Which of the following is designed to detect the unwanted presence of fire by monitoring environmental changes associated with combustion?

Question

Options

• AFire sprinkler
• BFire suppression system
• CFire alarm system
• DGaseous fire suppression

• A
  7% (4)
• B
  2% (1)
• C
  88% (50)
• D
  4% (2)

Explanation

A fire alarm system (C) is specifically engineered to detect fire by sensing environmental changes like smoke, heat, or combustion gases - its purpose is monitoring and alerting, which matches the question's definition exactly.

Why the others are wrong:

• A. Fire sprinkler - a suppression device that responds to heat with water; it does not monitor or alert.
• B. Fire suppression system - a broad category of systems that extinguish fire; suppression is the action taken after detection.
• D. Gaseous fire suppression - a specific suppression method (e.g., CO₂, FM-200) that smothers fire; again, this is response, not detection.

Memory tip: Focus on the verb in the question - "detect". Only an alarm system's job is to detect and alert; sprinklers and suppression systems act, not detect. Think: Alarm = Alert, Suppression = Squash.

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