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Engineer Manual Flashcards

1
Q

What is the most basic function of the fire service?

A

The ability to carry water and provide fire streams

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2
Q

Per the engineers manual, how many engines are there city-wide?


A

Over 55

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3
Q

What must the engine always be prepared to do?

A

Respond, provide protection for the crew, and function properly and efficiently on scene

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4
Q

What two things are crucial to maintaining apparatus readiness?

A

Scheduled inspections and preventative maintenance

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5
Q

Discrepancies shall be recorded where? Located? Click first and then?

A
  • Daily apparatus check off, located in JFRD portal

* First click Tactical Support tab and then Daily Apparatus Management

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6
Q

Safety or Operational concerns shall be brought to the attention of whom?

A

Company officer with appropriate logbook entry

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7
Q

Who do you contact for any maintenance related issues?

A

Tactical Support Facility (TSF)

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8
Q

When any JFRD equipment is noted as being lost, found, stolen, or damaged in any way, who do you notify?

A

Company officer immediately

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9
Q

Diesel exhaust is carcinogenic and no level is safe, according to whom?

A

NIOSH and NFPA

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10
Q

What’s the first thing you should do in your daily engine inspection?

A

Conduct brief conference with off going engineer

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11
Q

Ensure proper fluids to include - (5)

A
  • Motor oil
  • Transmission fluid
  • Coolant
  • Power steering fluid
  • Diesel exhaust fluid (DEF)
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12
Q

Who do you contact with any questions about proper fluids?

A

TSF

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13
Q

Proper air brake pressure both front and rear? What else must you check?

A
  • > 100 psi

* proper operation of brakes

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14
Q

Tired and wheels - (4)

Min. tread depth?

A
  • tire pressure
  • lug nuts
  • axle seals
  • tread depth

4/32” or when tread wear indicators are even with the tire tread

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15
Q

Once started the motor, how long must it run?

A

Until it reaches normal operating temperature. Verify normal readings on all cab mounted gauges

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16
Q

With TANK-TO-PUMP engaged : (7)

A
  • verify pressure on master discharge gauge
  • operate primer until water is discharged
  • ensure proper operation of the governor in both PSI and RPM modes
  • ensure proper operation of the transfer valve (if equipped)
  • operate electric intake valves fully-open and fully-closed
  • discharge water from at least one discharge opening
  • open and close each 5” intake valve then remove the cap to drain
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17
Q

What do you open to briefly flush sediment from the lowest level of the pump?

A

PUMP DRAIN

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18
Q

Tilt cab and inspect what?
Check for what?
What should you do prior to tilting cab?

A
  • inspect all drive belts for tightness and wear
  • check batteries for leaks and tight connections
  • secure loose cab equipment prior to tilting
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19
Q

View underside of the engine for?

A

Pump or tank leaks

Check motor, transmission, pump transfer case, and drivetrain for fluid leaks

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20
Q

Before climbing under apparatus, what should you ensure first?

A

Air brakes are set

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21
Q

When inspecting exterior, what should you note?

A

Any new body damage

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22
Q

Defibrillator check off?

A

Change batteries and ensure proper operation. Ensure all equipment is in place for immediate use

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23
Q

Portable oxygen check off?

A

Tank pressure >1000psi and oxygen delivery adjuncts are properly stocked

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24
Q

Air chisel check off?

A

Connect to air bottle and ensure proper operation ( >4000psi)

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25
Q

What do you use for chainsaw bar lubricant?

A

Motor oil

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26
Q

Hydraulic pump and tools check off?

A

Check gas, oil, hydraulic fluid levels. Ensure proper operation of motor and pump.

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27
Q

Store hydraulic spreaders how far apart?

A

1/2” between tips

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28
Q

Generator check off?

How long until warmed up?

A

Check oil and coolant.

Run generator until fully warmed up (approx. 5mins)

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29
Q

Why do you shut off fuel supply to portable gas motors and run until motor stalls?

A

Clears fuel lines and prevents damage from gasoline additives

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30
Q

What should you add to newly acquired fuel?

A

Fuel stabilizers

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31
Q

Who established a maintenance schedule?

A

Company Captain

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32
Q

How often should you wax apparatus?

A

Monthly or in accordance with the company maintenance schedule

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33
Q

What should you use to lubricate roll up doors? Door hinges?

A
  • silicone spray

* light oil

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34
Q

How many air tanks under the engine?

Bleed for how long?

A
  • four

* bleed until discharging air is free of moisture

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35
Q

Inspect internal casing for what? If intake valve swivel does not move freely?

A
  • rust or sediment buildup and proper operation of the valve

* apply soapy water and work until loose

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36
Q

After back flushing pump, ensure pump is primed :

A

Place engine in pump gear, open the TANK-TO-PUMP valve, and operate primer

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37
Q

How to clean hand tools?

A

Use soap and water to clean, dry thoroughly. Apply light oil to steel surfaces and moving parts. Apply linseed oil to wood handles

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38
Q

How to clean ladders?

A

Clean with soapy water and all moving parts manipulated. Inspect heat indicators for discoloration and inspect entire ladder for physical damage. Use light oil sparingly to lubricate roof hooks.

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39
Q

How to clean nozzles?

A

Soapy water and a soft brush. Immerse nozzle in warm soapy water and operate all moving parts.

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40
Q

How to clean couplings?

A

If swivels frozen or stiff, apply warm soapy water and rotate swivel

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41
Q

How to clean chainsaw?

A

Inspect air filter, remove and clean if indicated. Remove chain assembly and clean chain drive. Use air pressure to remove debris from hard to reach areas

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42
Q

How to clean air tools?

A

Soapy water and dry thoroughly. Lubricate each blade with light oil.

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43
Q

How many drops of air tool oil into blade end?

A

5 drops

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44
Q

What should you check on SCBA bottles?

A

Hydrostatic dates

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45
Q

What should you check portable extinguishers for?

A

Proper charge and annual inspection date

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46
Q

How is rope inspected?

A

In accordance with SOG 419

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47
Q

How to clean high-lift jack?

A

Soapy water and dry thoroughly. Wipe down tool with light oil, including moving parts. Inspect jack for bent or damaged components

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48
Q

How to clean chains?

A

Soapy water if dirty, and dry thoroughly. Wipe down length of chain sparingly with light oil. Inspect links for damage or corrosion.

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49
Q

How to clean come-along?

A

Clean with DRY cloth. Use light oil sparingly on moving parts. Inspect cable for broken strands, corrosion, or wear. NO lubricants on wire rope. If wire rope gets wet or is exposed to moisture it must be dry thoroughly. Inspect handle for straightness.

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50
Q

How must all lubricants be used?

A

Sparingly

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51
Q

Light oil :

A

Liquid wrench, WD-40, or similar water displacing lubricating oil, typically in an aerosol can

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52
Q

Air tool oil :

A

supplied with air chisel in a small squeeze bottle

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53
Q

Two-cycle oil :

A

Added to gasoline to lubricate two-cycle engines

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54
Q

Silicone spray :

A

Used on roll-up door tracks and slide out compartment trays. It leaves minimal residue. Do not use silicone on other moving parts. Remove dirt prior to applying silicone

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55
Q

Graphite :

A

Recommended to ease the movement of pump valve handles. It can be applied to the remote control handle shaft and mechanism, from the pump panel to the valve handle attachment. Remove dirt prior to applying graphite.

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56
Q

Grease :

A

Only grease permitted is “food grade” machinery grease. Apply to appliance and pump threads as needed

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57
Q

Fuel stabilizer :

A

Add to newly acquired gasoline according to label

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58
Q

DEF :

A

Diesel exhaust fluid used in some engines to reduce nitrogen oxide emissions

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59
Q

A complete daily inspection shall be performed immediately when service occurs that requires engine to be OOS for how long?

A

24hrs or any period that spans two shifts

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60
Q

If service was performed and the engine returned on the same shift, the following checks must be completed prior to returning to service : (4)

A
  • visual verification that the booster tank is full
  • verify pump and governor operates properly (in both modes)
  • verify proper brake pressure and brake operation
  • ensure all equipment is accounted for
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61
Q

When spotting the engine, give priority to _____? (EMS response)

A

Location of the rescue unit and stretcher access. Consider safety of pt when loading.

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62
Q

On busy streets, what should you use to protect pt loading area?

A

The engine

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63
Q

What is the primary consideration for engine placement?

A

Safety of the patient and responders

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64
Q

Use the engine as a barricade to block or divert traffic, which will accomplish what?

A

Allow room to safely manipulate the patient and/or stretcher or to advance hose lines

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65
Q

What should you consider when treating pts?

A

Engine noise and location of exhaust pipe

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66
Q

What may require spotting uphill/upwind?

A

Spills or leaks

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67
Q

Use what as needed for scene safety?

A

Police

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68
Q

If extrication is needed, what should you consider?

A

Placement needs of the ladder truck or extrication engine

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69
Q

If apparatus is facing oncoming traffic at night, what should you do?

A

Turn off headlights to improve night vision of approaching vehicles

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70
Q

The first arriving engine and ladder company should be spotted where, in most cases?

A

In front of the structure

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71
Q

Where should the first arriving engine and ladder be spotted?
How should you position the engine?

A
  • In front of the structure in most cases

* For placement of attack lines while leaving room in front of the structure for the ladder company

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72
Q

On multi-story structures, what is engine placement? Why?

A

Same as for single story structures, but the engine should be placed to leave the building corners open. Permits ladder co. To place the turntable in a spot to reach two sides of the structure

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73
Q

Where should you NOT park?

A
  • do not park under power lines

* do not park too close to involved structures

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74
Q

Hose line considerations?

A
  • leave room to deploy hose lines

* keep hose away from the exhaust pipe

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75
Q

Newer engines need how much space on officers side to lower ladder rack?

A

5 feet

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76
Q

Who should you contact prior to attempting removal of any engine that has become stuck?

A

TSF

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77
Q

When can you drive on private driveways or private bridges?

A

During emergency response

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78
Q

When backing, where should the spotter be? Why?

A

On engineer’s side, 5-10 feet from the tailboard. This places the spotter in the most visible location for the engineer and allows the spotter full view of the rear of the engine.

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79
Q

What must the engineer and the spotter maintain?

A

Eye contact

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80
Q

Our primary water supply comes from where?

A

Fire hydrants; part of a city wide distribution network that also consists of wells, treatment plants, pumping stations, and water mains operated and maintained primarily by JEA

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81
Q

Main sizes range from ____ in diameter and average what psi static pressure?

A
  • 6” to 24”

* 70psi

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82
Q

What communities operate their own water utilities?

A

Atlantic Beach, Neptune Beach, and Baldwin

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83
Q

In some cases, hydrant pressure is provided by what?

A

Head pressure from water towers

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84
Q

An alternative to the water main system is what?

A

Static source

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85
Q

All city fire hydrants are equipped with what size inlet, supplied by what?

A

6” inlet supplies by the water main system

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86
Q

The flow (GPM) will vary based on what? (Hydrants)

A

Diameter of the water main and water main pressure

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87
Q

What can interfere with hydrant flow? (4)

A
  • dead end mains
  • partially closed street valves
  • sediment buildup
  • damaged mains
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88
Q

City fire hydrants, supply main sizes

Residential -

Commercial -

A
  • 6” to 10”

* 8” to 24”

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89
Q

Places that may utilize a private water supply? (5)

A
  • commercial plants
  • schools
  • shopping centers
  • aircraft hangars
  • apartment complexes
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90
Q

What might be located at high risk facilities (chemical or petroleum)?

A

High pressure systems

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91
Q

Private fire hydrants (industrial facilities)

Static pressure?

A

Up to 175psi

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92
Q

Private fire hydrants (apartments and business complexes)

Supply mains size?

A

Dead end mains or loops

6” to 10”

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93
Q

Private hydrants are transitioning to what color? As of when?

A

White as of 2016

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94
Q

NFPA color codes

Blue -
Green -
Orange -
Red -

A
  • 1500 GPM or more
  • 1000-1499 GPM
  • 500-999 GPM
  • Below 500 GPM
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95
Q

Where may purple hydrants be found?

Why are they installed?

A
  • on reclaimed water mains

* maintenance flushing

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96
Q

What size are access holes on access holes?

A

About 12”

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97
Q

What does drafting utilize to supply a fire pump through hard suction hose?

A

Atmospheric pressure

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98
Q

What are fire department pumps equipped with to reduce pressure inside the pump below atmospheric pressure?

A

Primer

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99
Q

What determines the flow from the booster tank?

A

Size of the TANK-TO-PUMP valve and head pressure

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100
Q

Flow from booster tank is limited to what?

A

700-800 GPM

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101
Q

Booster tank should be refilled from where?

A

ONLY from city hydrants and ALWAYS from the nearest source

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102
Q

Size of dry hydrant connection?

A

4 1/2” steamer

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103
Q

Considerations before using dry hydrant?

A
  • is hydrant properly maintained by the property owner? (Damaged)
  • can the engine gain access to hydrant?
  • is there sufficient water available?
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104
Q

Who are JFRD engines built by? What are they fitted with?

A

Built by Pierce and fitted with midship mounted Waterous centrifugal pumps

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105
Q

What are engine pumps rated at?

A

1500, 1750, or 2000 GPM

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106
Q

How many different sections does the modern fire pump have? What are they?

A

Three

  • intake manifold (lower half of pump body - green arrows)
  • discharge manifold (upper half of pump body - red arrows)
  • centrifugal pump assembly (including impeller(s) - yellow arrows)
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107
Q

Where is pump transfer case mounted? What does it do?

A
  • Below the pump (blue arrows)
  • it transfers power from the diesel motor to the drivetrain (in ROAD position) or to the pump impellers (in PUMP position)
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108
Q

What are JFRD engines powered by?

A

Six-cylinder turbo-charged diesel motors, manufactured by Caterpillar (C12 or C13) or Cummins (ISL series)

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109
Q

What type of design does the impeller have?

A

A “flow-through” design

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110
Q

What does intake pressure do?

A

Adds directly to the pressure produced by the pump

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111
Q

What does “slippage” do?

A

Prevents a continuous rise in discharge pressure but can generate excessive heat within the pump

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112
Q

Why can’t centrifugal pumps, pump air?

A

Due to their open design

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113
Q

Running the pump dry may cause what?

A

Excessive heat and pump damage

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114
Q

What does centrifugal force theory state?

A

A spinning object will exert force from the center towards the outer edge

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115
Q

Where does the impeller discharge water? What does that chamber do?

A

Volute, this chamber directs the pressurized water into the discharge manifold

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116
Q

As motor speed (RPM) increases, what happens to the impellers?

A

The velocity of the impellers increases

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117
Q

The pump shift controls what type of gear, where?

A

Ring gear, within transfer case

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118
Q

When is the neutral position used?

A

Only in the event of a failure with the pump shift requiring use of the manual pump shift control

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119
Q

Who tests centrifugal pumps?

A

Underwriters Laboratories (UL) in accordance with NFPA 1911

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120
Q

What does the pump test measure?

A

Volume at three pressures while drafting

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121
Q

What is the volume at 150psi called?

A

Rated capacity

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122
Q

A 1500 GPM engine must pump :

  • 100% of rated capacity at ___
  • 70% of rated capacity at ___
  • 50% of rated capacity at ___
A
  • 150psi (1500 GPM)
  • 200psi (1050 GPM)
  • 250psi (750 GPM)
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123
Q

What may the data plate also include?

A

Test RPM and governed speed

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124
Q

In pressure setting, each impeller provides pressure on ___

A

Series

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125
Q

In pressure setting, how much of the total pressure is produced by each impeller?

A

50%

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126
Q

The volume position is also called ____

A

Parallel or capacity

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127
Q

What is the advantage of the two-stage design?

A

Ability to operate in either setting : pressure (series) for max pressure or volume (parallel) for max volume

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128
Q

Attempting to pump high pressure in volume will require what?

A

Excessive RPM

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129
Q

When pumping beyond 50% of a pumps rated capacity, you must be in what setting?

A

Volume

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130
Q

How is changing between the two settings accomplished?

A

Transfer valve

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131
Q

What is normal position of transfer valve? Why?

A

Volume; it will produce max pump performance for the majority of pumping scenarios

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132
Q

What is main difference in operation from a single-stage pump to a two-stage pump?

A

Motor speed

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133
Q

A single stage pump will operate much like what?

A

A two-stage pump in volume

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134
Q

How many intakes do JFRD engines have?

What are they?

A
  • Four or five
  • two 6” steamer intakes and two 2 1/2” auxiliary intakes (often called “pony” intakes) Some engines have an additional 5” intake on front or rear w/electronically controlled valve
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135
Q

Both types of intake valves incorporate what 4 things?

A
  • water control valve
  • spring-operated pressure relief valve
  • bleeder valve to bleed air from supply hose
  • 5” Storz adapter
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136
Q

How is the pump protected from excess intake pressure?

A

Intake pressure relief valve built into the pump and PIV/BIV also include pressure relief valve for redundant pump protection

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137
Q

What psi are both the internal pressure relief valve and PIV/BIV preset at?

A

150psi

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138
Q

What is the diameter of the intake pipe determined by?

A

Rated capacity of the pump

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139
Q

What size are the front and rear intake pipes? What will they flow at draft and from hydrant?

A
  • 5”

* 1000 GPM at draft, 1500 GPM from hydrant

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140
Q

E7 and E21 have one additional intake inside tailboard compartment. What type of intake is it? What color is it painted?

A

Direct tank fill; red

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141
Q

E7 and E21 are equipped with what? Where is the foam solution metered?

A

Foam proportioners; water for the foam solution is metered through the red intake into the booster tank for more accurate finished foam

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142
Q

Most intake and discharge valve are ___?

A

Quarter-turn ball valves

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143
Q

The electric front and rear intake valve take how long to fully open or fully close?

A

15-20 secs

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144
Q

What should you do before charging supply line connected to front or rear intake valve?

A

Partially open valve; valve may be held closed by hydrant pressure otherwise

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145
Q

Most commonly used valves?

A

TANK TO PUMP and TANK FILL

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146
Q

When the water supply is from a source other than booster tank, what must be closed?

A

TANK TO PUMP

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147
Q

What is critical to avoiding loss of prime?

A

Bleeding air from intake lines

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148
Q

JFRD engines discharge options range from what?

A

1” booster line to a 4” LDH discharge

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149
Q

Each gauge is of what type?

A

Compound type

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150
Q

Master discharge gauges read from what psi? Vacuum scale?

A
  • 0-600 psi

* 0 to -30 inches

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151
Q

Master Gauges - intake on which side? Discharge?

A
  • intake on left

* discharge on right

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152
Q

Why is a primer required?

A

Due to centrifugal pump inability to move air

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153
Q

What is the electric primer?

A

A rotary vane pump driven by a small electric motor and activated by a pull handle on the pump panel

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154
Q

Unlike the centrifugal pump, the primer is what type of pump?

A

Positive displacement pump which can pump air and water

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155
Q

When the primer is activated, what happens?

A

It creates a vacuum within the fire pump, removing air so water can enter the pump

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156
Q

If primer is inoperative, what are the two alternative methods for bleeding air from the pump? How effective are these methods?

A
  • partially open deck gun valve, it will help purge air and prime the pump
  • partially open TANK FILL valve, small amounts of air can be purged
  • either of these methods may prime the pump faster than using the primer alone
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157
Q

Where do both types of priming pumps draw current from? What RPM provides best performance?

A
  • vehicle charging system

* best performance between 1000-1200rpm

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158
Q

How many motor functions to be monitored while pumping? What are they? Perimeters?

A
  • four
  • oil pressure : 15psi at idle; 35-45psi at speed
  • coolant temp : 180-220 degrees fully warmed up
  • voltage : 13 to 14.5 bolts
  • transmission temp : under 300 degrees is normal
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159
Q

Where are gauges located?

A

Pump panel and are redundant of cab gauges

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160
Q

What will low voltage indication result in?

A

Gradually reduce motor RPM

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161
Q

What could high coolant temp or low oil pressure result in?

A

Motor damage

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162
Q

What is another thing you should always be aware of while pumping?

A

Motor RPM

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163
Q

How many GPM does pump cooler/recirculating line flow? Generally, when is this valve needed?

A
  • Less than 25 GPM

* when hoselines are charged but not flowing

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164
Q

The engine cooler or auxiliary cooler valve operates as what?

A

Heat exchanger

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165
Q

What must be engaged for the engine cooler valve to function?

A

Pump must be engaged

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166
Q

To operate the pump efficiently and safely, what does the engineer need?

A

A device for setting pressure (throttle) and controlling discharge pressure (pressure relief)

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167
Q

Each JFRD engine utilizes an electronic pressure governor which combines what two things into one device?

A

Throttle and pressure relief

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168
Q

A pressure governor can make automatic adjustments to ___ pressure to compensate for variables in ___ pressure.

A
  • Discharge

* Intake

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169
Q

The governor is integrated into what system? What does it control and how?

A

The governor is integrated into the motors fuel management system and controls pump discharge pressure (PDP) by changing motor RPM

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170
Q

The pressure governor consists of only two major parts -

A

The control box (located on pump panel) and pressure sensor (installed within the discharge manifold)

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171
Q

What does the pressure sensor monitor? What does it transmit and where?

A
  • PDP

* PDP signals to the control box

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172
Q

Where and what does the control box transmit signals to?

A

Transmits signals to the motors fuel management system to increase or decrease RPM as required to maintain the PDP as set by the engineer

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173
Q

When the pump is engaged, what is disabled?

A

The cab throttle controls (accelerator pedal and high idle switch)

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174
Q

Any changes to the discharge pressure will be compensated by the governor through what?

A

A change in rpm

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175
Q

What is the most common disruption to PDP?

A

The opening and closing of nozzles

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176
Q

Any change to intake pressure will also be felt where?

A

Discharge side of the pump

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177
Q

The engineer must select PSI mode for the following fireground operations : (3)

A
  • pumping hand lines
  • pumping ladder pipes or ground monitors
  • supplying a sprinkler or standpipe system
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178
Q

Selecting RPM MODE disables what?

A

The pressure sensor

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179
Q

Engineers must select RPM mode for the following fireground operations : (5)

A
  • drafting
  • relay pumping
  • charging 5” hose
  • PSI mode malfunction
  • pump operations that excess 300 PSI
180
Q

When relay pumping, only which engine needs to operate in PSI mode?

A

Attack engine

181
Q

If there is a PSI mode malfunction what is most likely to cause?

A

Most likely a failure of the pressure sensor or a loss of electronic signals between the pressure sensor and control box

182
Q

Other than rapid pressure increases of what PSI, there is no pressure protection in RPM mode?

A

In excess of 30 PSI

183
Q

With each governor type the following steps must be accomplished in the order listed to ensure proper operation : (4)

A
  1. Engage the pump
  2. Open the TANK TO PUMP valve
  3. Open the appropriate discharge valve
  4. Operate the governor
184
Q

What must the pressure sensor detect to operate?

A

PDP in the pump

185
Q

If the governor will not increase PDP and you have insured an adequate water supply what should you suspect?

A

Air in the pump

186
Q

What will the digital readout display when the pressure sensor cannot detect PDP?

A

LO PRESSURE or LO SUPPLY

187
Q

Changing modes is accomplished by pressing and holding what button for how long?

A

Mode button or PSI/RPM button for 3 seconds

188
Q

Who programs PRESET button? What are presets for engine/tanker PSI and RPM?

A

• TSF

  • engine - 110psi
  • tanker - 50psi

• engine/tanker - 1100RPM

189
Q

The pressure governor can also serve as what?

A

A high idle control in RPM MODE with the pump disengaged

190
Q

In volume mode, The discharge pressure at idle will be what psi?

191
Q

If your water supply runs low what will the governor do? If the pump cannot maintain at least what psi the governor will return the RPM to idle? What does the safeguard prevent?

A
  • increase RPM
  • at least 30 PSI
  • prevent cavitation
192
Q

If you attempt to exceed 700-800 GPM what will happen?

A

The digital readout may indicate LO SUPPLY or LO PRESSURE And the governor will return rpm to idle

193
Q

If you need to supply the deck gun from the booster tank, what should you use?

A

Fog nozzle at 500 GPM or

1 1/4” or 1 3/8” tip

194
Q

When residual pressure gets low, (what psi) what may happen?

A

Below 10 psi; the governor may sense a supply problem and return RPM to idle

195
Q

Attempts to pump low volume at high pressure (such as booster line) may cause what?

A

Mild cavitation in the pump which the governor may falsely interpret as a low water supply and return the RPM to idle

196
Q

If you find the governor control box without power after engaging the pump, what may you have to do?

A

You may have to disengage the pump, shut off the motor and batteries, re-initiate the starting sequence and re-engage the pump

197
Q

When connecting 5” hose to the intake valve, what should you never do?

A

Never place a right hand twist in the hose. It may uncouple upon charging

198
Q

If a hose clamp is used when laying out, where must the clamp be placed? How far back should you clamp?

A

Close to a coupling on the supply side. Always clamp at least 25’ back from tailboard

199
Q

When shall crossing 5” hose be done?

A

Only in an emergency

200
Q

A flow of 1200 GPM has what friction loss per 100’ section of hose? What is the practical limit of 5” hose?

A
  • 10 psi

* 1600 GPM

201
Q

Pumping 5” hose requires two-stage pumps to be operated in ____?

202
Q

When relay pumping, maintain a minimum of ? And never exceed ?

A
  • min. 10 psi

* never exceed 200 psi PDP

203
Q

The 6” ball intake valve (BIV) will flow ?

A

In excess of 2000 GPM

204
Q

2 1/2” hose used for : (4)

A
  • FDC - to supply sprinkler or standpipe
  • Master Stream - to supply ground monitor and mini-monitor
  • Handline - high volume handline for large fires. May also be used to supply a gated wye
  • Supply - to transfer water between apparatus on scene
205
Q

2 1/2” pre-connected handline
Advantage :
Disadvantage :

A
  • rapid deployment, up to 300 GPM

* relatively short lengths (200’ or less) may be limiting factor for large area structures

206
Q

2 1/2” static load
Advantage :
Disadvantage:

A
  • ability to carry several hundred feet of hose so the proper length can be deployed
  • the engineer must break the coupling and connect to the desired discharge outlet
207
Q

2 1/2” Siamese uses : (3)

A
  • for joining two 2 1/2” hose lines together to form one hose line
  • augmenting the FDC to increase sprinkler or standpipe flow
  • can be used during “modified tanker shuttle”
208
Q

Max. safe flow through a 2 1/2” handline?

209
Q

To compensate for friction loss in 2 1/2” handlines add what psi per 100’ for the PDP?

A

10 psi per 100’

210
Q

Akron Turbojet 2 1/2” Fog Nozzle

Operates at what psi NP? Adjustable flow range of ?

A
  • 100 psi

* 125, 150, 200, and 250 GPM

211
Q

Which nozzle has a “break apart” feature that allows a 1 3/4” hose to be extended from play pipe?

A

Akron Turbojet 2 1/2” fog nozzle

212
Q

Rotating the bumper fully clockwise on the Akron Turbojet 2 1/2” fog nozzle will do what?

A

Shut off nozzle even if bale is open

213
Q

Akron Turbojet Nozzle (1 3/4”) has how many settings ranging from ? What does JFRD recommend for GPM setting for initial interior firefighting?

A
  • Five settings ; 30-200 GPM

* 95, 125, or 150 GPM

214
Q

Always check what at beginning of your shift and prior to use?

A

GPM setting

215
Q 
Akron Turbojet (75 PSI) fog nozzle :
An initial PDP of what PSI will allow the nozzle operator to select 95, 125, or 150 GPM on the nozzle and attain this flow?
216
Q 
Akron Turbojet (75 PSI) fog nozzle : 
A desired flow of 200 GPM requires an increase in PDP from 110 PSI to \_\_\_\_. What may be required for safe handling?
A

150 PSI; two firefighters

217
Q 
Akron Turbojet (100 PSI) fog nozzle : 
A pump discharge pressure of \_\_\_ PSI will allow the nozzle operator to select 95, 125, or 150 GPM on the nozzle and attain this flow.
218
Q 
Akron Turbojet (100 PSI) fog nozzle :
A desired flow of 200 GPM requires an increase in PDP from 135 PSI to \_\_\_ . What may be required for safe handling?
A

175 PSI; two firefighters

219
Q

What is a quick remedy for when 75 PSI nozzle handlines kink?

A

Increase initial PDP when charging, then reduced to the recommended PDP

220
Q

If the nozzle operator experiences a sudden PSI loss while advancing what should they suspect?

A

A kinked line

221
Q

If hose kinks become frequent the engineer can boost PDP by ?

222
Q

Akron Saberjet Nozzle :
The fog ranges from what? What can it not produce?
The smooth bore can be configured for ?

A
  • narrow angle to a wide angle and cannot produce a straight stream
  • 7/8” or 15/16” tip
223
Q

Akron Saberjet Nozzle :
Fog stream setting will flow
____ GPM at 100 PSI NP

224
Q

Akron Saberjet Nozzle :

A PDP of ___ PSI will produce above flows with 150’ or 200’ hose

225
Q

Akron Saberjet Nozzle :

When solid stream is selected this nozzle may require what for safe control?

A

Two firefighters

226
Q

Akron Saberjet Nozzle :

Friction loss increases ___ PSI when changing from fog to solid stream.

227
Q

Akron Turbojet Booster Hose GPM settings :

A

13, 25, 40, and 60 GPM at 100 PSI

228
Q

Sustained high pressure combine with low pumping volume can contribute to what?

A

High pump temperature and impeller damage

229
Q

Who carries the newer type of strainer? What characteristics does it have?

A

Engines equipped with front intakes;

Red in color and has 6” threads

230
Q

Soft intake hose will flow ? (6”)

A

In excess of 2000 GPM when connected to a ball intake valve (BIV)

231
Q

High rise packs :

High rise nozzle ?

A

One - 2 1/2” lightweight nozzle equipped the following way. Bail shut off, mini stream shaper, short stack tips (size 1 1/8” and 1/2” low flow)

232
Q

High Rise Bag : (13)

A
  • 2 1/2” in-line pressure gauge
  • 2 1/2” gate/ball valve
  • 2 1/2” lightweight elbow
  • 1 1/2” x 2 1/2” increaser
  • 1 1/2” fog nozzle
  • 2 spanner wrenches
  • marking device
  • 6 - disposable flow sticks
  • 14-18” pipe wrench
  • flat blade screwdriver
  • Philips head screwdriver
  • Allen wrenches
  • 6-8” crescent wrench
233
Q

Attic nozzle/distributor nozzle :
Lengths? Size of lengths? Accessories?
These nozzles cover how many sq. ft.?
GPM and PSI?

A
  • two lengths of 1 1/2” aluminum pipe (6’ and 2’), a 1 1/2” x 2 1/2” increaser and a standard 2 1/2” play pipe
  • 1000 sq. ft. of attic space
  • Approx. 125 GPM at 100 PSI
234
Q

What is the attic nozzle ideal for?

A

Fires caused by lightning strikes

235
Q 
What is class a foam? 
What is it educated at? 
A
  • Class a foam is actually a wetting agent and can break down the surface tension of water permitting greater penetration of water into class a fuels.
  • 1/4% to 1%
236
Q

What does AR-AFFF stand for?

A

Alcohol resistant aqueous film forming foam

237
Q

Two types of Class B foam JFRD carries?

A

Ansulite Lo-Viscosity AR-AFFF and

Thunderstorm AR-AFFF

238
Q

What are AR-AFFF foams effective on?

At what percentage are they educated?

A

• Hydrocarbon fuels (gasoline, kerosene, diesel fuel)
• polar solvents (ethanol and ethanol blends, methanol, and ketones)
• 3%

239
Q

All gasoline now contains at least what percentage of ethanol?

240
Q

What apparatus carry 3% Mil-Spec AFFF in their foam tanks?

A
  • Engines 7 and 21
  • Stations 16 and 56
  • Foam 37 and 371
241
Q

Aviation fuel is what type of fuel?
What is it similar to?
What would be most effective on these fires/spills?

A
  • non-polar hydrocarbon
  • similar to kerosene
  • Mil-Spec AFFF
242
Q

Although Foam 37 and 371 tankers respond citywide, what is their main purpose? How much foam does each tanker carry?

A
  • Their main purpose is to protect the Navy Fuel Depot which primarily stores aviation fuel
  • 1800 gallons of foam concentrate
243
Q

How much foam concentrate shall each engine carry? (Class B)

A

15-18 gallons of concentrate or three-four pails (3 gallons per 100 gallons of tank capacity)

244
Q

Each tanker shall carry how much foam concentrate?

A

Enough foam concentrate to convert 2500 gallons into finished foam. Min. of 75 gallons of concentrate or 15 pails (3 gallons per 100 gallons of tank capacity)

245
Q

A foam eductor rated at ___ GPM. This device is adjustable from ___% to ___%. It is used with the standard ___” handline

A
  • 125 GPM
  • 1/4% to 6%
  • 1-3/4”
246
Q

Akron foam tube attaches to what nozzle only?

A

1-3/4” Akron Turbojet nozzle only

247
Q

Max. distance between eductor and nozzle ? If more distance is required, what should you do?

  • 75 PSI nozzle :
  • 100 PSI nozzle :
A
  • 75 PSI nozzle max. distance 250’
  • 100 PSI nozzle max. distance 150’
  • use 2-1/2” hose and gated wye
248
Q

The foam eductor requires an inlet pressure of ___ PSI.

249
Q

Who carries several large caliber master stream appliances for foam and dry chemicals?

A

HazMat Teams and St. 37

250
Q

Who carries the Akron 250 GPM eductor and foam tube? What size hose is it used with? Distance allowed between eductor and nozzle? Inlet pressure?

A
  • Engines 7, 21, and 31
  • 2-1/2” hose and 2-1/2” Akron Turbojet nozzle
  • 300’ between the eductor and nozzle
  • 200 PSI inlet pressure
251
Q

JFRD maintains emergency stockpiles of foam where? What is the total of JFRD foam capacity?

A
  • TSF and Station 37

* Approx. 20,000 gallons

252
Q

Shelf life for Class A foam?

What shape pail?

A

Indefinite; square pails

253
Q

Which foam is considered a hazardous material to the environment?

254
Q

AR-AFFF specifications : (3)

A
  • compatible with dry chemicals
  • cannot be used for subsurface injection
  • can be used with fresh or salt water
255
Q

Engine ground ladder compliment

A
  • 24ft extension ladder
  • 14ft roof ladder
  • 10ft attic ladder
  • some engines carry Little Giant
256
Q

24ft extension ladder : (3)

A
  • first story access
  • second story window access
  • second story balcony access
257
Q

14ft roof ladder : (3)

A
  • first story roof access
  • interior access (tall ceilings)
  • roof work with hooks deployed
258
Q

10ft attic ladder : (3)

A
  • interior scuttle access
  • interior attic access
  • some first story windows
259
Q

Engine extrication equipment : (8)

A
  • high lift jack w/lifting hook
  • air chisel and 3 blades (long flat, short flat, panel)
  • come-a-long
  • chains in lengths 6ft, 12ft, and 15ft
  • j-hook w/shackle
  • step chocks (min. of three)
  • ladder cribbing (min. of one)
  • assortment of 4x4 cribbing
260
Q

Extinguishers carried by engines :

A 
• foam
• carbon dioxide (CO2)
• purple k (PKP) 
• some companies carry MET-L-X or 
LITH-X
261
Q

Foam extinguisher :

A
  • 2-1/2 gallon ARC foam
  • range : 15ft
  • rating : 3A:20B
262
Q

Carbon Dioxide (CO2) :

A
  • 20lb CO2
  • range : 8ft
  • rating : 10B:C
263
Q

Purple K (PKP) 18lb :

A
  • 18 pound
  • 18ft in 18 secs
  • 80B:C
264
Q

Purple K (PKP) 30lb :

A
  • 30lb
  • 18ft in 8 secs
  • rating : 20B:C
265
Q

How can the 30 pound Purple K extinguishers be identified?

A

Red handle

266
Q

Which companies carry MET-L-X and/or LITH-X?

A

Companies that possess Class D hazards in their district

267
Q

What are sodium bicarbonate extinguishers effective on?

A

Class B and C fires

268
Q

What powers the 10 kilowatt (KW) generator? Where does it receive fuel from? Where is start switch? What does it power?

A
  • Twin-cylinder diesel motor
  • receives fuel from the main fuel tank
  • electric start switch on the pump panel and dashboard
  • powers five scene lights (front, sides, and rear) and a 30 amp cord reel on the rear for fans and lighting
269
Q

What is the winch powered by? How far does the wire rope extend and what is it’s pulling capacity?

A
  • 12 VDC receptacles located at multiple points on the engine
  • 100ft; 9000lb pulling capacity
270
Q

What can be used to estimate the available water supply?

A

Static pressure and residual pressure

271
Q

After stopping the valve at the desired pressure, what should you do?

A

Turn the discharge handle 45 degrees to lock in position

272
Q

Ladder pipe nozzle PSI?
Automatic fog nozzle rated up to?
Waterway is limited to?
Smooth bore tips range up to?

A
  • 80 PSI
  • 2000 GPM
  • 1000 GPM
  • 2”
273
Q

When supplying a ladder pipe within 100’ the recommended initial PDP is ___ PSI (any nozzle)

274
Q

Mid-ship turntables have ___ intakes, while rear-mount turntables have ___ intakes.

A
  • side

* single rear intakes

275
Q

Master stream fog nozzle PSI?

Flow is adjustable in increments of ?

A
  • 100 PSI

* 500, 750, 1000, and 1250 GPM

276
Q

Add what PSI for friction loss in master stream appliance in addition to NP?

A

10-25 PSI

For higher GPM expect friction loss to be closer to 25 PSI

277
Q

Add ___ PSI FL for each 100’ of 2 1/2” Siamesed hose for friction loss

278
Q

Mini-monitor flows up to what GPM at what PSI? A hose lay in excess of ____ will require the what?

A
  • 500 GPM at 100 PSI
  • 200’
  • Siamese and dual 2 1/2 hose lines
279
Q

Be sure to bleed incoming air from supply hose for what reasons?

A

To prevent loss of prime or governor malfunction

280
Q

What are the four options the engineer has when connecting to the hydrant?

A
  • single 5” hose
  • 6” hard suction hook-up
  • full hydrant hook-up
  • single 6” soft sleeve hose
281
Q

What hose provides the most volume from a hydrant?

A

Hard suction

282
Q

Where should you spot the engine when performing hard suction hook up?

A

Spot the engine with the front bumper even with the hydrant

283
Q

If the hydrant is already in use and you want to shut down hydrant and swap the hard suction, how long should it take?

A

Preferably less than one minute

284
Q

Prior to shutting down the hydrant, who should you establish communication with?

A

The engineer on scene

285
Q

When is 6” hose preferred?

A

Maximum volume is needed, but hard suction hose is impractical

286
Q

Hard suction and 6” soft sleeve hose connected to a high flow hydrant will permit flows _____

A

Up to 2000 GPM

287
Q

How much more water will you get with full hydrant connection?

A

In most cases this will provide a 25% increase in water supply

288
Q

What are the two limitations for source and relay engines?

A

200 PSI maximum PDP and 10 PSI minimum residual pressure

289
Q

What is practical limit of 5” hose?

A

1600 GPM (four times the capacity of 2 1/2” hose)

290
Q

Two stage pumps must be operated in what mode when relay pumping?

291
Q

What is the standard method to supply another engine on scene?

A

By discharging water

292
Q

Try to place the engine within ___’ of the FDC.

293
Q

What is PDP for supplying sprinklers?

294
Q

When supplying sprinklers, what does a drop in pressure indicate?

A

An increase in flow - a sign that more sprinkler heads have opened

295
Q

Initial PDP for supplying standpipes?

A

Initial 100 PSI

296
Q

What is required when supplying standpipes?

A

A remote pump operator (RPO) utilizing gate/ball valve and PSI gauge on standpipe outlet

297
Q

If FDC has frozen swivel, what should you do?

A

Install a 2 1/2” double male and then a double female

298
Q

If the FDC is blocked or inoperable, what should you do?

A

Use a 2 1/2” double female and a Siamese to pump into the first floor standpipe outlet. Be sure to open the standpipe valve.

299
Q

What will not allow you to pump into a first floor standpipe outlet?

A

Pressure reducing standpipe outlet valves

300
Q

If additional flow is needed to FDC, what should you do?

A

Place one or two Siamese adapters into the FDC

301
Q

Older buildings may have a pressure limitation on their standpipe system of ___PSI.

302
Q

What are the three options you can use when operating from a private high pressure system to make the pressure more manageable and increase safety for the nozzle crews?

A
  • use discharge valve to gate down discharge pressure. (Never gate down intake lines)
  • connect to private hydrant and use the engine’s pump as distribution manifold only leaving the pump disengaged
  • lay lines from the nearest city hydrant. You will have more control over intake and discharge pressures
303
Q

Why should you never gate down intake lines?

A

This can reduce intake and discharge pressures but sacrifices available volume

304
Q

For drafting the transfer valve must be placed in what position and governor in what mode?

A

Volume ; RPM

305
Q

What is the max. height for drafting? Measured from where?

A
  • 25ft.

* measured from the surface of the water to the steamer connection

306
Q

What is the theoretical limit to the length you can draft?

A

There is none

307
Q

If the surface of the water is ___’ below the steamer do not expect to reach full pump capacity

308
Q

The static source must be deep enough to allow how much water around strainer?

A

One foot of strainer clearance from the bottom and 18” below the water surface

309
Q

What will shallow placement of the strainer create?

A

A vortex, drawing air into the strainer and causing loss of prime

310
Q

Pumps rated at 1750 or 2000 GPM must use what to reach full pump capacity?

A

Both steamer connections

311
Q

Before activating the primer, what should you increase RPMs to?

A

1000-1200 RPM

312
Q

1500 GPM primer use -

1750/2000 GPM primer use -

A
  • 45 seconds

* 90 seconds when using both steamer connections*

313
Q

Exceeding time limits of primer may cause what to happen?

A

The electric primer to overheat or the pneumatic primer to reduce air supply

314
Q

When activating primer, allow pressure to build to what before disengaging the primer?

A

Steady above 50 PSI

315
Q

What should you do after you’ve built steady pressure on discharge gauge and disengaged primer?

A

Slowly open discharge valve and increase RPM

316
Q

What should you do if there’s a sudden pressure drop?

A

Simply activate the primer until steady pressure is restored

317
Q

Tankers may be dispatched into areas with hydrants, who should you consult with about preferred water supply?

A

District chief

318
Q

JFRD tankers pumps?

A

Single stage 750 GPM centrifugal pumps

319
Q

JFRD tankers are manufactured by who? What pump? Water capacity?

A

Pierce; utilize Hale or Waterous pump, and hold 2500 gallons vented and baffled

320
Q

What is the pump shift mechanism?

A

Power take off (PTO)

321
Q

How much foam is carried on tankers?

A

75 gallons of AR-AFFF Class B foam and 10 gallons of Class A foam

322
Q

Size of quick dump valve?

323
Q

What is the most common use on scene with tanker?

A

Nurse tanker; place close to the attack engine and supplying water directly

324
Q

If use of the tanker basin is indicated, what will the first tanker do? (4)

A
  • drop the basin on scene in position for the engine to draft
  • drop the low level strainer, tarp, and 4-1/2” double male at the scene
  • place the tarp on the ground and set up the basin
  • dump the water and proceed to the closest water source
325
Q

What is optimum tanker basin placement?

A

Tanker basin placed in front - only blocks one traffic lane

326
Q

How long does it take to dump 2500 gallons of water from the quick dump valve?

A

2-3 minutes

327
Q

What are the best fill and dump sites?

A

Located so tanker engineers can drive the complete route in a straight line without backing up

328
Q

What is tanker refill time?

A

Approx. 3 mins.

329
Q

What is recommended PDP for tanker filling?

330
Q

What is formula to determine GPM tanker shuttle?

A

GPM = tanker gallons/time

331
Q

Dual basins : what size short section of PVC to connect basins? How should you secure it?

A

8-10” section of PVC secured by simple backboard straps

332
Q

Fire pumps combine what three things that can present problems?

A
  • mechanical operation
  • electronic controls
  • human decision making
333
Q

Friction generated between the impeller and pump water can build heat rapidly if water is not moving, which is common when?

A

During overhaul

334
Q

What are the ways to recirculate water? (Prevent pump overheating - 4)

A
  • open the pump cooler discharges water into booster tank
  • opening tank fill valve even a small amount will discharge more water into tank
  • the booster line can be charged and nozzle placed into tank vent
  • if water supply is ample an unused hose line can be opened just enough to keep water moving
335
Q

What can contribute to motor overheating?

A

Unusually hot weather and operating at high RPMs

336
Q

What does the cooling system need?

A

An adequate supply of coolant and unrestricted air flow through the radiator

337
Q

If unable to build pressure, what is most commonly the cause?

A

Air in the pump

338
Q

If activating the primer is unsuccessful, what should you do?

A

Change to RPM mode and increase throttle speed

339
Q

If you can verify the pump is properly engaged and air has been bled, what is the next step?

A

Verify that you have a water supply

340
Q

When does cavitation occur?

A

When an attempt is made to pump more water than is available

341
Q

What is the earliest indication of cavitation?

A

Fluctuating PDP

342
Q

What does it mean when an increase in RPM does not result in a corresponding increase in PDP? Any further attempt to increase pressure will result in what?

A
  • You have maximized your water supply

* cavitation

343
Q

At critical velocity, any effort to increase velocity (by increasing PDP) creates turbulence in the stream and results in what?

A

Loss of stream reach and integrity

344
Q

Critical velocity can lead to ?

A

Pump cavitation and reduced volume from the nozzle

345
Q

If the engineer observes a poor quality stream, what should they consider?

A

Critical velocity

346
Q

If an increase in PDP does not result in an apparent increase in volume ?

A

You have reached critical velocity

347
Q

What should the engineer do when critical velocity is reached?

A
  • reduce throttle RPMs
  • reduce the nozzle flow - change the smooth bore tip or adjust the fog nozzle flow to the next lower setting
  • increase hose size - the same volume that resulted in critical velocity in 1-3/4” hose will flow better through 2-1/2” hose
348
Q

An inability to prime is almost always caused by ____

349
Q

What are the most common causes of air leaks?

A

Partially open valve or an open bleeder

350
Q

If still unable to draft after taking care of possible air leaks, what should you do?

A

Attempt to displace air with the booster tank water. At same time you engage the primer, open TANK TO PUMP valve for a few seconds.

351
Q

The pressure created by the weight of air, which is 14.7 psi at sea level and gradually decreases as elevation increases

A

Atmospheric pressure

352
Q

A device used to protect water supplies from contamination.

A

Backflow preventer

353
Q

The quantity of water a pump will discharge also see rated capacity) ; Another term for the volume position of the transfer valve enabling the pump to deliver higher volumes of water

354
Q

A mechanical device that uses a rotating impeller to increase the pressure of a fluid. The fluid energy pump impeller along the rotating axis and his accelerated by the impeller, flowing in a radial motion outward into a volute from where it exits into the discharge me the phone

A

Centrifugal pump

355
Q

A gauge indicates both positive pressure psi and negative pressure vacuum

A

Compound gauge

356
Q

The maximum velocity of a hose stream. Any in attempt to increase pressure beyond Critical velocity results in a drop in discharged volume

A

Critical velocity

357
Q

When an engine draws water from a static source such as a pond, lake, River, tanker basin, or swimming pool

358
Q

The water or foam solution from the time it leaves a Nozzle until it reaches the fire

A

Fire stream

359
Q

A gauge that indicates flow volume and reads in GPM

360
Q

A device that mixes water and some concentrate to provide a properly mixed foam solution

A

Foam proportioner

361
Q

A drop in pressure due to the friction between the water and the inside of a hose, pipe, or appliance. Friction loss increases as diameter is reduced, length is increased, or volume has increased

A

Friction loss

362
Q

A pressure control device that uses motor speed rpm to control discharge pressure

363
Q

Gallons per minute, the unit for measuring volume flow

364
Q

The rotating vein within a centrifugal pump that imports velocity to water

365
Q

The pressure exerted by the height of water above a discharge orifice

A

Head pressure

366
Q

The science of water in motion

A

Hydraulics

367
Q

Testing of a pressure vessel for leaks or floss. Testing is very important because containers containing compressed gas can rupture violently if they fail

A

Hydrostatic test

368
Q

Flammable liquids which are compounds of hydrogen and carbon. Includes gasoline, diesel fuel, kerosene, and aviation fuel’s.

A

Hydrocarbon fuels

369
Q

The pressure exerted in the opposite direction when water is discharge from a nozzle

A

Nozzle reaction

370
Q

The volume setting of a two stage pump. Water enters both impellers from the intake source. Also called capacity

371
Q

A flammable liquid containing polarized molecules which includes alcohols and ketones

A

Polar solvents

372
Q

Force per unit area. Within a fire pump pressure is produces water leaves in Pellerin enters the volume. This room also identify as one word to settings of the transfer valve, and one of to settings of the pressure governor

373
Q

A type of pump that pumps a definite volume with each stroke or revolution. Examples include rotary vein or rotary gear. This does not include centrifugal pumps

A

Positive displacement pump

374
Q

The unit for measuring water pressure

A

Pounds per square inch psi

375
Q

To remove air from a centrifugal pump and replace it with water

376
Q

The pressure setting of the fire pump controlled by the throttle and indicated on the Master discharge gauge

A

Pump discharge pressure PDP

377
Q

A device that Controls the transfer case or PTO of the fire pump, shifting between the road position and pump position

A

Pump shift

378
Q

The capacity of a fire pump, as tested at draft by underwriters laboratory you all. Test results are posted on the pump panel of every rated pump

A

Rated capacity

379
Q

The oxidation process where diesel suit is burned within a diesel particulate filter and turned to ash

A

Regeneration

380
Q

Water supplied by one or more Engines located remote from the fires in and pumping to the scene through supply house

A

Relay pumping

381
Q

The unit for measuring motor speed

382
Q

Pressure setting of a two stage pump. Water enters one impeller which discharges water to the second power

383
Q

A centrifugal pump with a single impeller

A

Single stage pump

384
Q

Fireground water supply that is motionless

A

Static pressure

385
Q

Refers to the 4-1/2” connection on a fire hydrant. This term is also used for the 6” side intakes on a fire pump

386
Q

Supplying a second engine with residual pressure by connecting intake to intake

A

Tandem pumping

387
Q

Mechanical device within a two stage pump that changes from pressure operation to volume operation

A

Transfer valve

388
Q

A centrifugal pump, with two impellers on a common shaft, operating in pressure (series) or volume (parallel)

A

Two stage pump

389
Q

Any pressure less than 14.7 psi at sea level

390
Q

The quantity of water in gallons per minute GPM. One of two positions for the transfer valve

391
Q

The Chamber around a pump impeller which converts water velocity to pressure

392
Q

The forward speed of water as it moves through a hose line or nozzle

393
Q

The sudden increase in force that occurs when a Nozzle or valve is open or closed suddenly. The forward velocity of the water reverses direction and doubles its force in the opposite direction

A

Water hammer

394
Q

1 gallon of water weighs

395
Q

One cubic foot of water contains

A

7.481 gallons

396
Q

One cubic foot of water weighs

397
Q

Atmospheric pressure at sea level

398
Q

Perfect vacuum (theoretical) 

A

29.9 in. Hg

399
Q

1 pound per square inch (PSI) lifts

A

2.304 feet

400
Q

Max. lift (theoretical)

401
Q

NFPA required vacuum

A

22 in. Hg.

402
Q

NFPA required lift

403
Q

Each foot of water in a column exerts

404
Q

Fire hose shall be tested between what dates?

A

March 15 to April 15

405
Q

5” and 6” hose shall be tested at what pressure for how long?

A

200 PSI for five minutes continuously

406
Q

3” hose or less shall be tested at what pressure for how long?

A

Per the marked service test pressure (per NFPA 1962) for five minutes continuously. If the service pressure is not indicated, test at 250 psi for five minutes continuous 

407
Q

How do you back flush the pump?

A

With the pump disengaged pressurize the discharge side of the pump from a hydrant. Briefly open each intake and discharge valve to flush (it is not necessary to flush cross lay piping) 

408
Q

When do you ensure proper operation of chainsaw?

A

After reassembly, ensure proper operation

409
Q

Daily engine inspection : (15)

A
  • Conduct brief conference with off-going engineer
  • Ensure proper fluid levels to include motor oil, transmission fluid, coolant, power steering fluid, and DEF
  • Booster tank and foam levels must be checked by visual observation into tank
  • Ensure proper air brake pressure both front and rear (>100PSI) and proper operation of brakes
  • Tires and wheels - axle seals, tire pressure, tread depth, lug nuts
  • Seat belts - ensure all sets operate and adjust properly
  • W/motor running check all running lights (including brakes and backup lights) all visual and audible warning devices and scene lighting
  • Verify the pump engaged and tank-to-pump open (steps)
  • Disengage pump then open/close each manual valve to verify smooth operation
  • Open and close all bleeders. Open pump drain
  • Tilt the cab and inspect all drive belts for tightness and wear. Check batteries for leaks and tight connections (secure loose equipment prior to tilting)
  • View underside of the engine for pump or tank leaks. Check motor, transmission, pump transfer case and drivetrain for fluid leaks
  • Sweep dirt and debris from cab and wipe down surfaces as needed
  • Inspect apparatus exterior and note any new body damage
410
Q

What is another type of private system (water)?

A

Private main that is connected to a city main through a meter and back flow preventer

411
Q

Secondary methods to supply large volumes of water on a private system?

A
  • Tanker shuttle
  • Laying from nearby city main
  • Laying from adjoining private system
412
Q

Where are dry hydrants found?

A

Near commercial structures (usually at retention ponds) where city hydrants are not within reach

413
Q

To pump high pressures, what does the single stage pump require?

A

Higher RPM

414
Q

In most pumping situations, what will be the difference in pump performance between single stage and two stage pumps?

A

Minimal difference

415
Q

The intake side of a centrifugal pump is an open manifold directing water where?

A

To the impellers

416
Q

Large diameter intakes and discharges use quarter turn valves controlled by hand wheel or electronic control. Due to large volumes, they must be of “slow operating” type, why?

A

To prevent water hammer

417
Q

The coolant temperature gauge indicates what?

A

The motor cooling system temperature

418
Q

Where does pump cooler/recirculating water come from?

A

The supply

419
Q

Where does engine cooler water come from?

A

Pump water

420
Q

Why should you routinely operate the transfer valve in volume?

A

This will result in more efficient operation of the pressure governor and is not harmful to the pump or motor

421
Q 
Minimum hose inventory of each engine company shall consist of :
6” -
5” -
2 1/2” -
1” booster -
10ft hard suction -
High rise packs -
Preconnected 1 3/4” attack handlines-
Wildland hose -
Apartment pack -
A 
• 25’
• 1000 feet
• 1000 feet
• 200 feet
• 2 (two) sections
• 195’ of 2 1/2” HR hose
• 2 (two) 200 foot 1 3/4 cross lays 
All other 1 3/4” attack hoselines length per company Captain
• 200’ of 1” hose
• 100’ of 1 3/4”
422
Q

What shall be readily available for laying a supply line?

A

Rope “hydrant loop” with hydrant wrench and two 5” spanner wrenches

423
Q

A flow of what GPM in 5” hose has a friction loss of 10 PSI per 100’ section?

424
Q

What is booster line used for?

A
  • Small fires
  • Wildland fires
  • Overhaul
425
Q

Each engine shall be equipped with what for drafting from natural static water source?

A

Barrel style strainer and rope

426
Q

Never add what type of foam to any apparatus foam tank?

427
Q

Tanker shuttle water supply source considerations?

A
  • Closest supply source with each access should be selected
  • Available water
  • Turnaround location
  • Travel distance
  •  The best fill and dump sites are those located so tanker engineers can drive the complete route in a straight line without backing
428
Q

Apparatus cab shall be thoroughly cleaned. Ensure what is accounted for?

A

All map books, reference books, and keys are accounted for

429
Q

Hydrant locations for Duval County can be found where?

Water main locations and sizes can also be found where?

A

On the JAXGIS site :

maps. coj.net/FireHydrantProximity
jaxgis. coj.net/Infrastructure

430
Q

What abnormal motor function condition could result in motor damage?

A

High coolant temperature or low oil pressure

431
Q

To operate the pump efficiently and safely the engineer needs what?

A

A device for setting pressure (the throttle) and co trolling discharge pressure (pressure relief)

432
Q

Running the pump dry for more than how long May cause excessive heat and pump damage?

A

A few minutes

433
Q

What is the volute?

A

The chamber which directs the pressurized water into the discharge manifold

434
Q

To minimize water hammer temporarily reduce RPMs to idle before operating transfer valve. However, do not sacrifice handlines already in use. If unable to lower pressure to idle, what should you do?

A

Reduce discharge pressure a safe amount and operate transfer valve slowly, allowing time for governor to adjust

435
Q

How is the pressure relief valve on the PIV/BIV operated?

436
Q

Bleeding air from intake lines is to critical for what reason?

A

To avoid loss of prime

437
Q

Activating the primer will do what?

A

Will remove air from the pump and allow pressure to increase

438
Q

When is the pump primed?

A

Once air is removed

439
Q

When opening the LDH discharge valve, what may happen?

A

The PDP may drop suddenly

440
Q

How do you use the pressure governor to serve as a high idle control?

A

With the pump disengaged, select RPM mode and press PRESET

441
Q

If water supply runs low, the governor will attempt to maintain PDP how?
If the pump cannot maintain what PSI, what will the governor do?
What is this a safeguard to prevent?

A
  • increasing RPM
  • at least 30 PSI
  • cavitation
442
Q

All gasolines now contain at least 10% ethanol. What is required to achieve proper aeration to extinguish these fires?

A

AR-AFFF and the Akron foam tube

443
Q

What type of foam will store many years without issue?

444
Q

How many onboard twin-cylinder diesel motor generator, kilowatts ?

A

10 kilowatts

445
Q

JFRD tankers have the following features and equipment : (6)

A
  • 2500 or 3000 gallon portable tanker basin with protective tarp
  • 75 gallons or AR-AFFF Class B foam / 10 gallons Class A foam
  • two pre-connected 1-3/4” hoselines and a deck gun
  • two sections of 3” supply hose (preferred over 2-1/2” hose)
  • PIV and LDH discharge valve
  • 10” quick dump valve with directional chute (and rear mounted camera)
446
Q

When residual pressure approaches 0 PSI and the impeller speed remains constant, what happens?

A

The pressure at the eye of the impeller decreases. As this occurs, water temperature will increase at the impeller eye and crest water vapor

Engineer (8 decks)

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