IFSTA 6 Hose Nozzles & Rate Flow Flashcards

1
Q

What is defined as a stream of water or other extinguishing agent after it leaves a nozzle until it reaches the desired point

3rd Ed
page 193

A

fire stream

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2
Q

what are the three basic types of fire stream

3rd ed
page 193

A

solid
fog
broken

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3
Q

define solid stream
3rd
page 194

A

hose stream that stays together in a Solid/compact mass produced by smoothbore nozzle

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4
Q

what is the formula to determine discharge rate of a smoothbore nozzle

3rd
page 195

A

29.7 X d^2 X sq root NP

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5
Q

what three methods may be used to produce a fog stream

3rd ed
page 196

A

Deflection at thePeriphery
impinging Jets
combination

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6
Q

define periphery deflected streams

3rd ed page 196

A

water deflected around an inside circular stem of nozzle

position of stem determines shape of stream

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7
Q

define impinge jet stream

3rd ed page 196

A

several jets of water collide at an angle to create fine, evenly divided particles

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8
Q

define fog stream
3rd ed
page 196

A

Water stream of finally divided particles used for fire control

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9
Q

The reach of a fog stream is directly related to what
3rd ed
page 197

A

width of stream
size of the water particles
wind
volume of water flowing

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10
Q

define constant flow fog nozzle
3rd ed
page 197

A

nozzle designed to flow a specific volume of water on all stream patterns at a specific nozzle discharge pressure

our akron assault

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11
Q

Define select gallonage nozzle
3rd ed
page 197

A

Nozzle allows fire fighter operating Handline to select flow rate at rated discharge pressure

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12
Q

define automatic fog nozzle
3rd ed
page 198

A

aka variable flow nozzles

nozzle with an ability to change patterns while maintaining same nozzle pressure

if gpm changes, it will auto adjust to maintain same pressure & pattern

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13
Q

Which nozzle maintains approximately the same nozzle pressure and pattern even if the gallonage supplied to the nozzle changes

3rd ed
page 198

A

automatic fog nozzle

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14
Q

Which type of fog nozzle are basically variable flow nozzles with pattern change capability and the ability to maintain the same nozzle pressure

3rd ed
page 198

A

Automatic fog nozzle

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15
Q

which type of fog nozzle supplies the selected flow at the rated nozzle discharge pressure

3rd ed
page 197

A

Constant flow nozzles

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16
Q

which type of nozzle discharge the same volume of water regardless of the pattern setting

3rd ed
page 197

A

constant flow fog nozzle

17
Q

which type of fog nozzle serves as a pressure regulator for the pump or as lines are added or shut down ensuring that all available water may be used continuously

3rd ed
page -98

A

Automatic fog nozzles

18
Q

what are the three types of Handline nozzles

3rd ed
page 199

A

solid
fog
broken stream

19
Q

define master stream nozzle
3rd ed
page 199

A

nozzles capable of flowing in excess of 350 GPM must be properly secured for safe operation

20
Q

what two types of streams may master streams produce

3rd ed
page 199

21
Q

define fixed monitor
3rd ed
page 200

A

A.k.a. deck gun

master stream permanently mounted on Apparatus

22
Q

define combination monitor
3rd ed
page 200

A

Maybe used in a mount on the Apparatus or moved in used remotely from the vehicle

23
Q

define portable monitor
3rd ed
page 200

A

Stored on Apparatus for deployment to a specific location to be used

24
Q

define cellar nozzle
3rd ed
page 200

A

A.k.a. distributor
nozzle most often lowered through holes or other openings
deployed for attics & void spaces

25
define piercing nozzle 3rd ed 201
nozzle with an angled case hardened steel tip that can be driven through wall roof or ceiling to extinguish hidden fires Flows approximately 125 GPM at 100 psi
26
define chimney nozzle 3rd ed page 201
Device of brass or steal the small impinging holes flows approximately 1.5 to 3 GPM at 100 psi attached booster hose
27
what is the equation for determining nozzle reaction for solid stream nozzles 3rd ed page 203
1.57 X d^2 X NP
28
what is the formula for determine nozzle reaction of a fog stream nozzle 3rd ed page 204
.0505 X Q X sq root NP