Ff Ops Bull. 6 Application Of Hose Streams

Front 1

Firefighting Ops Bulletin 6

Back 1

“Hose Streams”

Front 2

When using a fog stream, the officer in charge should watch for displacement indications: first, _______: second, _______and________: and third, _________.

Back 2

Smoke, smoke and condensed steam, condensed steam.

Front 3

When should a fog stream be shut off?

Back 3

As soon as smoke and gas have been displaced by condensed steam.

Front 4

The ____ degree angle produces a good combination of reach and fog pattern, no matter what the size of the hose. Increasing the angle to produce a wider fog pattern gives the firefighter more protection from heat, but it decreases the reach of the stream and fire fighting effectiveness.

Back 4

30

Front 5

Some plastics burn with up to _______ times the BTU output of ordinary combustibles.

Back 5

3

Front 6

If two fog streams are of the same diameter and the water droplets had the same initial velocity, which one will have the greatest reach and why?

Back 6

The one containing the most water will have the greatest reach because it will have the greater momentum.

Front 7

Solid streams are superior to fog streams when their heat absorption qualities are compared. True or False?

Back 7

False, fog streams are superior to solid streams when their heat absorption qualities are compared, but fog streams must have sufficient volume to penetrate the heated area.

Front 8

Application of water fog demands that the fog stream have both sufficient _________ and _________.

Back 8

Reach volume

Front 9

The analysis of the extinguishment of a confined structural fire points out that the extinguishment of the __________ and __________ phases of the fire is identical.

Back 9

second; third

Front 10

When applying a water fog through an opening into a building, the firefighters should position themselves where?

Back 10

They should keep well out of line with the opening to protect themselves from the expulsion of heated gases and steam through the opening.