Page 60 - Red Alert

RED ALERT - THE FIRE SERVICE

Breathing apparatus ACTIVITY
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Firefighters wear breathing apparatus sets to enable them to survive in smoky conditions.
The time that they can work in a smoky atmosphere depends upon the amount of air inside the cylinder.

Using the table below and a 24 hour clock, calculate the time that a firefighter would have to come out of a fire?

EXAMPLE

ENTRY TIME CYLINDER PRESSURE TIME OF EVACUATION
10.30 180 = 40 minutes 11.10
CYLINDER TIME IN
PRESSURE MINUTES

200 45 Using the above information calculate the answers
in this table:
190 43
ENTRY TIME CYLINDER PRESSURE TIME OF EVACUATION
180 40
a. 09.00 200 =

170 38 b. 12.45 160 =

c. 14.02 150 =
160 35
d. 16.17 130 =
150 32
e. 18.27 190 =

140 29 f. 23.42 170 =

130 26 g. 00.01 140 =

58 ANSWERS: a. 9.45, b. 1.20, c. 14.34, d. 16.43, e. 19.10, f. 00.20, g. 00.30.