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Truck company Operations > 1 > Flashcards

1 Flashcards

1
Q

What is the most common type of aerial apparatus used in the fire service?

A

Rear-mounted aerial devices

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2
Q

What is some pros/cons of mid mount aerial devices?

A

Positional versatility, greater stability, but they have a reduced scrub area, less compartment space, and a larger turning radius and kick out

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3
Q

What is some pros/cons of tractor drawn aerials(tillers)

A

Greatest positional maneuverability, but they are often the most expensive aerial device type and require two trained driver operators

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4
Q

In what ways do peaked roof react to being burnt?

A

They tend to burn away rather than collapse into the building.

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5
Q

Type 3 construction roofs are typically constructed with?

A

Dimensional lumber. It has moderate resistance to failure under fire conditions.

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6
Q

When one component fails in a truss, what happens?

A

It can lead to a chain reaction of failures throughout the system. Potentially causing the entire structure to collapse

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7
Q

Around what time did the trend for using wood trusses and engineered wood products, such as laminated veneer lumber and I joist begin?

A

Since the late 1960s

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8
Q

What should Firefighters attempt to do when working under lightweight roof construction?

A

Attempt to operate in smaller compartments to avoid the hazard of concentrated load falling on them if the roof fails.

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9
Q

What are the two primary methods that gable roofs are constructed?

A

Ridgepole and rafters, and trusses

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10
Q

During what timeframe construction is the ridgepole and rafters construction often occurring?

A

Prior to the 1980s

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11
Q

Rafters and trusses are put on what inch centers?

A

16-24in

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12
Q

What is a cross gable?

A

An aesthetic feature to the structure, but they also increase the dead load on the roof. Under fire conditions, cross-gable roof sections are known to collapse

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13
Q

What must firefighters be aware of when working near cross gable roof sections?

A

When the larger supporting roof burns away, the cross-gable section often collapses into the top floor

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14
Q

What is another name for a barn roof?

A

Gambrel

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15
Q

What is the main difference between a hip roof and gable roof?

A

A hip roof all exterior walls are bearing

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16
Q

What type of roof is generally well constructed and pose less of a collapse risk than other roof types?

A

Sawtooth roof

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17
Q

What is good for firefighters to know if they recognize the roof is a one piece laminated arch?

A

When the arch loses its structural integrity, it tends to kick out at the base and collapse violently into the structure without warning. Therefore firefighters should work independently from the roof on an aerial or tower bucket due to this.

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18
Q

Under fire conditions which is subject to failure faster multiple-section laminated arches, or one-piece laminated arch?

A

Multiple-section laminated arches

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19
Q

What is also true for the multiple-section laminated arches as the one-piece arch?

A

They both kick out at the base and collapse violently into the structure without warning.

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20
Q

Trusses arch roof construction is commonly seen in commercial buildings built in the?

A

1930s, 1940s and 1950s

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21
Q

How susceptible to collapse is the Wooden trussed arch roof ?

A

Highly susceptible to collapse when directly exposed to fire. Crews should not operate on top of or below this roof when it is compromised.

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22
Q

Bowstring truss roof has what components?

A

Turnbuckle, steel cable, and steel plates

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23
Q

What is a way to identify a bowstring truss roof?

A

Outside plates with tie rods passing thru the exterior walls. Inside a steel cable and turnbuckle support the roof by providing lateral support for the buildings walls

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24
Q

What fails early in a bowstring truss roof?

A

Tie rods and turnbuckles when exposed to high heat. The steel cable that hold the walls in place can fail causing the walls and roof to violently collapse.

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25
Q

Conventional wood flat roofs are known to?

A

Burn out from underneath without showing visible signs of weakness on top, making the roof unstable and hazardous for rooftop operations

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26
Q

Open-web metal-bar joist are preferred in construction because?

A

They are incredibly strong and can span great distances without the need for intermediate supports

27
Q

What are some signs of impending failure on open-web metal-bar joists?

A

Hot bubbling melted tar, white smoke coming from the deck, and a soft feeling underfoot. Firefighters should note these and not work on hot, slippery tar directly over the fire.

28
Q

What type of roofing material is typically used on a bridge truss roof?

A

Metal, such as corrugated steel or a flat roofing membrane. They are often treated with a fire-resistant coating to improve their fire resistance.

29
Q

What should personnel do if they see pvc discharging from the saw when cutting a post tension concrete roof?

A

Stop cutting and inspect the area for cables. Cables may be encased in polyvinyl chloride PVC or other materials.

30
Q

What is an inverted roof?

A

A type of flat roof where the insulation is placed on top of the waterproofing layer rather than underneath it. This means that the waterproofing layer is located at the bottom of the roof assembly, with the insulation and other layers stacked on top of it.

31
Q

What type of roofs typically have a layer of rocks holding the insulation in place, and are inherently spongy, giving firefighters a false reading of conditions below.

A

Inverted roof

32
Q

What is a rain roof?

A

A second roof layer over the existing roof, the purpose is to protect the building from leaks or other damage in the original roof. It can be flat or gabled.

33
Q

What can help aid firefighters in knowing the height of facades on buildings?

A

Locating scuppers at or below the roofline

34
Q

What may firefighters have to do to gain access to the roof on buildings with facades?

A

Access the roof via the rear of the building or use ladders to reach the top of the facade.

35
Q

Engineered wood products such as trusses and plywood I beams fail more quickly than sawn lumber due to?

A

Lower mass

36
Q

What was the time difference between engineered floor joist and traditional lumber joists?

A

6mins for engineered floor joists
16 mins for traditional lumber joists

37
Q

What is the name for the type of roof that is covered with vegetation and soil, providing a natural layer of insulation and helping reduce the urban heat island effect.

A

Green roofs also known as living roofs

38
Q

What is a consideration to be made if you need vertical ventilation on a structure with a green roof or living roofs

A

Personnel may need to remove a significant amount of soil to reach the roofing materials. This process can be time consuming and may not be practical in some situations

39
Q

What is good to think about in regards to windows in green buildings?

A

Thicker and stronger glass, which may be difficult to break in emergency situations. These windows may take longer to fail in fire conditions, which can mask fire conditions inside and prevent the release of heat and smoke in the building. This can lead to ventilation- limited fires that are more difficult to control and extinguish

40
Q

What is a warning that the fire may be reaching the point of flashover?

A

Rollover
Flashover occurs between a fire growths and fully developed stages

41
Q

What is the difference between modern and legacy materials?

A

Modern is man made materials such as plastics, synthetics, polyurethane, and polyester.
Legacy is referred to as “traditional” consist of natural materials, such as cotton, wicker, solid wood, and dimensional lumber

42
Q

What does HRR stand for

A

Heat release rate

43
Q

What does RECEO-VS stand for?

A

Rescue, exposure, confinement, extinguishment, overhaul, ventilation, and salvage

44
Q

What does the acronym SLICERS stand for?

A

Size-up, locate the fire, identify the flow path, cool from a safe distance, extinguish the fire, rescue, and salvage and overhaul

45
Q

When deciding where to position the apparatus, the officer and driver must consider a range of variables including?

A

Incident priorities, occupancy type, and arrival sequence. Other factors on pg 42 of truck book

46
Q

What is the most critical factor in positioning the truck?

A

Determining the intended target or task. And then spotting the turntable accordingly

47
Q

Where should the first due and then second due truck position?

A

1st due truck should aim to position on side A or the address side of the building. Meanwhile the 2nd due truck should position on the opposite side whenever possible.

48
Q

If the second due truck must position near the first due truck on the same side of the structure, what is the most ideal?

A

Ideally front bumper to front bumper
This allows best portable ladder access from both trucks and represents the best strategic location, which will also guide the placement of the second-arriving truck.

49
Q

When obstacles make it impossible to access the rear of a building where should the truck company aim to position?

A

Truck company should aim to position in a location that reduces the distance required to carry portable ladders and equipment for operations on the structures rear or sides. If there is limited or restricted access to the sides of the structure, the truck company should position at the best location available and communicate that position to command

50
Q

When a specific target has been identified for placement of the aerial ladder or platform, the driver should position the turntable where?

A

In line with the target

51
Q

One important consideration when positioning the turntable involves observing smoke conditions and direction and positioning the turntable?

A

Slightly upwind to reduce the risk of exposure to toxic gases and hazardous materials

52
Q

When multiple locations are identified the driver must position the turntable?

A

Where it can reach as many of the locations as possible.

53
Q

In rushed situations with multiple priorities, positioning decisions should prioritize?

A

Life safety of civilians and fire department personnel

54
Q

In an ideal scenario involving a tower personnel should be able to do what with their bucket?

A

Place their bucket on the ground or below in front of the fire building

55
Q

If a tiller truck must block the entire roadway, personnel should do what?

A

Communicate this action over the radio so other responding units can adjust before they arrive

56
Q

Personnel must exercise caution when operating around energized wires. This includes maintaining a minimum distance of _ at all times regardless of the circumstances?

A

10 feet

57
Q

Lateral grades of up to what percent can be corrected using the stabilizers?

A

5-6%

58
Q

Truck company with the outrigger deployed can concentrate a weight of more than 40,000 lb on the spot where the outrigger contacts the roadway, exceeding 400lbs per sq in. The usage of a jack plate can decrease the weight to?

A

25,000lb or less than 35lb per sq in

59
Q

Pg 52 chart of aerial apparatus on uneven terrain slope %

A
60
Q

Where should the first due truck park on a high rise fire?

A

Side A unless fire location can be readily identified. Once fire location is determined and if it’s accessible the truck should move to the fire side of the building

61
Q

What are the 3 types of utilities commonly needed to be controlled during structure fires?

A

Water,gas, and electric

62
Q

Personnel should confirm what before starting overhaul?

A

That utilities are secured.

63
Q

What is the name for concrete pads or areas designed for fire department vehicle access. Compact soil and tile blocks lie beneath hidden grass.

A

Ground reinforcements

64
Q

What is the name for concrete pads or areas designed for fire department vehicle access. Compact soil and tile blocks lie beneath hidden grass.

A

Ground reinforcements

Truck company Operations (1 decks)

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