F80 Smoke Control and HVAC Systems 5

Question 1

A fire alarm activates on the 10th floor of a high-rise with a smoke control system. Which action is typically automatic?

Accepted Answer

Starting stair pressurization fans

Answer

Stair pressurization fans usually start automatically on fire alarm to protect the exits.

Question 2

How should the fire alarm system monitor a smoke control fan's operation?

Accepted Answer

By positive confirmation such as airflow or pressure proof

Answer

Smoke control components require positive confirmation of operation, such as airflow switches, not just a command signal.

Question 3

While testing, the Certificate of Fitness holder finds a duct detector's remote test switch does not shut down the air handler. What should be done?

Accepted Answer

Report the impairment and have the interlock repaired

Answer

A failed HVAC shutdown interlock is a system impairment that must be reported and corrected.

Question 4

Smoke dampers in a smoke control system should report their position to the control panel for what reason?

Accepted Answer

To confirm the damper actually reached its commanded open or closed state

Answer

Position feedback verifies the damper responded properly during smoke control operation.

Question 5

An air handler is shut down for maintenance while its duct detector stays powered. What can happen?

Accepted Answer

The detector may not sample properly because there is no airflow

Answer

Duct detectors rely on airflow through the sampling tubes, so no airflow means unreliable sampling.

F80 Practice Test