FSD Actuators, Controls & Automatic Operation 3

Question 1

Per UL 555S requirements, what is the maximum time allowed for a smoke damper to reach its fully closed position after receiving an activation signal?

Accepted Answer

75 seconds

Answer

5 seconds

Answer

10 seconds

Answer

5 minutes

Question 2

What is the function of a 'supervisory' signal in a fire damper monitoring system?

Accepted Answer

It monitors and reports the operational status or fault conditions of fire protection equipment

Answer

It confirms that a fire has been actively detected in the zone

Answer

It overrides automatic closure commands sent to fire dampers

Answer

It resets all dampers to their open position following a test

Question 3

Which NFPA standard specifically addresses the design, installation, testing, and maintenance of smoke control systems including smoke dampers?

Accepted Answer

NFPA 92

Answer

NFPA 13

Answer

NFPA 72

Answer

NFPA 101

Question 4

How does a combination fire/smoke damper differ from a standalone smoke damper in terms of activation?

Accepted Answer

It activates on both smoke detection via an electrical signal and excessive heat via a fusible link

Answer

It can only be activated by an electrical signal from a fire alarm panel

Answer

It uses pneumatic pressure for both fire and smoke activation modes

Answer

It only closes upon manual command from building operations personnel

Question 5

What is the role of duct smoke detectors in relation to smoke damper automatic operation?

Accepted Answer

They detect smoke in the airstream and signal the FACP to close associated smoke dampers

Answer

They measure duct static pressure to optimize fan speed

Answer

They trigger the building sprinkler system when smoke enters ductwork

Answer

They alert maintenance staff when air filters become clogged

Question 6

When a building automation system (BAS) is integrated with smoke damper controls, what is a mandatory life safety requirement?

Accepted Answer

The fire alarm system must take priority over BAS commands during a fire event

Answer

The BAS must be able to override fire alarm system commands for energy efficiency

Answer

The BAS controls all damper operations independently of the fire alarm system

Answer

BAS integration eliminates the need for a separate fire alarm panel

Question 7

What is the purpose of verifying smoke damper actuator 'end-of-travel' limits during commissioning?

Accepted Answer

To verify the damper achieves fully open and fully closed positions and that limit switches accurately report those positions

Answer

To confirm the actuator operates within its rated voltage range

Answer

To measure the time required for the actuator to complete a full stroke

Answer

To check that the actuator spring tension matches the manufacturer's torque specification