Hoseline selection, Stretching, and Placement Flashcards Preview

Fire officer handbook of Tactics 4th > Hoseline selection, Stretching, and Placement > Flashcards

Flashcards in Hoseline selection, Stretching, and Placement Deck (25)
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1

, Four main factors affect the selection and placement of a hoseline. Which is incorrectly stated?
A. occupancy
B. street frontage
C. construction
D. location and extent of the fire

B. street frontage

2

With the new 1 3/4 or 2-in. hose and automatic nozzles, we can maintain the same flow as with a 2%-in. line.” This statement is:
A. correct as written
B. correct, if the nozzle pressures are equal
C. incorrect, if the nozzle pressures are equal
D. incorrect, if a proper size nozzle is used on the 2lA-in. line

D. incorrect, if a proper size nozzle is used on the 2%-in. line

3

Compared with a smaller line, a larger hoseline exhibits all but one of following characteristics. Which one is not an attribute of a larger diameter line?
A. has greater flow potential
B. has greater flexibility
C. has greater reach and stream impact
D. puts out fire and cools well ahead of members

B, has greater flexibility

4

Residential occupancies have several characteristics that affect hoseline selection. Which of the following is not one of them?
A. time of day
B. need for speed
C. low fire loading
D. presence of dividing walls or partitions

A. time of day

5

All of the following areas present similar degrees of compartmentation and light fire loading except which choice?
A. a high school Classroom
B. A junior high storage area
C. a fireproof hotel
D. a hospital patient care area

B. a junior high storage area

6

What factors determine the required diameter of the attack line?
1. occupancy
2. area of the building (potential fire area)
3. size of the fire
4. time of day

C. 1,2, and 3 only

7

What factors determine the required length of the attack line?
1. setback from the street
2. height and area of the building
3. presence or absence of an open stairwell
4. presence or absence of a standpipe system
5. occupancy

B. 1,2,3, and 4 only

8

How much hose should be stretched for a fire on the top floor of a three-story factory building, 200 ft long x 200 ft wide (not tall), with the hydrant 100 ft from the front entrance?
A. 500 ft of 13/4-in.hose
B. 500 ft of 2 1/2-in.hose
C. 600 ft of 2 1/2in. hose
D. 900 ft of 2 1/2-in. hose

C 600 ft of 2 1/2 -in. hose

9

Firefighters stretching to a fire on the fifth floor via a wide, open stairwell in an old apartment house should ensure that at least how many lengths of hose are present inside the building? (Assume the stairway to be right at the front door.)
A. Two
B. four
C. five
D. six

A. Two

10

C. Stretching hose via a rope on the outside of the building has all of the following advantages over stretching around a staircase except for which of the following?
A. It is faster.
B. It allows the members on the first line to attack from the fire escape with the wind at their backs.
C. It requires fewer members to accomplish.
D. It provides a ready means to stretch additional lines.

B. It allows the members on the first line to attack from the fire escape with the wind at their backs.

11

The degree of danger to a brick or concrete building from an exposure fire depends on:
1. the number and size of windows
2. the fire resistance rating of the walls
3. the proximity to the fire building
4. the response of an adequate number of fire department ladder companies

A. 1 and 3 only

12

What provides the greatest protection against radiant heat?
A. water curtains
B. distance
C. combustible construction
D. light-colored or reflective paints

B. distance

13

Which is not one of the main functions of a nozzle?
A. to control the flow of water
B. to increase the velocity of the water
C. to divide the stream into fine droplets
D. to give the stream its shape

c. to divide the stream into fine droplets

14

For maximum effectiveness, the discharge opening of a nozzle should not exceed what percentage of the supply diameter?
A. 25%
B. 50%
c. 75%
D. 100%

B. 50%

15

The disadvantages of using a cellar pipe on a severe cellar fire include all but which choice?
A. It requires constant staffing to operate.
B. Operation area maybe untenable.
C. It only applies water in one or two directions at a time.
D, It has a limited reach of stream, only 15—20 ft.

D. It has a limited reach of stream, only 15-20 ft.

16

All of the following are prerequisites for high-expansion foam to successfully darken down a fire. Which choice is not correct?
A. The floor above the fire must remain tenable.
B. Sufficient volume of foam per minute must be applied.
C. Foam must be able to reach the seat of the fire.
D. The fire must involve Class A materials.

D. The fire must involve Class A materials.

17

, The bent applicator pipe in useful for discharging all but which agent?
A, dry chemical
B. water
C. aqueous film-forming foam
D. Fluoroprotein foam

D. Fluoroprotein foam

18

8. Members entering a high-expansion foam blanket should know that all of the following are true except for one choice. Which is incorrect?
A. The entry should only be made for lifesaving purposes.
B. All members shall be properly equipped.
C. Electrical supply to the area should be shut off.
D. A rapid intervention team must be in place at the point of entry.

A The entry should only be made for lifesaving purposes.

19

Most fires in residential occupancies are best handled with a midsized handline. Which statement below does not properly state a reason why this is true?
A. Residences are generally more confined than stores,
B. Residences have relatively light fire loads.
C. Residences are all single-story fires.
D. Residential life hazards demand speed of water application and a rapid advance,

C. Residences are all single-story fires

20

Most fires in commercial occupancies should be fought with 2*/2-in. hose. Which statement below properly states a reason why this is true?
A. The fire loading is heavier in commercial buildings than in factories.
B. The size of the fire in a commercial building is more readily determined than in a house fire.
C. The floor areas demand a longer-reaching, harder-hitting stream.
D. Often there are less flammable materials around that can accelerate a minor fire.

C. The floor areas demand a longer-reaching, harder-hitting stream.

21

An advantage of 2 1/2-in. hose over smaller diameter lines is correctly stated in which choice?
A. A larger flowing line has more reach than a smaller line at the same pressure.
B. A larger flowing line has greater penetration than a smaller line at any pressure.
C. A larger line takes the same number of personnel to hold as a smaller line.
D. A larger line takes four people to hold.

A. A larger flowing line has more reach than a smaller line at the same pressure.

22

A fully involved commercial occupancy 20 ft wide x 50 ft deep, common to many smaller strip malls, would require approximately how much flow to ensure rapid knockdown and extinguishment?
A. 100 gpm
B. 200 gpm
C. 350 gpm
D. 500 gpm

C. 350 gpm

23

Stretching a hoseline to the correct location is easier said than done. Which of the following statements regarding hoseline stretching would be most correct?
A. Be sure an uncharged hoseline does not run under any doors. Use a rug or a welcome mat to chock doors close
B. After the nozzle operator has removed the working length, he should step off two or three paces and let the backup person remove the remainder of the hose.
C. The backup person should bring as much spare hose as possible into the fire building where it will be ready to advance
D. If the nozzle team encounters a narrow stairwell, they should stretch the hose up the well to minimize the number of lengths required to reach upper floors,

B. After the nozzle operator has removed the working length, he should step off two or three paces and let the backup person remove the remainder of the hose.

24

senior firefighter in an engine company relayed her years of experience to a newer member. She made the following statements regarding hose stretching to upper floors. She was correct in all but which choice?
A. If a wide stairwell is encountered, it is best to stretch the line in the stairwell. The presence of such a well must be relayed to those stretching the hose to avoid stretching too much hose.
B. When stretching up a stairwell, do not stretch more than two lines in the well to avoid them getting tangled.
C. When stretching to upper floors via a wide well, one length of hose will usually reach to the fifth floor. The length must be supported just above the coupling with a rope or hose strap.
D. If an elevator is installed in the well, it is best to use a rope to haul the line up the outside of the building if the fire is above the third floor,

C. When stretching to upper floors via a wide well, one length of hose will usually reach to the fifth floor. The length must be supported just above the coupling with a rope or hose strap.

25

Evaluate the following statements made about alternate approaches for stretching hoselines and select the most correct.
A. When stretching lines up the exterior, several methods are possible. All should focus on bringing the line into the building directly on the fire floor for speed.
B. If a line is to be stretched up a fire escape, it must be carefully coordinated with inside members to avoid opposing hose streams.
C. Stretching a line up an aerial or platform can speed operations, and is especially useful for attack if there is a gated outlet on the platform or if a line can be connected directly to a ladder pipe.
D. If a rope is used to haul a line up the outside, avoid stretching more than one line this way so they will not become entangled.

B. If a line is to be stretched up a fire escape, it must be carefully coordinated with inside members to avoid opposing hose streams.