FSD HVAC Systems & Airflow Control 4

Question 1

Which test is used to verify that a smoke damper actuator will close the damper within the required time after receiving a control signal?

Accepted Answer

Operational test per NFPA 105

Answer

NFPA 105, Standard for Smoke Door Assemblies and Other Opening Protectives, includes operational test requirements that verify smoke damper response time upon receiving a control signal.

Question 2

A fire damper in a curtain-type (multi-blade) configuration differs from a single-blade design primarily in that:

Accepted Answer

Multiple interlocking blades fold into a pocket when open and drop closed as a curtain when triggered

Answer

Curtain-type fire dampers use multiple interlocking blades stored in a side pocket when open; upon fusible link release, the blades deploy across the duct opening like a falling curtain.

Question 3

What is the significance of the 'E' suffix in a smoke damper's leakage classification (e.g., Class II E)?

Accepted Answer

The damper is tested for leakage at elevated temperature per UL 555S

Answer

The 'E' suffix in UL 555S leakage classifications indicates the damper has been tested and rated for leakage performance at elevated temperatures (250°F), verifying it maintains containment in hot smoke conditions.

Question 4

When sizing a fire damper for installation in a duct, which factor determines the required damper size?

Accepted Answer

The outside dimensions of the duct or the rough opening in the rated assembly

Answer

Fire damper size is determined by the duct outside dimensions or the rough opening in the rated wall/floor assembly, ensuring the damper sleeve fits properly and seals the penetration.

Question 5

In a dedicated smoke exhaust system, smoke dampers on floors not involved in a fire are typically:

Accepted Answer

Closed to prevent smoke from spreading to those floors via the exhaust shaft

Answer

In a dedicated exhaust smoke control system, dampers on uninvolved floors are closed so the exhaust fan draws smoke only from the fire floor, maximizing extraction efficiency and preventing spread.

(FSD) Fire and Smoke Damper Certification Practice Test

(FSD) Fire and Smoke Damper Certification Practice Test

FSD HVAC Systems & Airflow Control 4