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FDNY > Taxpayers > Flashcards

Taxpayers Flashcards

1
Q

According to the 1938 building code, how many square feet must an area inside a taxpayer be in order to require automatic sprinklers?

A

Greater than 10,000 square feet.

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2
Q

According to the 1968 building code, how many square feet must an area inside a taxpayer be in order to require automatic sprinklers?

A

Greater than 7,500 square feet.

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3
Q

According to the 2008 building code, when does a taxpayer (full building) require automatic sprinklers?

A
  • area 12,000 feet or greater
  • combined area of 24,000 feet or greater
  • high piled racks of storage
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4
Q

According to the 2008 building code, when does a taxpayer (occupancy within a building)require automatic sprinklers?

A
  • 7,500 feet or greater
  • Area of any size is located three stories above grade
  • Area of any size is located within a high rise
  • Area of any size contains an unenclosed elevator or escalator
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5
Q

Can you get access to the cockloft by removing the cornice in older taxpayers built from the turn of the century to the 1920s?

A

Yes.

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6
Q

Can you get access to the cockloft by removing the cornice in taxpayers built from 1920’s-1960’s?

A

No.

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7
Q

How big can a cockloft be in a Taxpayer?

A

4 inches to more than 6 feet

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8
Q

True or False?

Trusses can be either wood or steel.

A

True.

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9
Q

In what types of occupancies are Bow String Trusses usually found?

A

Older taxpayers such as bowling alleys, supermarkets, auto storage garages, and lumberyards.

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10
Q

What is a physical characteristic that may alert you that a building has a bowstring truss?

A

Hump like roof profile.

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11
Q

Bowstring trusses may only support ____ of the load they were originally designed to hold?

A

40%

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12
Q

Can BWSTRG collapse without a fire?

A

Yes.

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13
Q

Do wood truss roofs sag or become spongy before collapsing?

A

No, wood trusses snap, steel trusses stretch when losing their strength.

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14
Q

How far are older trusses spaced?

A

10-20 feet.

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15
Q

How far do open web steel joists span?

A

Up to 60 feet

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16
Q

Unprotected open web steel are extremely vulnerable to high heat. How fast do they collapse when subjected to high heat?

A

5-10 minutes

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17
Q

True or False?
Fire in the cockloft can cause the collapse of marquees or canopies due to these structures being connected to combustible structures within the cockloft.

A

True.

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18
Q

A 50’ steel beam, heated along its length to 970 degrees will extend approximately ____.

A

4 inches

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19
Q

At 1000 degrees a 100’ long beam will extend approximately ____.

A

9 1/2 inches

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20
Q

At what temperatures do steel “I” beams begin to soften and fail?

A

1000-1500 degrees

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21
Q

True or False?

Heated steel I beams will fail and crack if you cool them.

A

False.
There should be no hesitation in cooling steel i beams, studies have shown that these beams regain their strength when cooled.

22
Q

Cast Iron columns are unpredictable and fail, on average, in about ___.

A

30 minutes

23
Q

Smaller steel I Beams may fail in as little as ____.

A

30 minutes.

24
Q

An uncontrolled fire may reach temperatures of 1000-1500 degrees in as little as ____.

A

5-10 minutes.

25
Q

Do cellars in taxpayers always conform to the store layout.

A

Often cellars DO NOT confirm to the store layout.

26
Q

True or false?

Cellar ceilings in taxpayers are required to be fire retarded.

A

True.

Often times the plaster covering may be deficient.

27
Q

What three basic factor are need for both ordinary combustion and backdraft explosions?

A
  • combustibles
  • oxygen
  • heat
28
Q

What percent of a room must be filled with combustible gasses in order for a room to become explosive?

A

25%

29
Q

What is an effective method of protecting firefighters from the effect of a backdraft?

A

Opening up the roof directly over the fire area, diverting the gasses away from the fire. If a backdraft does occur after the roof has been vented the explosion will be diverted upward, out of the roof opening, away from firefighters.

30
Q

True or False?

Horizontal venting prior to opening the roof may increase the chances of a backdraft?

A

True.

31
Q

True or False?

It may be beneficial to vent the display windows and allow the combustible gases to ignite in taxpayers prior to entry.

A

True.

32
Q

What size should the roof cut in a taxpayer be?

A

8x8

33
Q

What is natural ventilation?

A

Natural ventilation, a result of the openings made in the fire building/area.

34
Q

What is mechanical ventilation?

A

Mechanical ventilation, using fans to further assist the ventilation capabilities of the openings in the fire building/area.

35
Q

The immediate ventilation and cutting of an effective size hole on the roof calls for____ saws and ____ members on the roof.

A

2 saws, four members

36
Q

The need for, and use of, ____ ladder companies at a serious taxpayer fire is not unusual

A

Four ladder companies

37
Q

True or False?

The Roof Sector supervisor can be a Chief or a company officer as directed by the IC.

A

True.

38
Q

True or False?

In Taxpayers a roof usually fails section by section?

A

True.

39
Q

In order to utilize a fog tip to ventilate correctly an engine must stand back _____ feet and open up the fog pattern to the size of the ____.

A

4-5, opening operating thru.

40
Q

Where should the wind be when cutting a hole in the roof?

A

At your back.

41
Q

Which way doe roof joist generally run?

A

Roof joist generally run the short side of the building.

42
Q

When it is not possible to cut an 8x8 hole in the roof of a taxpayer, how big should you make the cut.

A

As big as possible.

43
Q

When necessary to cut a hole in the floor of the first floor of a taxpayer to alleviate smoke from fire in the cellar, where should the hole be placed?

A

As close to the windows as possible and away from doorways and aisles.

44
Q

When extending a vent hole in the floor, how should the additional cuts be made?

A

At a right angles to the floor joist.

45
Q

Can members operate on a Bowstring Truss Roof?

A

No.

46
Q

At vacant buildings with Bowstring Trusses and at buildings where the trusses are involved in the fire the primary tactical consideration should be _______.

A

Exterior Operations.

47
Q

Open web steel joist covered by corrugated steel or Q decking are usually spaced how far apart?

A

4-6 feet

48
Q

Can you cut a open web steel joist roof, a gypsum roof, or a Bowstring Truss roof?

A

No.

49
Q

How can you recognize a gypsum roof?

A

When cutting, a gypsum roof will produce a white powdery substance.

50
Q

When creating a trench cut, the trench should be at least how wide?

A

3 feet

51
Q

How heavy is a gypsum roof?

A

17.5 Lbs per square foot

52
Q

Does the roof supervisor need permission to start a trench cut?

A

No, but an immediate notification to the IC is mandatory.

FDNY (17 decks)

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