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Po Review1 Flashcards

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1
Q

Smooth bore tip sizes

A 
1"-210 gpm
1 1/8-264 gpm
1 1/4-325 gpm
7/8-150 gpm
At 50 psi at the tip
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2
Q

Master stream tip sizes

A

1 3/8-500 gpm
1 1/2-600 gpm
1 3/4-800 gpm
2” -1,000 gpm

At 80 psi at the tip for masterstreams

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3
Q

1 1/2 line per 100’ friction loss

A

60 gpm -9psi per 100’
95 gpm -22psi per 100’
125 gpm -36psi per 100’

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4
Q

2 1/2 line friction loss per 100’

A

Drop the last digit from the gpm and subtract 10
Less the 350 gpm
250= 15 per 100’

For flows over 350 gpm drop the last digit OLNY!!!
450=35 per 100’

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5
Q

5”” friction loss

A

Fl=CQ2

1,000gpm

1,000 divided by 100 =10
10x10=100
.08x100=8psi friction loss per 100’

Gpm less then 1,000 use half Q
Gpm greater the 1,000 use Q

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6
Q

Friction loss coefficients

A

1 1/2”=24
2 1/2”=2
5”=.08

FL=CQ2

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7
Q

Nozzle pressures

A 
Combination=100psi
Smoothbore =50psi
MasterStream=80psi
Low pressure=75psi
Foam pro=100psi
Sprinkler nozzle=
Piercing nozzle=100psi
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8
Q

Friction loss

A

Friction loss is
CQ2xL

Coefficient x Q squared x length

Coefficient Q= gpm divided by 100
24-1 1/2”. X 100’ ft sections
2-2 1/2”
.08-5”

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9
Q

Stand pipes

A

Starting pressure 150psi

*imperial 100psi

Add 25psi for stand pipe piping

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10
Q

Relay pumping

A

Start sending water at 60 psi
Keep 20psi residual pressure at all times unless notify the ic

Operations must be shut down from the fire to the hydrant.

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11
Q

Pressure to volume

A

Pressure =series
Green lightVolume= parallel yellow light

Pressure- 1/2 pump capacity 750gpm or high pressure above 200 psi(top floors of a high raise)

Volume-above 1/2 pump capacity 750+ gpm or low psi below 750 gpm (relay or BIG WATER)

Engine speed must be at idle or below 50 psi

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12
Q

Tank to pump piping size?

A

3”

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13
Q

Tank to fill piping size?

A

1”

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14
Q

Pump ratings for testing?

A

1,500 gpm at 100% 150 psi
1,050 gpm at 70% 200 psi
750 gpm at 50% 250 psi

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15
Q

Drafting

A 
Atmospheric pressure is 14.7 psi
1 psi will lift water 2.31 ft 
The more vacuum the more lift
4.7psi will lift water 10'
10' is max lift
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16
Q

Pump priming

A

500-1,250 gpm pumps less the 30 seconds

1,250 to 2,500 gpm pumps take 45 seconds

Add up to 15 seconds for front or rear hook ups

Make sure atmospheric cap and antisyphon hole is free from debris. .04 cm use a paper clip

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17
Q

Impeller speed is —– faster then drive shaft speed?

A

2x faster

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18
Q

Per NFPA 1901
Relief valve
When pump is at capacity and all lines are shut off the internal relief valve or pressure governor should not increase more then ——psi and must happen which in — to — seconds

A

30 psi per NFPA 1901

3 th 10 seconds

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19
Q

How does the internal relief valve work?

A

Recirculates pump gallons inside the pump to maintain the set pump pressure

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20
Q

Pressure govener works by?

A

Regulating the RPMs to main rain the set pump pressure

The RPMS must be over 200 above idle

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21
Q

Pressure relief valves must be —- psi above intake pressure in order to work

A

50 psi above intake pressure

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22
Q

External relief valve works by——-

A

Releases excess pressure to the ground or else it will increase discharge pressure.

Set at 125 psi
Or should be 10 psi higher then the highest hydrant pressure in the city

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23
Q

Why is a BTU

A

British thermal unit

Amount of heat it takes to raise 1 lb of water 1 degree Fahrenheit

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24
Q

Friction loss

Doubling the flow of water will increase friction loss—– times

A

4 times

100 gpm= 4 lbs fl
200 gpm= 16 lbs fl

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25
ICS method for fire flow is------
Length x with divided by 3 | Then times by the number of floors involved
26
Variable flow nozzles mean-----
Change in gpm when stream pattern changes (straight to fog stream)
27
Constant flow nozzles----
Same gpm straight or fog
28
Variable Gallonage nozzles
Adjust gpm by a gallonage ring on the nozzle
29
Automatic variable gallonage nozzles
Automatically reacts to the volume of water supplied This is what we use
30
Engine pressure formula
EP=NP+EL(+ or -)AP+FL Nozzle pressure Elevation (+ or -) Appliance Friction loss
31
Friction loss formula
Fl=CQ2xL FL= friction loss in psi C= coefficient (1 1/2=242 1/2=2 5"=.08) Q=gpm divided by 100 i.e. 300 gpm Q=3 L= length of hose in 100' sections
32
``` R. O. T. (Rule of thumb) 60 gpm- 95 gpm- 125 gpm ```
``` R. O. T. (Rule of thumb) 60 gpm-9psi fl 95 gpm-22psi fl 125 gpm-36psi for ```
33
What is STATIC PRESSURE?
Pressure of water when it's not flowing or stopped i.e. Found on your intake gauge
34
What is RESIDUAL PRESSURE?
Pressure remaining in the system while flowing water
35
Flow is measured with a -----?
Pitot gauge
36
Additional water available from a hydrant percentage method is?
``` (Static - residual)(100) ----------------------- = % Static 10% or less = 3 more lines 11-15% or less = 2 more lines 16-25% or less = 1 more line ``` 250 gpm the static is 70 psi the residual is 63 (70-63=7)x(100)=700 ---=10% 70
37
2 1/2 friction loss wyed to 1 1/2 Gpm. Nozzles 60 95 125 150
Friction loss per 100' 2 1/2 feeding wyed 1 1/2 60-2 95-9 125-15 150-20
38
2 1/2 feeder lines friction loss for master streams Gpm 1 3/8-500 1 1/2-600 1 3/4-800 2"-1,000
Friction loss per 100' supply line to a master stream 1 3/8-500gpm=15fl 1 1/2-600 gpm=20fl 1 3/4-800 gpm=40fl 2"-1,000 gpm=50fl
39
Relay pumping sop
5" gated intake hose to hydrant 5" gated discharge out let Pump in volume Increase rpm until discharge reads 60 psi Maintaine 60 psi as water starts to flow Activate relief valve 20 psi higher then discharge pressure(80) Maintain 20 psi on intake at all times No lower then 10 on orders of ic Increase psi in 20 psi increments(increase relief valve each time you increase discharge pressure Minimum 20 psi residual Maximum 60 psi residual
40
Pressure times area =
Force
41
What is NFPA 1901?
Standard for automotive fire apparatus Pumper design Min 750 gpm pumpers w/300gal tanks
42
What is NFPA 1911
Standard for the inspection maintenance, testing, and retirement of in-service automotive fire apparatus
43
Ambulances defined
Privately or publicly owners vehicles specially designed or constructed and equipped and intended for the transport of persons who are sick , injured, wounded or incapacitated or helpless including dual purpose police cars and funeral coaches or hearses
44
Authorized vehicles
If authorized by the chief of an organized fd or private owned motor vehicles of vol. or paid members of a life support agency licensed by the department of consumer and industry services if authorized by the life support agency During a emergency a vehicle owned and operated by a federally recognized nonprofit charitable organization that is used exclusively for assistance during that emergency.
45
Department means?
Department of state
46
Vehicles having gross weight restrictions and chauffeurs licenses
Does not apply to a fire fighter operating an authorized emergency vehicle who has met the driver training standards of the Michigan fire fighters training council
47
The driver of a authorized emergency vehicle when responding to a emergency but not while returning from a emergency may?
Park or stand irrespective of the provision of this act Proceed past a red or stop sign but only after slowing down as may be necessary for safe operation Exceed the prima facie speed limits so long as he does not endanger life or property Disregard regulations governing directction of movement or turning in specified direction
48
``` How many gallons of water are in 100' of 5"= 2 1/2"= 1 1/2"= ```
5" = 102 gallons 2 1/2= 25 gallons 1 1/2 = 9 gallons
49
Still alarm
Non structure fire including vehicles trash brush Oder investigations and wires down Typically handlers by one station
50
Full alarm
Structure fires involving dwellings garages commercial buildings schools churches apartments and commercial vehicles carrying hazardous or flammable materials. Incident handlers by two or more stations
51
Box alarm
Commercial buildings schools churches apartments and commercial vehicles carrying flammable or hazardous materials or other incidents that EXCEED DEPARTMENT RESCOURCES
52
MABAS
``` Mutual Aid Box Alarm System ``` Western Wayne county fire department mutual aid association is registered as MABAS DIVISION 3203 DHFD is box number 82-DHF
53
Station move up
The next MABAS box alarm department noted in the box card will cover the designed station and handle additional calls. This department will be considered "on deck" for additional box alarm.
54
Still alarm response
First line engine and rescue shall respond. Response mode shall be at the discretion of the incident commander Rescue shall be considered clear for EMS runs at the discretion of the incident commander.
55
Engine response to medical incidents
When stations rescue is unavailable Mass casualty incidents Motor vehicle incidents on major through fares or intersections At the discretion of the duty officer At the request of the LT. Or senior personal on the rescue after assessing the incident.
56
Full alarm response
First engine and rescue respond First line engine and rescue from opposite station respond non emergency. If opposite rescue is first due both engine and rescue drive emergent unless other wise directed by the IC If additional apparatus or man power is needed dispatch shall contact the community indicated on the Mutual Aid Recourse Matrix based in the IC request for aid
57
Box alarm response
Man power call in shall be initiated by chief officers or IC based on needs Reserve engines shall be put in service and utilized as IC needs (on scene station and staging) iC shall order dispatch to call in as many off duty personal to maintain a safe fire ground operation and to mitigate the incident
58
MABAS BOX ALARMS 1-5
1st alarm 3-E, 1-L 1-R 2nd alarm Same as first plus station move up 3rd same as 2nd plus IMT and Salvation Army/Red Cross 4th 3-E 1-L 1-R plus additional apparatus shall respond as determined by the IC. Additional off duty call ins at the discretion of chief officers or the incident commanders 5th same as 4th
59
Mutual aid request-fire
Engine and rescue from appropriate station Responding officer determines if mutual aid is actually needed If determined request is valid call in appropriate number of off duty personal needed Place additional apparatus in service at the responding station Notify the chief and D.C. Dispatch shall notify the DO at the opposite station
60
Chief and D.C. Will be notified when?
All fires w/ smoke or flames visible upon assessment Fires where fatalities or serious injuries to fire fighters or civilians Mutual air fires (given or received) Any mass causality incident Any type of disaster in the city Terrorist threats Haz-mat incidents Any unusual or prolonged rescue operation Any emergency incident where the media becomes involved At the discretion of any fire department officer
61
When to call the Fire Marshal
The fire marshal will determine who is to be contacted in his division On all structure fires On any suspected arson fire or fire that requires cause and determination to be performed On any fire where there are fatalities or serious injury to fire fighters or civilians Terrorist threats Haz-May incidents At the discretion of any fire department officer
62
High pressure gas leaks /outside. No fire
Dispatch call DTE has them respond immediately Spot rig upwind from leak 1st due apparatus enters the block 150 ft away All other apparatus stage 1 block from the break site Request traffic control or road closure from pd Full PPE w/SCBA KEEP WIND AT YOUR BACK ENSURE CO ARE HOOKING UP WATER SUPPLY IN SAFE AREA REMOVE ALL SOURCES OF IGNITION AREA INCLUDING FIRE APPARATUS KEEP BYSTANDERS AND TRAFFIC CLEAR 500' Noise levels can be loude enough to cause physical effects influencing ability to think and act clearly Resource personal may be used as safety officer and shall have the authority to cease all operations if becomes unsafe DTE will control any leaks from high pressure gas mains Fd will protect DTE,FD, and all exposures w/hose lines It is possible to disperse pockets of gas by use of fog lines ( if a fog stream is used do not direct stream on broken pipe in pit
63
Low pressure gas leaks /outside
``` Safety procedures shall apply Keep bystanders clear of area If valve is accessible turn off At the meter if can be done safely Full PPE and hose lines pulled and manned for protection ```
64
Gas leak inside
Evacuate home Ventilate the structure if can be done safely Shut off meter if possible Utilize mini gas monitor to access atmosphere volatility Do not operate electrical switches Natural gas is lighter then air check upper floors Suppress or remove any sources of ignition Only enter structure if all risks of explosion have been mitigated Consider water supply incase of explosion Evacuate endangered occupants inside and in immediate area Restoration of gas should only be done by DTE personnel Allow occupants back into building only after levels have been reduced to 0% and DTE concurs
65
Natural gas fire inside a structure
Be aware gas can still be leaking and moving into different areas so place apparatus accordingly until a determination can be made on the leak area Attempt to shut off gas at the meter If gas can't be shut off safely use a fog stream to control the spread of fire until DTE can shut down Once shut down if gas is complete proceed with structure fire operations

Po Review (4 decks)

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