Book 29 Ch 3 Smoke Removal

Question 1

VENTILATION METHODS: There are two basic methods, These are ________ and
____________ positive pressure ventilation

Answer 1

Natural
Mechanical

Question 2

The current methods that are utilized to provide pressurized ventilation with portable blowers are __________ and __________ pressure ventilation

Answer 2

Negative
Positive

Question 3

NEGATIVE PRESSURE VENTILATION - To ventilate the building, the door is opened and a blower is placed _________ the building to exhaust the contaminants

Answer 3

INSIDE

Question 4

POSITIVE PRESSURE VENTILATION - To ventilate the building, the door is opened and a blower is positioned __________ the building

Answer 4

OUTSIDE

Question 5

Compared to negative pressure ventilation, positive pressure ventilation is approximately ________ as effective at removing contaminants from a building

Answer 5

Twice

Question 6

Blowers must be positioned so the cone of air issued from a blower will ____________ cover the entrance opening to eliminate contaminants being forced back through the “unsealed portions” of the entrance opening and being reintroduced into the pressurized building

Answer 6

Completely

Question 7

Positive pressure is most efficient when the exhaust opening (heat hole, window, door, etc.) is between ____ to _____ the size of the entrance opening

Answer 7

3/4
1 3/4

Question 8

If a gasoline powered blower is being utilized and an ________ odor is noticeable inside the building or area to be ventilated, this is an indicator that the exhaust opening is not large enough

Answer 8

Exhaust

Question 9

If it is not possible to utilize the prevailing wind as an advantage, positive pressure has proven effective AGAINST winds (leeward to windward) of up to ___ mph; efficiency will be reduced accordingly

Answer 9

25

Question 10

These two factors will regulate the distance between the blower and the entrance opening:
1. ______ of the opening
2. _____ of the blower

Answer 10

Size
CFM

Question 11

Small blowers (18”) need to be moved ________ from entrance openings while larger blowers (24”) can be placed ________ to entrance openings to properly cover the opening with pressurized air

Answer 11

Back
Closer

Question 12

In Series - For standard entrance openings ___________ effectiveness is achieved by placing two blowers in series (in-line) with each other

Answer 12

Maximum

Question 13

When using two blowers in series, the second increases the front blower capacity by ___%

Answer 13

10

Question 14

When using two blowers in series, place the ______ blower about __ feet back from the entrance opening and utilize the _______ blower behind that

Answer 14

Large
2
Smaller

Question 15

If the area in front of an entrance opening is limited to __ feet or __ feet (i.e., raised porch), place the smaller blower in the entrance opening and the larger blower __ to __ feet back from the door

Answer 15

3 or 4
3 or 4

Question 16

For large entrance openings, multiple blowers in a ________ configuration (Figure 7), should be utilized due to their combined ability to cover the larger opening with pressurized air

Answer 16

Parallel

Question 17

Additionally, remember that removing screens on windows prior to using these openings for ventilation purposes will increase the efficiency of these openings by at least ___%

Answer 17

50

Question 18

Buildings with multiple floors can be ventilated by systematically ventilating each floor. Start where there is the ______ heat and smoke

Answer 18

Most

Question 19

Water powered blowers will produce considerably more _____ than the same size gasoline blowers

Answer 19

CFM

Question 20

Water powered blowers should be considered for:
1. ______________
2. ______________
3. ______________
4. ______________
5. _______/_______

Answer 20

1. Metro rail tunnels
2. High rise buildings
3. Large underground parking structures
4. Very large commercial buildings
5. Rest homes/Hospitals

Question 21

Water powered blowers are ____________ safe and can be utilized at hazardous materials incidents

Answer 21

Intrinsically

Question 22

Overhaul operations are conducted for the purpose of ensuring a fire is completely _____, determining the probable fire _______, and leaving the owner or insurance adjusters some means of determining the ______

Answer 22

Out
Cause
Loss

Question 23

Depending on the type of fire, concentrations of carbon monoxide within the range of ____ parts-per-million (ppm) to _____ ppm are easily obtainable during overhaul operations

Answer 23

500
1200

Question 24

To ____ ppm of carbon monoxide can be inhaled for __ hour without appreciable effects.

Answer 24

500
1

Question 25

To ____ ppm of carbon monoxide inhaled for __ hour will cause some appreciable effects

Answer 25

700 1

Question 26

To _____ ppm of carbon monoxide inhaled for __ hour is dangerous

Answer 26

1200 1

Question 27

Concentrations of _____ ppm of carbon monoxide and over are fatal in less than __ hour

Answer 27

4000 1

Question 28

Measurements during actual overhaul operations have indicated that positive pressure can easily reduce carbon monoxide concentrations of _____ ppm to approximately ____ ppm to ____ ppm

Answer 28

1000 130 to 220

Question 29

A single 18" blower is adequate for an average (_____ square feet) single family dwelling

Answer 29

2000

Question 30

If any fire does begin to accelerate or spread, it can easily be controlled by: - ____________ the fire. - Turning the blower ___ degrees away from opening. - Reducing the ____ of the blower. - Increasing the __________ between the overhaul area and the blower. -Shutting the blower off.

Answer 30

Extinguishing 90 RPM Distance

Question 31

Positive pressure should never be utilized in place of a ______

Answer 31

SCBA

Question 32

For standard entrance openings, multiple blowers in a parallel (side-by-side) configuration are ______ effective than multiple blowers in a series configuration

Answer 32

Less

Question 33

The building has an enclosed stair shaft that is common to each floor, and _______ ______ separating each floor from the stair shaft.

Answer 33

Ponet Door

Question 34

They also pressurize air without carbon monoxide as a by-product and should be considered in rest homes, hospitals, and other types of structures where _____________ __________ should be considered

Answer 34

Respiratory Concerns