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Aarons Drivers Test NUMBERS > S&T Numbers > Flashcards

S&T Numbers Flashcards

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1
Q

The quantity of heat required to change the temperature of 1 g of water by 1°C is ____Joules.

A

4.2 joules

Page 14

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2
Q

A single BTU is the amount of heat required to raise the temperature of ____pound of water by ____°F

A

1 pound

1 degree

Page 14

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3
Q

When comparing Joules and BTUs:

A

1 Btu = 1055 joules

Page 14

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4
Q

CEO combines with hemoglobin about ______times more effectively than oxygen.

A

200x

Pace 20

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5
Q

HCN is_____ times more toxic than CO.

A

35x

Page 21

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6
Q

More than ______ irritants and smoke have been identified including hydrogen chloride, formldehyde, and acrolein.

A

20 irritants

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7
Q

At ambient temperatures (____°), copper will conduct heat more than _____times faster than steel likewise, steel is nearly ____ times as thermally conductive as concrete.

A

68°

7x

40x

Pace 27

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8
Q

One watt is ____ joule per second (j/s).

A

1 watt= 1 joules per second

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9
Q

The prefix kilo indicates a multiple of ____ and mega indicates a multiple of____.

A

1000 - kilowatt=1000 watts

1 million - megawatt= 1 million watts

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10
Q

Liquid fuels that vaporize sufficiently to burn at temperatures under______° present a significant flammability hazard.

A

100°

Pace 34

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11
Q

Pyrolysis of wood begins at temperatures below _____°, which is lower than the temperature required for ignition of the released vapors.

A

400°

Pace 35

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12
Q

At normal ambient temperatures, materials can ignite and burn at oxygen concentrations as low as____%.

A

15%

Pace 38

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13
Q

Oxygen concentrations:

Deficient %___

Enriched %___

Normal air %___

materials can ignite as low as %___

Nomex can burn%____

A

Deficient 19.5%

Enriched 23.5%

Normal air 21%

materials can ignite as low as 15%

Nomex can burn 31%

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14
Q

A visual indicator that a fire is leaving the incipient stage is flame height. When flames reach ____ high, radiant heat begins to transfer more heat than convection

A

2.5 ft

Page 43

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15
Q

As flashover occurs, the gas temperatures in the room reach____ or higher.

A

1100°

Page 51

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16
Q

The auto ignition temperature of CO, the most abundant fuel gas created in most fires, is approximately____ °.

A

1100°

Pace 52

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17
Q

SCBA face piece begin to fail after 5 minutes of exposure to a heat flux of___.

A

15 kW/m squared

Pace 52

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18
Q

Over the past 50 years, building construction in North America has changed drastically. In single-family residential structures, the square footage of houses has increased over____% between ____and ____.

A

150%

1973 and 2008

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19
Q

Unprotected engineered steel and wood trust can fail after ____minutes of exposure to fire. These trusses can fail from exposure to heat alone without flame contact. For steel trusses,____° is the
CRITICAL TEMPERATURE OF STEEL- the temperature at which steel begins the weaken.

A

5-10 min

1000°

Page 73

20
Q

Before____, the bowstring truss roof design was one of the most common design types for large commercial and industrial structures.

A

yr 1960

Page 74

21
Q

_____ with solid walls should have at least 2 opposite sides hinged at the bottom and held closed at the top with a fusible link that allows gravity to open them in case of a fire.

A

Monitors

Page 94

22
Q

Type lV construction is often referred to as heavy timber construction. This construction type uses large dimensional lumber( greater than ___”) for all structural elements.

A

4 in

Page 106

23
Q

Wood I-joist web was originally___-___inch plywood; in recent years OSB or a similar thickness has become more common.

A

3/8- 7/16 in

Page 108

24
Q

____ inch gypsum board or equivalent protection is to be provided on the underside of floor framing members that are less than_____ nominal or large framing members.

A

1/2 in gypsum

2x10 nominal framing

Page 108

25
Q

Modular homes comprise only about ____% of all factory build housing.

A

6%

Page 110

26
Q

In panelized factory built homes, the individual panels are typically ___feet wide up to ___ feet long.

A

8 ft wide x 40 ft long

Page 110

27
Q

The spaces that the open floor plan creates may have high, multistory ceilings, such a “big box” retail stores, or ceilings that are ____-____ feet, such as those found in office spaces on a single floor of a high-rise structure.

A

8-10 ft

Page 112

28
Q

Open floor plan offices may be subdivided into individual work spaces that are ____-___feet high partitions.

A

4-6 ft high partitions

Page 112

29
Q

The ceiling above the basement is generally exposed and ceiling height is approximately ____feet high, allowing the fire to rapidly spread upward.

A

8 ft

Page 114

30
Q

A cockloft is a space ___-___feet in height that is found over commercial building spaces.

A

2-3 ft

Page 116

31
Q

Type ll construction consist of unprotected steel or non-combustible supports, such as I-beams. When exposed to temperatures above_____° unprotected steel will expand and twist, pushing out walls, and when cool will slightly constrict.

A

1000°

Pace 119

32
Q

Master streams and apparatus can be located in the area that a_____° arc forms from the wall intersection.

A

90°

Pace 120

33
Q

Every US gallon of water that is used to suppress the fire adds ____pounds of weight to the floor that may already be weakened.

A

8.33

Page 121

34
Q

And effective span of control ranges from ____-____subordinates per supervisor, depending on the variables, with____ considered the optimum number.

A

3-7

5 optimal

Pace 150

35
Q

The environment within a modern structure fire can quickly exceed___° with a potential for flashover (approximately____°) to occur within minutes.

A

500°

Approximately 1110°

Pace 181

36
Q

International Association of Fire Chiefs (IAFC) released its initial draft of “Rules of Engagement for Structure Fire Fighting” in what year?

A

yr 2010

Page 184

37
Q

Studies of human behavioral patterns indicate that most people will exit through the door they entered. However, building codes only require it to handle____ % of the occupant load to exit through that opening.

A

50%

Page 192

38
Q

A firefighter should rehab after using___ air cylinders.

A

2 cylinders

Page 193

39
Q

And assembly occupancy is defined as a building or structure, or any portion thereof, that is used for the gathering of ____ or more persons.

A

50 people or more

Page 197

40
Q

According to the NFPA, more than____ fires occur annually in vacant structures. At the same time, the NFPA estimates that more than ___ civilians die and___ firefighters are injured every year in these types of fires.

A

11000 fires

20 civilian deaths

6000 firefighter injuries

Page 198

41
Q

A PAR should be taken on the scene every____-____ minutes.

A

10-20 minutes

Page 216

42
Q

Positive Pressure Attack is only an effective tactic if the location of the fire is known and the appropriate exhaust intake ratio( greater than ___) can be achieved.

A

Greater than 1

Page 246

43
Q

The International Agency for Research on Cancer (IARC) identified more than ____ carcinogens in fire smoke.

A

30 carcinogens

Page 250

44
Q

In single-family residential structures, the footprint of houses has increased over 150% between 1973-2008. At the same time, the lot sizes have shrunk approximately____%, reducing firefighter access and increasing potential exposure risk.

A

25%

Page 256

45
Q

The personnel required for search and rescue and fire fighting operations in high-rise buildings is often___-___ times as great as required for a fire in a typical lowrise building.

A

4-6x greater

Page 269

46
Q

Wind driven conditions can occur in any type of structure. Wind speeds as low as ___mph can create wind driven fire conditions.

A

10 mph

Page 62

Aarons Drivers Test NUMBERS (4 decks)

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