FST Smoke Detection 2

Question 1

Which smoke detector type is MOST prone to false alarms from cooking steam and high humidity?

Accepted Answer

Ionization

Answer

Ionization detectors are more sensitive to small combustion particles and can be triggered by steam and high-humidity environments common near kitchens.

Question 2

What is the maximum spacing allowed between smoke detectors on a smooth ceiling under NFPA 72 when no other factors apply?

Accepted Answer

30 feet

Answer

NFPA 72 specifies a maximum 30-foot spacing between smoke detectors on smooth ceilings under standard conditions.

Question 3

A Very Early Warning Fire Detection (VEWFD) system using air-sampling is BEST suited for which environment?

Accepted Answer

Clean rooms and data centers

Answer

Air-sampling VEWFD systems are ideal for clean rooms and data centers where extremely early detection is critical and the environment is controlled.

Question 4

Under NFPA 72, what is the required detector placement distance from a ceiling-mounted HVAC supply air diffuser?

Accepted Answer

At least 36 inches

Answer

NFPA 72 requires smoke detectors to be placed at least 36 inches from HVAC supply air diffusers to prevent airflow from diluting smoke and causing delayed detection.

Question 5

Which condition describes 'stratification' as it relates to smoke detection?

Accepted Answer

Smoke rising and cooling before reaching ceiling detectors

Answer

Stratification occurs when rising smoke cools and becomes neutrally buoyant before reaching ceiling-mounted detectors, preventing activation.

(FST) Fire Safety Technician Certification Practice Test

(FST) Fire Safety Technician Certification Practice Test

FST Smoke Detection 2