AUC 349

Question 0

During Positive Pressure Ventillation, what is the optimal placement of the positive pressure fan (PPF)?
7.2

Answer 0

4-6 feet from the attack stairway door, on the ground floor, and directly facing the door to the stairwell with an angle tilt of 80 degrees.

Question 1

What is the priority order for use of positive pressure fans?
6.5,

Answer 1

1. Pressurize the ATTACK STAIRWELL
2. Pressurize the EVACUATION STAIRWELL
3. Ventilating the PUBLIC HALLWAYS

Question 2

True or False

Placement of the PPF in the stairwell increases the positive pressure created within the stairwell.
7.2

Answer 2

FALSE.
The fan shall be positioned to blow into the stairwell; it should not be placed in the stairwell. Placing the fan in the stairwell does not create any pressure in the stairwell. It may create higher CO levels and negative stack effect by pulling smoke and heat down the stairwell.

Question 3

Positive pressure created within the attack stairwell will be great enough for ____ stairway doors to be open?
7.3

Answer 3

The pressure delivered to the attack stair by the PPF will be great enough to allow for up to three (3) stairwell doors to be open and pressurization to remain effective.

Question 4

Depending on conditions, 1 fan can provide the proper pressurization in the stairwell up to ___ stories. 2 fans will pressurize a ___ story building when properly placed.
7.3

Answer 4

10, 40

Question 5

If the fire floor is above the ___ floor, or additional pressures are required to maintain the stairwell free of smoke, a second PPF is brought ___ floors below the fire floor and set up.
7.3

Answer 5

10, 3

Question 6

The unit assigned to respond and operate the PPF will be known as _____? The company officer will be designated _____? Members operating PPF’s in the lobby are designated _____ and members operating PPF’s near the fire floor are designated ____? The member assigned to the roof shall be designated ____?
6.1

Answer 6

Ventilation Support Group;
Vent Group Supervisor;
Vent Group Lobby Unit;
Vent Group Fire Unit;
Vent Group Roof