Positive Pressure Ventilation M.P.202.12D

Question 1

Positive pressure ventilation (PPV) has many benefits to fire operations
PPV can reduce what?
PPV can improve what?
PPV removes what?

Answer 1

• Reduces the fires ability to propagate and advance
• Reduces firefighter heat stress
• Reduces damage to structure
• Reduce the risk and need of roof ventilation
• Improving atmosphere–thus improving patient survivability profiles
• Visibility increases

-Removes heat and smoke improving ability to conduct S/R

Question 2

All offensive fire operations qualify for early application of PPV

True or false

Answer 2

True

Question 3

Fans should be placed at point of entry from unburned side of fire how many feet back from the door?
Objective is to create a pressure “cone” effect around the door.

Answer 3

12’-15’ back

Question 4

When additional fans are needed, placing two or more in “________” is more effective than side-by-side.

Answer 4

“tandem”

Question 5

PPV must have 2 major items?

Answer 5

1. An “exit” for the pressurized air and must be located in the fire area.
2. PPV must be injected from the unburned side of fire.

Question 6

Too many openings or exit points
reduce the effectiveness of PPV. In some cases, windows and doors that are already open may need
to be What?

Answer 6

closed

Question 7

ATTIC FIRES-
Isolated attic fires can benefit from PPV
True or false

Answer 7

True

Question 8

ATTIC FIRES-
During initial attack, fire crews should use small openings in the ceiling for _____ application. This will prevent the clear environment below the ceiling from rapidly filling with _______.

Answer 8

• water

- smoke

Question 9

Multi-story/High-rise PPV

-________ should be used

Answer 9

-Stairwell

Question 10

Multi-story/High-rise PPV

-An ____ in the fire area (window) is first choice

Answer 10

-exit

Question 11

Multiple fans may be required. A fan will be needed at the entry to the fire floor.
How many fans may be needed at the base of the building?
What locations may additional fans be needed?

Answer 11

• two or more

- On landings at various levels in the stairwell

Question 12

Regarding PPV for Exposure Control, it is most effective with what and give two examples.

Answer 12

Most effective with common attics (strip shopping centers, apartment complexes)

Question 13

For exposure control, where would the fans be placed?

Answer 13

At an entry point at most severe exposure first

Question 14

After fans have been placed at an entry point at the most severe exposure, what receives PPV next?

Answer 14

The second most critical exposure would then receive PPV