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Fire officer handbook of Tactics 4th > Size-up > Flashcards

Flashcards in Size-up Deck (25)
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"What is size-up?

Size up is a continuing evaluation of all the problems and conditions that affect the outcome of the fire.


'''Who performs size-up'!

Size-up should be performed by all members, to varying degrees.


When should size-up be performed?

Size-up should be begun upon the receipt of the alarm and continue until the incident has been controlled.


Given the following alert message, what element of the size-up can you ascertain? **Attention, Engines 1, 2, and 3; Ladder 1; Chief 1: Respond to a house fire at 158 V? Main Street. Fire reported on the third floor. The time is 1430 hours.’

Three engines, one ladder, and one chief have been assigned.


In your community, on which side of the street would the even-numbered homes be found? Select only one choice.

on the east side on a north-south street


A rule of thumb for collapse anticipation in ordinary construction or wood-frame buildings is that if fire has heavily involved an area for ___ minutes, fire forces should be withdrawn.

20 minutes


What are the main elements of the traditional 13-point or COAL WAS WEALTH size-up?

C-construction , O- occupancy, A- apparatus and personnel, L- life hazard, W- water supply, A-auxiliary appliances , S- street conditions, W- weather, E- exposures, A- area, L- location and extent of fire, T- time, H- height


modernization of the traditional 13-point size-up would combine.___ and _____, and add ______to the listing.

area, height, hazardous materials


What is the best method of reducing the life hazard before the fire?

installing a wet pipe sprinkler system


Knowing the type of occupancy involved can tell an officer much about a given incident. Name five key variables strongly tied to occupancy.

1. potential life hazard
2. presence of large, open floor spaces or small rooms
3. presence of hazardous materials
4. degree of fire loading
5, possible presence of truss construction (large, open floor areas)


Statistics have shown that the greatest civilian life hazard occurs in which occupancy?



As far as construction affects the size-up, a fire involving a newer metal deck roof generally ______ the fire load.



Which class of construction is most resistant to collapse caused by fire?

older type Class 1


What factors make the 20-minute rule of thumb for predicting collapse less than scientific?

unknown length of burn
potential use of accelerants
possibility of the presence of lightweight construction


Three unusual circumstances may confuse your size-up of the height and area of the building. What are they?

buildings built on grade, wrap-around buildings, and interconnected buildings


All but one of the following choices represents special firefighting problems due to their location. Which choice does not belong?

fire on the second floor of a 12-story high-rise hotel


What three factors concerning smoke should be prime elements of a size-up?

location, color, movement


A firefighter who needed to report fire extending into the attached row house marked with an X should report that she is in which building?
I x I I I fire I I I

exposure 2B


- Which of the following most correctly lists the minimum required fire flow for each occupancy below, expressed in gpm per 100 sq ft, in a modern, non-vented fire situation?

private home: 15, stationery store: 35, mattress factory: 60 (gpm/ 100 sq ft)


Which of the following is not a type of auxiliary appliance?

Dry chemical fire extinguisher


Complete the following descriptions of the effects that weather can have on firefighting.

-high heat and humidity rapidly fatigue Firefighters
-Below freezing temperatures result in Slow operations and cause mechanical failure
-High winds can drive attack crews off of a floor or force fire past defensive measures.


the event a department encounters a sewer trench in the fire block between the roadway and the fire building, the __ should enter the block while the _____remains out at the intersecting street.

aerial device, pumper


On a hot, humid day, you are the incident commander at a fire in a two-story Class 5 frame house with a cellar. Your first attack hoseline has entered the structure and has knocked down a lot of fire. The crew returns to the street with their air cylinders depleted, and the officer approaches to inform you that the main body of the fire has been knocked down, but there is still debris smoking that needs overhauling. You consult your dispatcher and find that you are 20 minutes into the alarm. What is the most correct order to issue?

Have a fresh unit enter the structure to complete the overhaul.


All of the following are advantages of the time mark system except for which choice?
A. It avoids tunnel vision.
B. It refocuses the IC’s attention on the elapsed time of burn.
C. It forces the IC to evaluate what progress is being made.
D. It determines whether a life hazard is present.

D. It determines whether a life hazard is present.


Which of the following factors is responsible for the destruction of more buildings than any other construction impact
A. the degree of compartmentation
B. the degree the building contributes to the fire load
C. presence of hidden voids
D. the ability to resist collapse

C. presence of hidden voids