F80 Smoke Control and HVAC Systems 4

Question 1

What is the purpose of stairwell pressurization?

Accepted Answer

To keep smoke out of the exit stair by maintaining higher pressure inside

Answer

Positive pressure in the stair prevents smoke from entering the protected exit path.

Question 2

Under NFPA 92, what is the typical maximum force allowed to open an exit door in a pressurized smoke control system?

Accepted Answer

30 lbf

Answer

Door opening force must not exceed 30 lbf so occupants can still exit.

Question 3

What is the minimum design pressure difference across a smoke barrier in a sprinklered building per NFPA 92?

Accepted Answer

0.05 in. w.c.

Answer

NFPA 92 lists 0.05 in. water column as the minimum for sprinklered spaces with typical ceiling heights.

Question 4

What is the Firefighter's Smoke Control Station (FSCS)?

Accepted Answer

A control panel giving firefighters manual override of smoke control equipment

Answer

The FSCS lets the fire department monitor and manually control fans and dampers.

Question 5

When the FSCS issues a manual command that conflicts with an automatic smoke control sequence, which takes priority?

Accepted Answer

The FSCS manual command

Answer

Manual commands at the FSCS have the highest priority over automatic and BMS controls.

F80 Practice Test