intake hose)

A

used to connect the pumper to a hydrant or other water source

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8
Q

hard suction hose

A

generally constructed in 10ft long sections and is designed for drafting water from static water supplies or connecting to fire hydrant

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9
Q

hose couplings

A

connect hose sections to form a continuous hose line and to connect fire hoses to nozzles, hydrants, pumper connections and FDCs

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10
Q

two different threaded couplings

A

male and female

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11
Q

male coupling thread

A

is cut on the exterior surface

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12
Q

female coupling thread

A

is on the interior surface of a free-turning ring called a swivel

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13
Q

shank

A

portion of the coupling that serves as a point of attachment to the hose

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14
Q

higbee cut

A

flattened angle at the end of the threads on the male and female coupling that prevents cross-threading when couplings are connected

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15
Q

higbee indicator

A

indentation on the exterior of the coupling marks where the higbee cut begins

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16
Q

lugs

A

gasping points where FF can easily hold the couplings when making and breaking coupling connections

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17
Q

three types of lugs are found

A

pin
recessed
rocker

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18
Q

nonthreaded couplings

A

using locks or cams rather than screw heads

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19
Q

two varieties of nonthreaded couplings

A

quarter-turn
storz

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20
Q

quarter-turn coupling

A

has two hook-like lugs on each coupling

the lugs which are grooved on the underside, extend past a raised lip or ring on the open end of the coupling

When the couplings are mated, the lug of one coupling slips over the ring of the opposite coupling and then rotates 90 degrees clockwise to lock

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21
Q

storz

A

most commonly found on large diameter hose

they are joined and then rotated until locked in place to form a connection

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22
Q

non threaded coupling advantages

A

fire hose can be connected quickly

there is no risk of cross threading

double-male or double-female adapters are not needed

23
Q

non-threaded coupling disadvantages

A

Hose can become uncoupled, often suddenly and violently, if a complete connection has not been made

Hydrants require adapters to make connections

Dirt and large debris can become lodged inside the couplings grooves, giving the impression of a tight seal when a hose is actually not connected

24
Q

inspecting hose

A

hose should be inspected and service-tested within 90-days before being placed in service for the first time and at least annually thereafter

25
Q

washing hard rubber booster hose/hard intake hose/rubber-jacket collapsible hose

A

only require rinsing with clear water, although mild soap may be used if necessary

26
Q

washing woven-jacket hose

A

requires a little more care

any dust and dirt should be thoroughly brushed or swept off of the hose

27
Q

drying hose

A

should be dried before being stored

28
Q

Take the following precautions to prevent damage to hose stored in racks

A

Locate hose racks in a clean, well-ventilated room that is easily accessible to the apparatus room/bay

Store hose where it is not exposed to direct sunlight

Pack cotton fabric hose loosely so that air circulates around it

Store hose so that couplings are not in walkways and will not come into contact with equipment or passing personnel

Roll the hose with the male end inside the roll to protect the male coupling threads

Place two-way couplings in a storage rack in a way that prevents dirt or other foreign objects from collecting in their ramp grooves

29
Q

damage to hose

A

mechanical
thermal
organic
chemical
corrosion
age

30
Q

mechanical damage

A

abrasions, cuts and tears

31
Q

thermal damage

A

exposure to fire, heat or freezing temperatures

32
Q

organic damage

A

mold and mildew

33
Q

chemical damage

A

deterioration due to solvent action on synthetic materials and natural fibers

34
Q

corrosion damage

A

rusting of metal couplings

35
Q

age deterioration

A

cracking at points where hose is folded and separation of inner liner from exterior covering

36
Q

straight roll

A

start at the male coupling end and roll toward the female coupling end

simplest of all hose rolls

37
Q

straight roll is commonly used for hose in the following situations

A

Transporting damage or dirty hose to the station for repair, replacement or cleaning

Storing sections of hose in a storage rack or other location

Carrying spare sections of hose in apparatus compartments

Making hose loading easier

38
Q

donut roll

A

commonly used when hose is likely to be deployed for use directly from a roll

39
Q

donut roll advantages

A

FF has control of both couplings, which protects them from damage

hose rolls out easier with fewer twist or kinks

holding both couplings enables a quicker connection to other couplings

40
Q

hose loads

A

there must be a minimum of 800ft (240m) of larger supply hose and 400ft (140m) of attack fire hose

41
Q

three most common loads for supply hose lines are

A

flat
accordion
horseshoe

42
Q

flat hose load

A

easiest to load

works for any size of supply hose and is the best way to load large diameter hose

less likely to damage from apparatus vibration during travel

43
Q

disadvantage of the flat hose load

A

is the hose folds contain sharp bends at both ends of the bed, which requires the hose to be reloaded periodically to change the location of the bends

44
Q

accordion hose load

A

hose is laid on edge in folds that like adjacent to each other

45
Q

combination load

A

This load permits the apparatus to make a forward lay from the water source to the fire, followed by a revers lay back to the water source

One half of the bed is loaded with female coupling exposed and other half ahs the male coupling exposed

46
Q

dutchman serves two purposes

A

changes the direction and/or location of a coupling

47
Q

preconnects

A

primarily lines most fire departments use for fire attack

generally range from 50ft to 250ft in length

48
Q

clearing the bed

A

regardless of the type of load used, the preconnect hose must be fully deployed from the hose bed before charging the line

49
Q

preconnect flat load

A

adaptable for varying sizes of hose beds and is often used in transverse beds

is similar to a flat load except that exposed loops are provided for pulling hose from the bed

50
Q

triple layer load

A

The load begins with hose folded in three layers, the three folds are then laid into the bed in an S-shaped fashion

Load is designed for one person to pull

51
Q

minuteman load

A

One person can pull and advance this load

This load can be carried on the shoulder, completely clear of the ground, which makes it less likely that the hose will catch on obstacles

The load deploys from the shoulder as the firefighter advances towards the fire

52
Q

Booster hose reels

A

Are rubber-covered hose that are usually carried preconnected and coiled on reels

The hose works well for a quick, first attack on small exterior fires

Direct connection provides instant water flow no matter what length of hose is needed

53
Q
A

CFD 11 Month (32 decks)

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