TRUCK Numbers

Question 1

It takes ____ joules to raise the temperature of 1 kg of water 1°C.

Answer 1

4186 joules

Page 22

Question 2

1 BTU equals approximately____ joules.

Answer 2

1 Btu= approximately 1100 joules

Page 22

Question 3

The ceiling temperature approaches ____ ° during a rollover and the heat being radiated to the floor may be sufficient to ignite ordinary material such as newspaper.

Answer 3

1100°

Pace 28

Question 4

The heat flux created by a flashover is not survivable for more than a _____ even when wearing full PPE and SCBA.

Answer 4

A few seconds

Page 47

Question 5

And impending collapse indicator is heavy fire with no progress after____ in wood or ordinary construction.

Answer 5

10-12 minutes

Page 70

Question 6

While two firefighters may be sufficient to locate a firefighter in distress, it may take ____or more to affect the rescue.

Answer 6

A dozen or more

Page 80

Question 7

To use their radios, a trapped firefighter may have to alternately turn their PASS devices on and off for ____minute intervals to allow them to hear transmissions from the RIC or emergency traffic.

Answer 7

1 minute intervals

Page 83

Question 8

Crawling along the wall wiping it with one glove hand from the floor to his high as they can reach without standing up should help a lost firefighter quickly locate a window that is within about ___feet of a floor.

Answer 8

4 ft

Page 84

Question 9

Removing the wall between any two adjacent studs will only increase an opening approximately____ inches wide

Answer 9

14 inches

Page 86

Question 10

If the stack material happens to be rolls of newspaper print that can weigh more than ____lbs each, such a collapse could be lethal for firefighters nearby.

Answer 10

2500 lbs

Page 112

Question 11

A building measuring 50 x 100’ with an accumulation of water 6 inches deep requires the structure to support an additional _____of weight.

Answer 11

78 tons

Page 113

Question 12

The ideal climbing angle for ground ladders.

Answer 12

75° from horizontal

Page 125

Question 13

The ladder selected must not only be long enough to reach the objective at a safe climbing angle, but must also extend ____rungs above the parapet or roof eve.

Answer 13

3-5 rungs over

Page 126

Question 14

A pole ladder can be raised perpendicular or parallel with. ___-___firefighters.

Answer 14

5-6 firefighters

Question 15

A minimum of____ firefighters are required to raise a pole ladder.

Answer 15

4 firefighters

Question 16

If the window opening is wide enough to permit the ladder tip to project into it and still allow room to facilitate entry, the ladder can be placed so that it extends ___-___ rungs into the window opening.

Answer 16

2-3 rungs into the window

(Pumping and aerial is different)

Page 135

Question 17

In the absence of aerial devices, ground ladders are the primary means of gaining access to the roof of structures up to _____ stories in height.

Answer 17

4 stories

Page 139

Question 18

When drafting water from a static source such as a pond or lake, it is important to maintain 24 inches between the intake strainer and the bottom of the water source.

Answer 18

24 inches

Page 140

Question 19

When constructing a water chute, roll the edges of the salvage cover over the pike pole toward the middle until there is a____ ft width between the rolls.

Answer 19

3 ft

Page 142

Question 20

If the gap between the buildings is not more than ___ the ladder length, a single ladder can be laid on the roof of one building and the tip simply slid over to the other building.

Answer 20

1/3 the length

Page 142

Question 21

If a firefighter crawling on the floor of a smoke-filled Victorian-style residence can touch the ceiling with a _____there is probably a false ceiling in that room.

Answer 21

6ft pike pole

Page 162

Question 22

Both residential and commercial buildings construction before the middle of the 20th century commonly hadhad ceiling’s with heights of____ or more.

Answer 22

10 foot or more

Page 162

Question 23

LARGE single family dwellings

____-____sqft.

Answer 23

5000-10000 sqft

Page 167

Question 24

Possible BLEVE situation. The DOT-Emergency Response Guidebook recommends pulling back___ in these instances.

Answer 24

1/2 mile

Page 181

Question 25

Fuel oil mechanical atomizer psi.

Answer 25

600-1000 psi Page 184

Question 26

The DOT-ERG recommend staging anywhere from ____-____ away from the source of both LPG and natural gas leaks.

Answer 26

160-330 feet Page 185

Question 27

LEL of natural gas

Answer 27

5% or 50,000 ppm (Recommended 10% perimeter) Page 186

Question 28

LEL of propane

Answer 28

1.5% or 15,000 ppm (Recommended 10% perimeter) Page 186

Question 29

With downed power lines the recommended isolation distance is:

Answer 29

One full span between poles or towers in all directions. Page 193

Question 30

Alternating current detectors capabilities.

Answer 30

15ft normal As little as 1ft in wet soil As much as 500ft with high conductors Page 194

Question 31

A powerline can be reenergized with____ V from a generator.

Answer 31

240 volts Page 195

Question 32

Most masonry walls are about ___ high and roughly ___ thick.

Answer 32

6 ft high 1 ft thick Page 211

Question 33

Scientifically controlled fire test conducted by the NFPA indicate that the TIME AVAILABLE FOR ESCAPE from a burning building can be as little as____ minutes after ignition due to heat buildup in a confined space.

Answer 33

11 minutes Page 219

Question 34

Replace a 12 tooth wood cutting blade when:

Answer 34

2 or more teeth are busted or the tips are worn down Page 221

Question 35

Replace 24 tooth wood cutting blades when:

Answer 35

8 or more teeth are busted or tips are worn. Page 221

Question 36

Replace composite concrete or metal cutting blades when they have been worn down sufficiently for the blade to fit inside a ____ inch circle.

Answer 36

8 inch circle Page 221

Question 37

With a triangle cut the apex of the triangle should be at least ____ high in the middle of the door.

Answer 37

6 feet Page 231

Question 38

If firefighters know that a door has several deadbolts installed, they will also know to cut the door from top to bottom about___ft from the edge of the door handle side.

Answer 38

1ft Page 235

Question 39

The most effective blade for cutting through all types of plastic windows.

Answer 39

40 tooth carbide-tipped Page 240

Question 40

Lite search robes are available in ___lengths at ____ volt AC power.

Answer 40

300 ft lengths 120 volt Page 260

Question 41

Some thermal imager‘s are designed primarily for locating the seat of a fire by being calibrated to respond to temperatures in excess of____ °.

Answer 41

900° Page 261

Question 42

Regardless of the door marking method used, the mark should be placed____of the wall or door so they are more likely to be visible below the smoke later.

Answer 42

Lower 1/3 of the wall/door Page 267

Question 43

Large area search rope: Main Tethers Details

Answer 43

Main- •200ft 3/8in Kevlar rope • 2in steel ring every 20ft •knot I’m after each ring per 20ft ``` Tether- •20ft 1/4in Kevlar rope •3/4in steel ring on one end • knot at midpoint • nonlocking carabiner or snap ring at one end ``` Details- • minimum 3 people •10ft outside the area and 3ft off the ground- search rope is tied to a fixed area with a company identifier. Page 268

Question 44

Depending on the size of the door, telescoping doors can have a space as large as _____ inches between the inner and outer skin.

Answer 44

13 inches (At least 2 inches) Page 324

Question 45

Exterior masonry walls usually range from ___-____inches or more in thickness depending upon the material used.

Answer 45

8-12 inches Page 326

Question 46

Veneer-over-frame walls are essentially frame walls in which____ or ___ wood or metal studs are covered with ply or osb.

Answer 46

2x4 or 2x6 Page 326

Question 47

EIFS veneer may be as much as ___thick.

Answer 47

1ft Page 326

Question 48

PPV blowers are set up _____ft outside the point of entry into the building so the cone of air they create completely covers the opening.

Answer 48

6 feet Page 333

Question 49

When using windows for ventilation, the exit opening should be about ____times as large as the inlet opening.

Answer 49

2x as large Page 332

Question 50

Compared with mechanical smoke ejectors, fog streams are capable of removing ____ times more smoke.

Answer 50

2-4x more Page 336

Question 51

Hydraulic ventilation numbers:

Answer 51

60° pattern 85 to 90% coverage 2 feet inside Page 336

Question 52

Rooftop solar panels electrical power can be as high as:

Answer 52

600 volts DC up to 8 amps Page 347

Question 53

Most rooftop assemblies employee parallel rafter system with rafters spaced from ____-____inches on center.

Answer 53

12-24 inches Page 354

Question 54

It is recommended that a clear space of at least ___ feet be maintained in all directions from anyone using a cutting tool in vertical ventilation.

Answer 54

10 feet Page 355

Question 55

Most common pitch on residential roofs in areas with mild climates.

Answer 55

5/12 pitch Page 361

Question 56

The sawtooth roof consist of a series of small pitched roofs similar in shape to teeth of a saw. The rafters are __x__lumber or larger and use wood or metal supports for bracing.

Answer 56

2x8 inch Page 366

Question 57

Bridge-truss spacing in a roof system may be as much as ___-___ feet on center.

Answer 57

16-20 foot Page 365

Question 58

When vertically ventilating a pitched roof the ventilation exit opening should be at least ____ and in many cases may need to be larger.

Answer 58

4x4 Page 368

Question 59

Flat roofs ordinarily have a slight slope of____pitch or less from the front towards the rear.

Answer 59

2/12 pitch or less Page 368

Question 60

Wooden deck roofs may present a hazard if lightweight plywood or OSB decking is used. Panels of ____-____ inch thickness offer little fire resistance.

Answer 60

3/8- 5/8 inch Page 372

Question 61

Because it is difficult and time-consuming to cut concrete roofs that are more than ___in thick, they are often designed with a built-in access panel.

Answer 61

4 inches Page 374

Question 62

In a poured gypsum roof, gypsum board is placed on the brackets and is covered with a layer of gypsum cement up to____inches thick to which wire mesh reinforcement is added.

Answer 62

2.5 inches thick Page 374

Question 63

Roof monitors can also be used for vertical ventilation. To maximize their effectiveness, at least ____of the monitor housing should be opened or removed.

Answer 63

2 sides Page 379

Question 64

In a Bowstring Truss Roof the top chords of these arches are usually laminated __x__ inch or larger. Purlins are usually __x__ covered by __x__ sheathing

Answer 64

2x12 laminated lumber arch 2x10 purlins 1x6 sheathing Page 380

Question 65

In a Trussless Arch Roof the arches may be spaced between ___and ___ feet apart.

Answer 65

16 and 20 feet Page 382

Question 66

In a Lamellar Arch Roof the framework is usually constructed of dimensional lumber in which __x__ inch wood members are bolted together at the intersections with steel gusset plates.

Answer 66

2x12 inch Page 382

Question 67

When __ - __% of a Lamella roof burns away, sudden failure of the remainder of the roof is likely.

Answer 67

10-20% Page 382

Question 68

In many modern buildings, heavy timber and plank sheathing has given way to laminated beams and __x__inch lumber covered by __inch plywood.

Answer 68

2x4 inch 1/2 inch Page 383

Question 69

Penalized Roof construction: Laminated beams dimensions- __x__in Beam length in excess of ___ft spaced ___-___ ft apart Purlin dimensions- __x__in and __ft centers between beams. Rafters/sub purlins dimensions- __x__in by __ft on __ft centers between purlins

Answer 69

Laminated beams are 6x36in Beam length in excess of 100ft spaced 12-40ft apart Purlins are 4x12in on 8ft centers Rafters/sub purlins are 2x4in by 8ft on 2ft centers between purlins Page 384

Question 70

Comment sheet metal gusset plate prong size.

Answer 70

3/8 inch prongs Page 385

Question 71

Wooden/Metal trusses have web members usually made of ___in cold rolled steel tubing with the end pressed flat. Normal spacing of these trusses is __ feet on center.

Answer 71

1 in 2 ft Page 386

Question 72

Even without the support of interior walls, Pitched Roof Trusses span up to ___feet using __x__ inch components. The most common spacing between these trusses is __-__feet on center, and a __ inch plywood or OSB is commonly used as sheathing.

Answer 72

55 foot spans 2x4 inch components 2-4 foot on center 1/2 inch decking Page 388

Question 73

Wooden I-Beams construction: Web made of solid __x__in ply or osb Chords made of __x__ , __x__ ,or micro-lam Common spacing is __ft on center

Answer 73

Solid 3/8 in web 2x3 or 2x4 in chords 2 ft on center spacing Pages 388/389

Question 74

Shakes and shingles are usually nailed to wooden __x__ inch or __x__inch plank sheathing with a space of about __inch between the planks.

Answer 74

1x4 or 1x6 inch planks 1 inch between planks Page 390

Question 75

Urethane/isocyanate foams are applied to roofs in two forms. One is in the form of __x__foot sheets of foam insulation. The other form is called formed-in-place application.

Answer 75

4x8 foot Page 392

Question 76

Light Gauge Metal/Fiberglass Roof coverings consist of aluminum, fiberglass, or ___-___ gauge steel panels over a wooden or metal structure.

Answer 76

18-20 gauge Page 394

Question 77

Steel Clad Roof construction: 1st type- STRAPS dimensions- __in x __in steel strap grid welded together forming __in gaps in the grid. 2nd type- SHEET dimensions- __x__ sheets of steel from __- __in thick.

Answer 77

1/4 inch x 2 inch strap grid Leaving an 8 inch gap 4x8 sheet 1/8 - 1/4 inch thick Page 395

Question 78

Because a 1/4 inch steel plate weighs___lbs per square foot a 20 x 50’ roof would have a proximately 10,000 pounds added to it.

Answer 78

10lbs per sqft Page 395

Question 79

One 8 x 8‘ ventilation opening is equal in area two ____4 x 4 holes.

Answer 79

4- 4x4 holes Page 400

Question 80

Trench ventilation is accomplished by cutting an opening in the roof, at least __ feet wide, across the entire width of the building.

Answer 80

4 ft Page 404

Question 81

The staging floor in a high-rise fire is located:

Answer 81

2 floors below the fire Page 411

Question 82

A fully equipped firefighter, especially one wearing a full toolbelt and caring spare air tanks, can weigh more than ___pounds

Answer 82

300 lbs Page 411

Question 83

Most PPV blowers position at the street level or effective up to about ___floors.

Answer 83

22 floors Page 414

Question 84

In a high-rise structure, assuming that the structure is closed, with little or no gas being vented to the atmosphere, a neutral pressure plane exist at the level of ambient atmospheric pressure (usually between___and __% of the buildings height).

Answer 84

35-50% of the building height Page 419

Question 85

Draft curtains generally extend a distance equal to at least ___% of the vertical distance from the floor to the roof but no lower than __feet above the floor.

Answer 85

20% 10 ft Page 427

Question 86

Firefighters are____ x more likely to get____ cancer ( 7#) Liver, intestinal, prostate, lymphoma 2 x Malignant melanoma Other skin cancers Testicular Bladder, leukemia Brain Kidney

Answer 86

Liver, intestinal, prostate, lymphoma 2 x Malignant melanoma 2.25 x Other skin cancers 3 x Testicular 2.5x Bladder, leukemia 3 x Brain 3.5 x Kidney 4 x Page 102