Chapter 14: Special Ventilation Operations

Question 1

Some of the challenges high-rise fires present are?

Answer 1

• Limited access
• large numbers of offices or apartments
• Heavy occupant loads
• Failing glass and other debris
• rapid smoke and fire spread to vertical shaft
• locked interior doors
• Low water pressure
• Having to climb in extraordinary number of stairs to reach the fire

Question 2

In high-rise fires which floor does most departments attack the fire from?

Answer 2

The floor below the fire

Question 3

In a high-rise fire which floor does most departments stage on?

Answer 3

Two floors below the fire.

Question 4

A fully equipped fire fire, especially when we’re in afford to bail or carrying spare tanks can weigh more than how many pounds?

Answer 4

300lbs

Question 5

Fire behavior in high-rise buildings is most affected by?

Answer 5

Stack affect and mushrooming

Question 6

Tendency of heat, smoke, and other products of combustion to rise until they encounter a horizontal obstruction. At this point they will spread laterally until they encounter a vertical obstruction and begin to bank downward.

Answer 6

Mushrooming

Question 7

Natural vertical movement of heat and smoke (convection) in tall structures.

Answer 7

Stack effect

Question 8

Once ______ occurs, the smoke spreads latterly and downward into the building is either completely filled or it is ventilated.

Answer 8

Stratification

Question 9

Most PPV blowers position at street level are affective up to about__floors.

Answer 9

22 floors

Question 10

In a high-rise structure ventilation options available are?

Answer 10

• Vertical (top)Ventilation
• horizontal ventilation of the fire floor
• Horizontal ventilation above and below the fire floor

Question 11

Any elevator that serves the fire floor or above should not be used by occupants or firefighters unless?

Answer 11

The officer in charge on the fire floor determines that it is safe to do so.

Question 12

Structure on the roof of a building that may be use as a living space, to enclose mechanical equipment, or to provide roof access from an interior stairway. Also called a bulkhead.

Answer 12

Penthouse

Question 13

The point within the building, especially a high-rise, with the interior pressure equals the atmospheric pressure outside.

Answer 13

Neutral pressure player

Question 14

Neutral pressure playing exist at the level of Ambien atmospheric pressure,Usually between__percent and__percent of the buildings height.

Answer 14

35 and 50 percent

Question 15

When Maye wincing below the fire be necessary?

Answer 15

When the smoke has spread to the floors below the fire due to reverse stack affect or mushrooming.

Question 16

In a high-rise structure because this test is difficult, time consuming, and potentially very dangerous to those in the street below, horizontal ventilation of the fire floor should be done only when there is?

Answer 16

No other choice

Question 17

In a high-rise structure ventilating above the fire floor will be most effective if?

Answer 17

The process is started at the top of the building.

Question 18

HVAC system for small control should be left to the?

Answer 18

Building engineer

Question 19

Device to restrict the flow of smoke too and air handling system. Usually activated by the building spire alarm signaling system.

Answer 19

Smoke damper

Question 20

As it pertains to automatic roof fence, although some are now activated by smoke detectors, most still operate through the use of ___________ connected to spring loaded or counterweighted cover assembly’s.

Answer 20

Visible links

Question 21

We are atriums most commonly found?

Answer 21

Hotels and office buildings