Ch. 2 Size-Up

Question 1

2 forms of Life Hazard

Answer 1

Them and us

Question 2

4 ways CADS data transmitted to field (about occupancies)

Answer 2

Dispatcher reads it as part of alert message
Flash the message on video display
Teletype it to each unit
Have message repeated over radio 1 minute after initial alarm

• 3 & 4 best possible choices *

Question 3

Time has many impacts. Name 3.

Answer 3

Time of day
Time of year - effect of holiday season
Elapsed time since fire has begun - elapsed burn time=key indicator of likelihood of structural collapse

Question 4

What produces life hazard (mathematical style formula)

Answer 4

Time of day + occupancy + location/extent of fire = life hazard

Question 5

Estimating time after flashover (for start of 20 min. rule for class 3 and 5 ordinary construction) using view venting through window

1. Not vented from a single window
2. Not vented or only vented from 1 or 2 windows
3. Venting from Windows on 2 FLOORS

Answer 5

1. Under a minute or two
2. Anywhere from 1 to 5 minutes
3. Greater than 10 minutes OR
   Use of an accelerant

Question 6

The most important decision you will make as IC?

Answer 6

Order out interior crews

Question 7

Construction has 5 implications/concerns

Answer 7

First, compartmentation
Second, building itself contributes to fire load
Third, number of hidden voids - responsible for destruction more than any other
Fourth, ability of building to resist collapse - most important to firefighters
Finally, water added and point of overload for materials

Question 8

NFPA 220 uses type of construction with _____________ and _________ to describe the required fire resistance rating for select structural elements.

Answer 8

Roman numeral designation, Arabic numeral subsets (RA)

Question 9

5 classes of construction (H.O.T.)

Answer 9

Class 1 - Fire resistive (fireproof)
Class 2 - Noncombustible
Class 3 - Ordinary Construction
Class 4 - Heavy Timber
Class 5 - Wood frame

Question 10

Buildings OVER ____ stories or ______ feet must be built of Class 1 construction.

Answer 10

6 stories, 75 feet

Question 11

Frontage of a building is important because: (3)

Answer 11

Attack begins in the front.
Provides opportunities for horizontal ventilation.
Frontage indicates Width and Depth of the structure (not always the case).

Question 12

The ______ the fire is in a building, the _______ the hazard.

Answer 12

lower, more serious

Question 13

Fires below grade are especially problematic because: (2)

Answer 13

Lack of opportunities for horizontal ventilation. Entire operation, from entry through attack and even relief, must be performed in this atmosphere, limiting members work time.

Question 14

Size-up 13-point outline

Answer 14

COAL WAS WEALTH.
Construction
Occupancy
Apparatus/personnel
Life hazard 
Water supply
Auxiliary appliances
Street conditions
Weather
Exposures
Area + height
Location/extent
Time
Hazmat

Question 15

Three locations that create “special” firefighting problems:

Answer 15

Top floor of most ordinary brick and wood.
Below grade.
Any place where fire is above the reach of ladders for exterior vent and access.

Question 16

Determining the extent of fire: Items to evaluate quickly are:

Answer 16

Location of smoke and flame.

Color and movement of smoke.

Question 17

If all floors above are pushing heavy smoke with no visible fire, expect it to be in the _______.

Answer 17

Cellar

Question 18

What is the 20-minute rule or air bottle rule?

Answer 18

For class 3 and 5, aggressive attack until first due units deplete their bottles

Question 19

Reports from IC when a change in the incident is good for:

Answer 19

Allow superior officers to monitor conditions in their office.
Units responding to multiple alarms are alerted to potential problems

Question 20

These building components are noncombustible in both class 1 and 2 (class 2 less fire resistance than class 1)

Answer 20

WPCFR.
Walls
Partitions
Columns
Floors
Roofs

Question 21

Large volumes of black smoke at roof

Answer 21

Roofing materials

Question 22

Light smoke at roof

Answer 22

Defective oil burner

Question 23

Light to moderate black smoke in basements

Answer 23

Oil burner malfunction

signal to bring Class B extinguisher

Question 24

Gray to light brown smoke

Answer 24

Common Class A materials

Question 25

P. 27

Six sides of fire area

Answer 25

FRLRTB
Front 
Rear
Left
Right
Top
Bottom

Question 26

May be possible to move the exposure hazard

Answer 26

Truck and railcars are both possible candidates

Question 27

Most residential rooms have a fire load of _______. Libraries have a loading of ___________.

Answer 27

5 lbs of fuel per sq ft.

25-30 lbs of combustible per sq ft

Question 28

Tests determined flows of ______ for each ______ of fire area are sufficient to control fire for light loads of ordinary combustibles.

Answer 28

10 gpm.

100 sq ft

Question 29

In today’s plastic based society, application rates increase by 50%, so residential flows of ________ per 100 sq ft, commercial flows of ______ and industrial and heavily loaded storage area of _______ per 100 sq ft.

Answer 29

15 resid.
35 comm’l.
50-60 indust/storage

Question 30

Officer opts for “fast knockdown”, which means _____________.

Answer 30

Using a preconnected deck gun or other fast-acting master stream.

Question 31

Difference in Class 3 vs 4 (p. 22)

Answer 31

Class 3 - consists of masonry or other noncombustible walls with 2 hr fire-resistance rating
Class 4 - EXTERIOR WALLS of these buildings are of masonry or some other noncombustible material with AT LEAST a 2 hr fire resistance rating

Question 32

An out of service auxiliary appliance is often ________________.

Answer 32

Justification for an extra alarm.