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IFSTA Exam Prep > Ch 17. Positioning Ariel Apparatus > Flashcards

Ch 17. Positioning Ariel Apparatus Flashcards

1
Q

When should an aerial apparatus park on the outside of the street giving priority to the Engine Company nearest the building?

A

When the fire building is less than five stories.

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2
Q

When should the aerial apparatus position closer to a building, positioning the engine company on the outside of the street?

A

When the fire building is greater than five stories

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3
Q

When pre-planning for apparatus placement, what should be given special consideration in terms of access?

A

Access to various portions of the occupancy
overhead obstructions
any other factors that may influence the function of the apparatus

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4
Q

Where is the most stable portion of the building when considering a collapse zone?

A

The corner of the building

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5
Q

What three factors should be considered when positioning for the proper distance between the objective and the aerial apparatus?

A

Maximum stability
the best climbing angle
adequate extension

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6
Q

Whenever possible, why should the driver/operator avoid long extensions at low angles?

A

Long extensions at low angles place the maximum amount of stress on the aerial device and in some cases reduce its load carrying capacity

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7
Q

What factors should a driver/operator consider when determining the final location for spotting the Apparatus?

A

Surface conditions
grade
windy conditions
electrical hazards and overhead obstructions
angle and location of aerial device operation
special situations

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8
Q

What is a stabilizer pad?

A

A stabilizer pad is an unattached flat metal plate that is larger in area than the stabilizer foot

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9
Q

What ground surface condition should be the last alternative for spotting in Apparatus?

A

Soft surfaces

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10
Q

Why must parking lot surfaces be considered when identifying parking locations for stabilization of Ariel apparatus?

A

Thin skinned paved surfaces, often in parking lots, may be as dangerous as soft soil. The skin surface may not provide a stable enough base.

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11
Q

What is a vaulted surface?

A

Ground above underground vaults such as underground parking structures, utility chases, dream culverts, basement that extend under sidewalks, or under ground transportation systems

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12
Q

How should the aerial device be operated when conditions are snowy or icy?

A

When snowy or icy the aerial device should be operated in line with the chassis

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13
Q

What is a visual indicator of a compromised asphalt service due to extreme heat?

A

The asphalt bleeds, creating a shiny glass like surface

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14
Q

What are considerations of positioning and Ariel apparatus on a grade with the front of the apparatus facing uphill?

A

The rear tires when stabilized will be off the ground, the truck will have less resistance to sliding downhill.

The rear compartments will be more difficult to reach once the apparatus is leveled.

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15
Q

What are considerations of positioning The aerial apparatus on a grade with the rear of the Apparatus facing uphill?

A

It will be easier to reach the ground with a platform operating off the rear of the apparatus.
It is more likely that the front tires will be lifted off the ground, causing the frame rails to sag and making the device more difficult to stow properly after operations are complete.

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16
Q

What is a dynamic load

A

Loads that involve motion. They include the forces arising from wind, moving vehicles, earthquakes, vibration, or falling objects, as well as the addition of a moving load force to an aerial device or structure. Also known as shock loading

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17
Q

How might moderate to high winds impose a dynamic load on the aerial device?

A

Moderate to Highwinds impose a dynamic load on the area device and may reduce the overall stability by forcing movement for which the apparatus was not designed

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18
Q

How should the apparatus be positioned during high wind conditions?

A

The driver should spot the apparatus in a manner that minimizes the extension needed. The aerial device may also be positioned over the front or rear of the apparatus, preferably parallel to the wind direction.

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19
Q

The apparatus driver should be cautious of Ariel apparatus used around buildings during high wind conditions because they may create what conditions?

A

Wind tunnels

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20
Q

What device should Ariel apparatus carry as a tool to determine electrical output of lines near the worksite?

A

Voltage detectors

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21
Q

Downed power lines can transfer electricity to the ground in what type of pattern?

A

Concentric rings with varying voltage potential

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22
Q

Downed power lines transferring concentric circles with varying voltage potential can be dangerous to the firefighters if they ___________ the bands of differing voltage. 

A

Straddle.

Firefighters should stay away from the vehicle or powerline, keeping both feet on the ground at the same time. This will prevent you from becoming a conductor between two areas of the ground that are charged differently

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23
Q

Are overhead powerlines insulated or non-insulated?

A

Overhead powerlines are not insulated. Some lines have a weather coverings that appear to be insulated but they are not.

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24
Q

How many feet of clearance must remain between the aerial device and overhead high-voltage lines that are energized from 600 to 50,000 V?

A

10 feet

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25
Q

How many feet of clearance must Ariel apparatus maintain between the apparatus and high-voltage transmission lines of over 50,000 V?

A

50 feet

26
Q

What is the new OSHA standard for the distance that the construction industry must maintain between there working apparatus and overhead electrical lines of less than 350 kW?

A

20 feet

27
Q

How should a fire fighter exit an apparatus that has come in contact with powerlines and must be exited?

A

The fire fighter must exit the apparatus by jumping from the apparatus and landing on both feet. Then the fire fighter should hop on both feet to prevent electrical shock away from the apparatus to a distance of up to 150 feet.

28
Q

What instructions should firefighters give to citizens that are trapped inside a vehicle that has come in contact with a power line?

A

The occupants should stay in the vehicle unless there is eminent life threat or if fire is present. Power company personnel must illuminate the hazard by de energizing the line

29
Q

How should an aerial apparatus be operated in relationship to the positioning of the ladder and the chassis in order to provide additional stability?

A

The aerial apparatus is most stable when the area device is in line with the long access of the vehicle.

30
Q

An aerial device operated at a perpendicular angle to the apparatus is the ________ stable position.

A

Least

31
Q

What is the most desirable spotting position to provide the most stability when operating the aerial device off of a rear mount aerial apparatus?

A

It is most desirable to operate the aerial device off the rear of the apparatus by backing the apparatus into the scene when possible.

32
Q

What is the most desirable positioning to provide the most stable platform when operating a mid mount aerial at a fire scene?

A

The most desirable operation to provide the most stability in a mid mount aerial will be to operate the aerial device over the front of the aerial apparatus an in-line with a chassis

33
Q

When jackknifing a tiller aerial apparatus to increase stability what angle provides the most stability?

A

A Tiller jacks knife to an angle of approximately 60° provides excellent stability. Good stability occurs at angles up to 90°.

34
Q

What occurs to stability of the apparatus when a tiller is jackknifed beyond 90°?

A

Stability decreases rapidly when I tell her is jackknifed beyond 90°

35
Q

Stresses to an aerial device may be imposed in both static and dynamic operations. Which of the two tends to create greater stress on the aerial?

A

Greater stresses are when the aerial device is dynamic or in motion

36
Q

What type of stress is created in aerial devices in increases when the ladder rungs are operated non-parallel to the ground or when the apparatus is parked on an incline in the aerial device must operate off the side of the apparatus?

A

Torsional, or twisting stress.

37
Q

 If an aerial apparatus must operate off an incline, how can the driver position to turn table to reduce the torsional stresses?

A

The apparatus driver can reduce the stresses by spotting the turntable downhill from the point of the operation

38
Q

How should the operator spot the aerial apparatus when approaching the Fire building from the uphill side?

A

When approaching from the uphill side, the apparatus should be driven past the fire building in the aerial device should be operated over the rear of the apparatus.

39
Q

How should the operator position the apparatus when approaching a Fire building from the downhill side?

A

When approaching from the downhill side, the apparatus should be stopped short of the fire building in the aerial device should be operated over the front of the apparatus.

40
Q

If an aerial device is designed to be operated in a supported position the ladder should be _________ on a wall.

A

Resting

41
Q

If an area device is designed to be unsupported at the tip, the end of the ladder should be ________ over or just above the window or roofline

A

Cantilevered

42
Q

For aerial devices that are designed to be unsupported, a angle between _______ and ________ degrees provide the maximum loading capacity?

A

70 and 80° from the horizon

43
Q

How should an apparatus approach any scene when possible?

A

Always approach incidents from up wind and uphill when possible. 

44
Q

Place the apparatus in a position that will the _________ the angle and ________ to which the aerial device will be raised.

A

Minimize the angle and extension

45
Q

How should apparatus be positioned in a dead end street if possible?

A

The Apparatus should back in if possible. This will make an escape faster if it becomes necessary.

46
Q

How should an aerial apparatus be positioned if it’s going to be used only in a support role?

A

The aerial apparatus should position in a way that does not block other apparatus that need to be closer to the work area, and close enough so that personnel can carry ground ladders and other portable equipment to the scene if needed.

47
Q

On roadway incidents, how far behind the shielding apparatus should an aerial consider positioning to act as an additional barrier between firefighters in traffic flow?

A

150 to 200 feet

48
Q

When operating near rail roads, how far from the tracks sure the aerial apparatus position when possible?

A

At least 25 feet from the tracks when possible

49
Q

Whenever possible aerial apparatus should position on the same side of the rail tracks as the incident scene. If an aerial must raise the aerial device over railroad tracks what should be confirmed, and how many feet above the rails should the aerial device operate as a safety precaution?

A

Before raising an aerial over railroad tracks, confirm with the railroad company that train traffic has been halted. Additionally keep the area device at least 25 feet above the level of the tracks.

50
Q

How should multiple aerial devices operate on a bridge to minimize exceeding the bridge design limits?

A

Multiple aerial devices should stagger and should not operate on the same span.

51
Q

When operating an aerial device on a bridge, weak spots in the road surface may allow the stabilizers to:

A

Punch through the bridge decking

52
Q

When responding to structure fires what three immediate functions might be required of the aerial Apparatus?

A

Rescue, ventilation, elevated master streams

53
Q

What are five used for signs to identify impending structural collapse?

A

Bulging walls
sagging roofs
large cracks in the interior
falling bricks, blocks, or mortar
interior collapse

54
Q

What are the most common uses of an aerial apparatus on the scene of an aircraft accident?

A

Aerial devices may be primarily used to transport firefighters and equipment as needed to the upper levels.

55
Q

When spotting and Ariel apparatus near the scene of an aircraft accident, placement of the Apparatus must not impede the deployment of what type of aircraft emergency devices?

A

 apparatus must not impedethe deployment of the aircraft emergency slides

56
Q

When operating at a petroleum storage site, the aerial apparatus must ensure that they are not to be spotted inside the ______ which surrounds the tanks.

A

Dike

57
Q

When operating the aerial device to flow foam onto a petroleum tank, in which direction in regards to the wind should the foam be flowed?

A

With the wind

58
Q

Where should the aerial apparatus be positioned at the scene of technical rescue incidents?

A

The apparatus should be positioned in a safe location that maximizes its capabilities. This includes maintaining a distance away from any unstable terrain.

59
Q

When preplanning for the aerial apparatus at target hazard sites, what physical hazard should be given most consideration?

A

Overhead obstructions

60
Q

What type of ground surface may be stable when the incident begins but become unstable as the incident progresses?

A

Frozen ground

61
Q

When an aerial apparatus is leveled on a grade while facing uphill, what might be difficult to access?

A

The rear compartment may be more difficult to reach once the apparatus is leveled because of the increased distance from the ground.

62
Q

What condition might affect the stability of the apparatus on highways and on elevated roadways?

A

Vibrations from moving traffic

IFSTA Exam Prep (20 decks)

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