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Week 3 Block Test 4 > Chapter 16 Fire Hose, Nozzles, Streams, and Foam > Flashcards

Chapter 16 Fire Hose, Nozzles, Streams, and Foam Flashcards

1
Q

Fire hydraulics

A

Deal with the properties of energy, pressure, and water flow as related to fire suppression.

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2
Q

Flow

A

Volume of water that is being moved through a pipe or hose.

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3
Q

1 gallon equal how many Liters

A

3.785

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4
Q

Pressure (Psi)

A

amount of energy in a body or stream of water is measured as pressure.

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5
Q

1 psi equals how many kPa

A

6.894

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6
Q

Friction Loss

A

is a loss of pressure as water moves through a pipe or hose.
Friction loss is influenced by- the diameter of the hose, the volume of water traveling through and the distance the water travels.

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7
Q

Water hammer

A

a surge in pressure caused by suddenly stopping the flow of a stream of water.

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8
Q

Supply hoses (supply lines)

A

used to deliver water from static source or from a fire hydrant to and attack engine.
Types- 2 1/2, 3, 4, 5, 6 inches. Supply hoses are are designed to carry larger volumes of water at lower pressures than do attack lines

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9
Q

Attack hoses (attack lines)

A

usually high pressures, used to discharge water from an attack engine onto fire. Most carry water directly from the attack engine to a nozzle that is used to direct the water onto the fire.

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10
Q

Small- diameter hose (SDH)

A

Ranges in sized from 1 inch to 2 inches in diameter.

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11
Q

Booster hose (booster line)

A

3/4 or 1 inch hard rubber hose, used for small outdoor fires. Also known as forestry hose.

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12
Q

Medium- Diameter hose (MDH)

A

diameter of 2 1/2 inches or 3 inches. either supply lines or attack lines.

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13
Q

Large Diameter hoses (LDH)

A

3 1/2, 4, 5, 6 usually 50ft- 100ft sections

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14
Q

Hose Maintenance NFPA

A

NFPA 1962 Standard for the Inspection, Care and Use of Fire Hose, Couplings, and Nozzles and the Service Testing of Fire Hose.

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15
Q

Cleaning and Maintaining Hose

A
  1. Lay hose flat
  2. Rinse the hose with water
  3. Gently Scrub the hose with mild detergent, paying attention to soiled areas
  4. Turn over the hose and repeat steps 1 and2
  5. Give a final rinse to the hose with water.
  6. Lay or hang the hose and allow it to dry before properly storing it.
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16
Q

Hose Appliance

A

any device used in conjunction with a fire hose for the purpose of delivering water.
Ex. wyes, water thiefs, siamese connection, double-male and double- female adaptors, reducers, hose clamps, hose jackets and hose rollers.

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17
Q

Wye

A

a device that splits on hose stream into two hose streams. Y shaped splits 2 1/2 inch hose line into two 1 1/2 inch hose lines. one female two male connections.

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18
Q

gated wye

A

is equipped with two quarter turn ball valves so that he flow of water to each of the split lines can be controlled independently

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19
Q

Water Thief

A

similar to gated wye but includes an additional 2 1/2 outlet used primarily for attack lines.
two 1 1/2 both male
two 2 1/2 one M, one F

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20
Q

Siamese connection

A

is a hose appliance that combines two female 2 1/2 hose lines into one.

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21
Q

Adaptors

A

for connecting hose couplings that have the same diameter but dissimilar threads.

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22
Q

Double-female adaptor

A

used to join two male hose coupling

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23
Q

Double- male

A

used to joint two female hose couplings used for reverse hose lay

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24
Q

Reducer

A

used to attach a smaller diameter hose to a larger diameter hose

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25
Q

Hose Jacket

A

a device that is placed over a leaking section of hose to stop a leak.

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26
Q

Hose Roller

A

used to protect a hose line that is being hoisted over the edge of a roof or over a windowsill

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27
Q

Hose Clamp

A

Used to temporarily stop the flow of water in a hose line.

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28
Q

Ball Valves

A

used on nozzles gated wyes and engine discharge gates.

29
Q

Gate Valves

A

found on hydrants and on sprinkler systems

30
Q

Butterfly valves

A

Often found on the large pump intake connections where a hard suction hose or soft suction hose is connected. they are opened or closed by rotating a handle one quarter turn.

31
Q

Forward lay

A

starts at the hydrant and proceeds toward the fire the hose is laid in the same direction as the water flows- from the hydrant to the fire.

32
Q

Reverse lay

A

involves laying the hose from the fire to the hydrant the hose is laid in the opposite direction to the water flow.

33
Q

Low-volume nozzle

A

40 gpm or less, used for booster hoses limited to small outside fires

34
Q

Handline nozzles

A

used on hose 1 1/2 inces to 2 1/2, handline streams usually flow between 60 and 350 gpm

35
Q

Master stream nozzles

A

used on deck guns portable monitors and ladder pipes that flow more than 350 gpm

36
Q

Smooth bore nozzles

A

produce solid column of water

37
Q

Fog stream

A

nozzles separate the water into droplets

38
Q

Fixed- gallonage fog nozzle

A

delivers a preset flow at the rated discharge pressure, nozzle could be designed to flow 30, 60, 100 gpm

39
Q

adjustable- gallonage fog nozzle

A

the operator to select a desired flow from several settings by rotating a selector bezel to adjust the sized of the opening. options 60, 95, 125 gpm

40
Q

automatic adjusting fog nozzle

A

can deliver a wide range of flows. as the pressure at the nozzle increases decreases its internal spring loaded piston moves in or out to adjust the size of the opening. 90 to 225gpm while maintaining 100psi discharge pressure

41
Q

Definition of fire fighting

A

Ultra hazardous unavoidably dangerous activity

42
Q

AFD smooth bore parts (3)

A

tip, play pipe, shut off

43
Q

AFD Hoses attack line 1 3/4 inch include PSI section length and load

A

cross lays load threaded 200ft (4- 50ft sections) 275 psi tested max 300 psi cross lay

44
Q

AFD supply line 5 inch PSI and section length and load

A

flat hose load non threaded Storz 800ft max 185 psi except for ladder 1 equipped with high pressure 300 psi neon green

45
Q

AFD 2 1/2 PSI and section length and load

A

Horse shoe load threaded 1200 ft max 275 max tested 300 psi

46
Q

Higbee

A

indicators show the positions where the ends of threads

47
Q

Parts of threaded coupling

A
  1. Male thread shank
  2. Female thread shank
  3. Non threaded shank
48
Q

Elements of hose damage (4)

A
  1. Mechanical
  2. Heat/ Cold
  3. Chemical
  4. Mildew
49
Q

Hose should be inspected when?

A

quarterly and after each use

50
Q

Annual Testing

A

Attack Hose- 300 psi designed 275

Supply Hose- 200 psi designed 185

51
Q

AFD working hose

A
  1. Estimate distances
  2. pull the correct amount of hose
  3. pull the hose make sure it does not tangle
52
Q

Three groups of nozzles

A

Low volume, handline, master stream

53
Q

Hand line Tip sizes and gpm for 2 1/2 hose

A

1 inch= 200 GPM
1 1/8= 250 GPM
1 1/4 = 325 GPM

54
Q

AFD SM20 Fog?

A

1 3/4 hose lines 60-200 GPM

55
Q

Vindicator

A

50 psi, nozzle should be inspected regularly and checked after each use keep clean and clear of debris

56
Q

Conditions that influence Fire Stream

A
  1. Operating pressure
  2. nozzle design
  3. nozzle adjustment
  4. condition of nozzle orifice
57
Q

Condition after fire steam is released

A

velocity, gravity, wind, friction of air

58
Q

essential elements of fire stream

A

pump, hose, nozzle, water

59
Q

Master Stream tips

A

1 3/8= 500 GPM
1 1/2= 600 GPM
1 3/4= 800 GPM
2’’= 1000 GPM

60
Q

Types of loads on structures

A
  1. axial
  2. torsional
  3. eccentric
61
Q

Blitz line 2 1/2 200’ ft min.

A 
Advanced fire conditions
Defensive
Unknown location
Large undivided area
Tons of water
Sprinklers and standpipes
62
Q

Garden Lay

A

Assault pack

63
Q

Pre connect 1 3/4 and 2 1/2

A

2 loops
first 8 inch at 1/3 of hose
second 14 inch 2/3 of hose between second and third coupling

64
Q

If hydrant is not opened all the way

A

pressure builds up and water begins to drain and erosion begins to take place underneath hydrant

65
Q

Master Stream main uses

A
  1. direct attack
  2. exposure
  3. back up exterior hand lines or pump
66
Q

5 inch hose specs

A 
A. Outer Ply: Duristaflex synthetic rubber with ribbed surface
B. Center Ply: polyester fibers
1. warp (longitudinal) 20 cords per inch
2. filler (circular) 15 cords per inch 
C. Inner Ply: polyurethane

Weight 105 lbs (dry) 900 lbs per 100ft charged

67
Q

Techniques learned for hose rolls and carries (8)

A
  1. Drain and carry
  2. Straight roll
  3. single donut method 1
  4. single donut method 2
  5. shoulder fold
  6. staircase carry
  7. self locking doble donut
  8. Street drag
68
Q

1 3/4 Attack line tips (2)

A 
7/8= 160 GPM
15/16= 180 GPM

Week 3 Block Test 4 (4 decks)

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