What are three characteristics of a water mist suppression system? (Choose three.)

Question

Options

• ARequires manual activation
• BUses minimal storage space
• CDischarges very fine water droplets
• DIs popular in industrial environments
• EExtinguishes fire by absorbing oxygen

• A
  4% (1)
• B
  83% (20)
• C
  4% (1)
• E
  8% (2)

Explanation

Note: This question asks for three correct answers, but only "B" is listed as correct - likely a formatting error. The three correct answers should be B, C, and E.

Why B is correct: Water mist systems use extremely fine droplets, which means far less water is needed compared to traditional sprinkler systems. This dramatically reduces tank and pipe size, making minimal storage space a genuine advantage.

Why the distractors are wrong:

• A (Requires manual activation): Incorrect - water mist systems are typically automatic, activating in response to heat or smoke.
• C and E are actually correct, not distractors: C (discharges very fine water droplets) is the defining physical characteristic of water mist, and E (displaces oxygen) is a key suppression mechanism - though "absorbs" oxygen is slightly imprecise; the steam generated displaces oxygen.
• D (Popular in industrial environments): Incorrect - water mist is more commonly used in marine vessels, data centers, museums, and heritage buildings, not general industrial settings.

Memory tip: Think of water mist as the "precise surgeon" of fire suppression - it uses tiny droplets (C), needs little storage (B), and chokes the fire by turning to steam that displaces oxygen (E). If a choice sounds too broad or manual, it's likely wrong.

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