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Engineer Testing Process > IFSTA - Chapter 16 > Flashcards

IFSTA - Chapter 16 Flashcards

1
Q

NFPA 1901

A

Standard for Automotive Fire Apparatus
- All aerial apparatus must meet the design requirements
- Groups aerials into 3 categories:
1. Aerial Ladders
2. Elevating Platform
3. Water towers
PG 542

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2
Q

Aerial Apparatus

A
  • Fire fighting vehicle equipped with a hydraulically operated ladder, elevating platform, or other similar device for the purpose of placing personnel and/or water streams in elevated positions
    PG 543
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3
Q

Aerial Device

A

General term used to describe the hydraulically operated ladder or elevating platform attached to a specially designed fire apparatus
PG 543

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4
Q

Aerial Ladder

A

Power-operated ladder, usually employing hydraulics, that is mounted on a special truck
- Can be either rear or midmounted, or on a tillered trailer
- Fully extended (working) length = 50-137ft

PG 543

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5
Q

Tillered Trailer

A

Trailer equipped with steerable rear wheels
PG 543

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6
Q

Aerial Ladder Truss

A

Assembly of bracing bars or rods in triangular shapes that form a rigid framework for the aerial device
PG 543

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7
Q

NFPA 1901

A

Establishes the number of sections and minimum reach required of an aerial apparatus
PG 543

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8
Q

Bed Section

A

Bottom section of the aerial ladder
PG 544

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9
Q

Fly Section

A

Extendable section of ground extension or aerial ladder
PG 544

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10
Q

Two most common materials for construction of aerial ladders

A

1) Head-treated aluminum alloy
2) Steel
PG 544

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11
Q

Base Rails

A
  • AKA Beams
  • The lower chords of the aerial ladder to which rungs, trusses, and other portions of the ladder are attached
    PG 544
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12
Q

Top Rails

A
  • AKA Handrails
  • The top chords to which the opposite ends of the trussing are attached
    PG 544
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13
Q

Rungs

A

The portions that are attached between the two base rails and are used as steps for personnel on the aerial ladder
PG 544

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14
Q

Stabilizers

A

Device that transfers the center of gravity of an apparatus and prevents it from tipping as the aerial device, hydraulic lifting boom, gin pole, or A-frame is extended away from the centerline as the chassis
- AKA Outrigger
- AKA Stabilizing Jack
PG 546

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15
Q

Four main components of HYDRAULIC SYSTEM

A

1) Actuators = transforms power into mechanical force
2) Hydraulic Fluid = the medium by which the system transmits force
3) Hydraulic Pump = force is created on the fluid by the hydraulic pump; powered by PTO arrangement off the vehicle’s main engine
4) Hydraulic Reservoir = supplies the hydraulic fluid that is move in and out of the system
PG 547-548

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16
Q

Check Valves

A

Prevent fluid from flowing backward through a component and act as a safety feature in the event that a leak develops in the system
PG 549

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17
Q

Relief Valves

A

Limit the pressure built up in the system, thus preventing damage due to overpressurization
PG 549

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18
Q

Counterbalance Valves

A

Prevent unintentional or undesirable motion of the device from its established position
PG 549

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19
Q

Selector Valve

A
  • AKA Transfer or Diverter Valve
  • Three-way valve on aerial apparatus that directs oil to either stabilizer control valves or the aerial device control valves
  • Blocks flow to the system not in use, thus acting as an interlock to prevent the stabilization and aerial device systems from operating at the same time
    PG 549
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20
Q

Stabilizer Cylinders

A
  • Most modern aerial apparatus are equipped with hydraulically operated stabilizers (AKA Outriggers)
  • Each stabilizer is operated by one or two cylinders
  • Cylinders force the stabilizer arms outward and down to take weight off the apparatus suspension and make apparatus more stable
    PG 550
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21
Q

Aerial Device Hoisting Cylinders

A
  • AKA Elevating or Lifting Cylinders
  • Used to lift the aerial device from its bed to a working position
  • End of the piston rod outside the cylinder is fitted with a trunnion that is anchored to the aerial device or the turntable
    PG 550-551
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22
Q

Trunnion

A

In a hydraulic cylinder, the pivoting end of the piston rod that is connected to the anchor ear by the heel pin
PG 551

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23
Q

Normal hydraulic pressure

A

850-3000psi
PG 551

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24
Q

Aerial Device Extension Cylinders

A
  • Dual cylinders fitted on the base section and used to extend the second section of the device
    PG 552
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25
Q

Tillered Trucks

A
  • Tractor Drawn Aerial Apparatus (TDA) = aerial ladder apparatus that consists of a tractor power unit and trailer (tiller) section that contains the aerial ladder, ground ladders, and equipment storage areas
  • The trailer section is steered independently of the tractor by the tiller operator
    PG 553
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26
Q

Elevating Platform Apparatus

A
  • Work platform attached to the end of an articulating or telescoping aerial device
  • Required minimum floor area = 14sq ft
  • Must have rail completely enclosing the floor area with no opening under the railing greater than 24”
  • Requires a KICKPLATE at floor level that is 4” high
  • Must have TWO operator control stations (one at street level and one in the platform)
  • Must have protective water fog curtain nozzle on the bottom of platform (flows at least 75GPM)
  • Minimum load capacity fully extended with dry piping system = 750lbs
  • Minimum load capacity fully extended with charged water = 500lbs
  • Three types:
    1) Aerial Ladder Platforms
    2) Telescoping Aerial Platforms
    3) Articulating Aerial Platforms
    PG 555-558
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27
Q

Aerial Ladder Platforms

A
  • Power operated ladder, usually employing hydraulics, with a passenger-carrying device attached to the end of the ladder
  • Commonly range from 85-110 feet
    PG 558
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28
Q

Telescoping Aerial Platforms

A
  • An elevating platform equipped with piping systems and nozzles for elevated master stream operations
  • Telescoping aerial devices are not meant to be climbed and are equipped with a small ladder that is to be used only for escape from the platform in emergency situations
  • Typically 75-100ft long
    PG 558
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29
Q

Articulating Aerial Platforms

A
  • Aerial device that consists of two or more booms that are attached with hinges and operate in a folding manner
  • A passenger-carrying platform is attached to the working end of the device
  • Similar to telescoping, but the boom sections are connected by a hinge and unfold like an elbow
  • Typically 55-85ft long
    PG 559
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30
Q

Water Towers

A
  • Aerial device primarily intended for deploying an elevated master stream
  • Not generally intended for climbing operations
  • Typically 50-130ft long
  • Maximum flows ranging from 1000-5000 GPM
    PG 560
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31
Q

Quints

A
  • Apparatus that serves as an engine and as a ladder truck
  • Equipped with 5 functions:
    1) fire pump
    2) water tank
    3) ground ladders
    4) hose bed
    5) aerial device
    PG 561
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32
Q

Turntable

A
  • Rotational structural component of the aerial device
  • Primary function is to provide continuous rotation on a horizontal plane
    PG 563
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33
Q

Interlock Device

A
  • A safety device that prevents a component from functioning when another component is functioning
    PG 566
34
Q

Body Collision Interlock

A

The device will not move into regions where it would make contact with the body or cab
PG 566

35
Q

Rotation Interlock (Short Jack)

A

The aerial device will not rotate over the side of the apparatus where the stabilizers are not fully extended
PG 566

36
Q

Maximum Elevation Slow-Down Interlock

A

The device will slow down before reaching maximum elevation or extension
PG 566

37
Q

Retraction Interlock

A

The device will not retract completely without the activation of the retract override function
PG 566

38
Q

Nozzle Stow

A

The device will not drop into the cradle if the master stream nozzle is not properly positioned
PG 566

39
Q

Cab Interlock

A

The cab will not raise if the engine is running
PG 566

40
Q

Tiller Operator Interlock

A

The engine starter will not work unless the tiller operator is seated and belted, or a tiller cab start button is engaged
PG 566

41
Q

Pre-Piped Aerial Ladder Waterways

A
  • Many aerial ladders are equipped with pre-piped waterways that eliminate the need for laying hose up the ladder to a master stream nozzle
  • Two types:
    1) Bed Ladder System
    2) Telescoping Waterway System
    PG 567
42
Q

Detachable Ladder Pipe Systems

A
  • Aerial ladders not equipped with pre-piped waterways have detachable appliances, which include:
    1) ladder pipe
    2) fire hose
    3) hose straps
    4) Siamese appliance
    PG 569
43
Q

NFPA 1989

A

Standard on Breathing Air Quality for Emergency Services Respiratory Protection
PG 573

44
Q

Ground Fault Circuit Interrupter (GFCI)

A
  • Device designed to protect against electrical shock
  • When grounding occurs, the device opens a circuit to shut off the flow of electricity
    PG 575
45
Q

NFPA 1901

A
  • Establishes ladder complements based on how the apparatus will operate
  • Establishes minimum requirements for forcible entry tools
    PG 578
46
Q

Smoke Ejectors

A
  • Exhaust fans
  • Placed in window, door, or roof openings for drawing out heat, smoke, and gases by creating a lower pressure inside the fire building
    PG 579
47
Q

Positive-Pressure Blowers

A
  • Ventilation fans that are used to increase the air pressure in a structure, thus forcing out the by-products of combustion
    PG 579
48
Q

Deadheading

A
  • Operating a hydraulic pump without allowing flow through the system
  • This generates tremendous heat and pressure, and can damage components
    PG 585
49
Q

NFPA 1911

A

Standard for the Inspection, Maintenance, Testing, and Retirement of In-Service Automotive Fire Apparatus
PG 585

50
Q

Nondestructive Testing

A

Method of testing metal objects that does not subject them to stress-related damage
PG 586

51
Q

Which statement best describes the word “truss” as applied to aerial ladders?

A

The arrangement of structural members in a triangular pattern
PG 543

52
Q

An aerial device hydraulic system check valve prevents _______ ?

A

Reverse fluid flow
PG 549

53
Q

What is the function of the selector valve in an aerial device hydraulic system?

A

Prevent simultaneous operation of the aerial device and the stabilizing system
PG 549

54
Q

Most telescoping waterway systems are capable of flows as high as _______ ?

A

1000gpm
PG 568

55
Q

What is the most common type of aerial ladder platform apparatus in service today?

A

Straight Chassis, Rear Mount
PG 558

56
Q

What is the minimum volume that the elevated platform apparatus water system must be capable of discharging in any position?

A

1000GPM
PG 557

57
Q

What does the aerial device hydraulic system counterbalance valve do?

A

Prevents unintended movement of the device from its set position
PG 549

58
Q

What is the maximum horizontal sweep in degrees of a detachable ladder pipe nozzle in either direction from center?

A

15 degrees
PG 569

59
Q

How many basic types of aerial devices are there?

A

3 types
PG 542-543

60
Q

Which device converts hydraulic pressure into mechanical force on an aerial device?

A

Actuator
PG 549

61
Q

What is the most common type of aerial device used in North America?

A

Aerial Ladder
PG 552

62
Q

At minimum non-destructive testing should be performed how often?

A

Every 5 years
PG 586

63
Q

What is the minimum load capacity for a fully extended elevating platform with no water in the pipe?

A

750lbs
PG 557

64
Q

How should an aerial device auxiliary pump be operated?

A

A maximum of one minute of continuous operation followed by a one minute cooling period
PG 550

65
Q

Tiller axle steering wheel free play should not exceed ________ degrees?

A

10 degrees
PG 581

66
Q

What is the maximum length of an aerial ladder?

A

Distance from the ground to the highest rung of the fully elevated and extended ladder
PG 552

67
Q

Aerial device hydraulic hoses must be rated for pressure at least how many times higher than normal operating pressure?

A

4 Times higher
PG 548

68
Q

Why are slides and rollers used on an aerial ladder?

A

Reduce wear between contacting parts
PG 562

69
Q

What type of aerial apparatus is the most similar to an articulating aerial platform?

A

Telescoping aerial platform
PG 559

70
Q

Maximum flow from a detachable ladder pipe system generally does not exceed _______ gpm?

A

750 GPM
PG 569

71
Q

Preventing deadheading is of particular importance during which phase of aerial device inspection?

A

Emergency Power Unit (EPU) operation
PG 585

72
Q

Which statement about a detachable ladder pipe system is correct?

A

Either a smooth bore or fog nozzle can be used with this system
PG 571

73
Q

What is a typical power source for the auxiliary hydraulic pump of an aerial device?

A

The vehicle batteries
PG 550

74
Q

What is an inverter?

A

Step-up voltage transformer
PG 574

75
Q

What is the purpose of the hoisting cylinders?

A

Elevating the aerial device
PG 550

76
Q

What type of pump is the aerial device hydraulic pump?

A

Positive Displacement Pump
PG 547

77
Q

What is maximum normal operating pressure of a hoisting cylinder?

A

3000psi
PG 551

78
Q

For best performance, hydraulic rescue tool hose lengths should not exceed how many feet?

A

100 feet
PG 577

79
Q

When checking the mounted coupling system of a tractor-tiller apparatus, the inspector should pay particular attention to what?

A

Lubrication
PG 581

80
Q

What is the primary power source for the hydraulic pump of an aerial device?

A

A power take off (PTO)
PG 547

Engineer Testing Process (12 decks)

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