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BFD 12 Month Test Prep > Ventilation > Flashcards

Flashcards in Ventilation Deck (18)
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1

At what percentage of oxygen does free burning become a smoldering fire?

13-15%

2

Before venting, ti crucial to know the size and location of the fire as well as the ____?

Building type

3

Breaking the glass and then cutting around three edges is a method used on ?

Wired glass windows for ventilation.

4

Carbon monoxide and other products increase as oxygen drops below____ %?

17%

5

Define reverse stack effect.

When outside air is warmer than inside.

6

In the coffin cut, which cut should be the longest?

Third.

7

On metal deck roofs, joists can be spaced ___ feet apart?

2-8

8

Positive pressure hours not be used for ____?

Vent, enter, search.

9

Opening the floor near an exterior window works for ___?

Basements with no openings.

10

Punched, kerf, and triangle are three ___?

Names of inspection holes.

11

Trench cuts should be ___ feet wide?

3

12

What is 30 times more toxic than carbon monoxide?

Hydrogen Cyanide

13

What types of roofs, under regular conditions, have spongy feel?

Inverted roofs

14

When considering natural ventilation you must consider proximity to contaminants and ____?

Size of opening

15

when oxygen levels in a fire decrease below 21%___?

Burning process reduces and smoke production increases

16

When performing hydraulic ventilation firefighters must watch for ___?

Fire lighting up behind them

17

Which of the following are indication on where to cut over the fire?

Asphalt shingles curling up, and a wet roof with dry areas.

18

Which tool is not usually used in roof venting operations?

Pry bar