Ventilation

Question 1

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

Answer 1

13-15%

Question 2

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

Answer 2

Building type

Question 3

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

Answer 3

Wired glass windows for ventilation.

Question 4

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

Answer 4

17%

Question 5

Define reverse stack effect.

Answer 5

When outside air is warmer than inside.

Question 6

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

Answer 6

Third.

Question 7

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

Answer 7

2-8

Question 8

Positive pressure hours not be used for ____?

Answer 8

Vent, enter, search.

Question 9

Opening the floor near an exterior window works for ___?

Answer 9

Basements with no openings.

Question 10

Punched, kerf, and triangle are three ___?

Answer 10

Names of inspection holes.

Question 11

Trench cuts should be ___ feet wide?

Answer 11

3

Question 12

What is 30 times more toxic than carbon monoxide?

Answer 12

Hydrogen Cyanide

Question 13

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

Answer 13

Inverted roofs

Question 14

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

Answer 14

Size of opening

Question 15

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

Answer 15

Burning process reduces and smoke production increases

Question 16

When performing hydraulic ventilation firefighters must watch for ___?

Answer 16

Fire lighting up behind them

Question 17

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

Answer 17

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

Question 18

Which tool is not usually used in roof venting operations?

Answer 18

Pry bar