Which fire extinguisher is suitable for a live electrical fire?

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RRB ALP Mechanic Diesel 21 Jan 2019 Official Paper (Shift 1)
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  1. Halon (FE)
  2. Foam (FE)
  3. Water filled (FE)
  4. Liquified chemical

Answer (Detailed Solution Below)

Option 1 : Halon (FE)
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Detailed Solution

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Explanation:

Types of fire extinguishers:

Halon extinguishers:

  • These extinguishers may be filled with carbon-tetrachloride and Bromochlorodifluoro methene (BCF).
  • They may be either gas cartridges or stored pressure type.
  • They are more effective in extinguishing small fires involving pouring liquids.
  • These extinguishers are particularly suitable and safe to use on electrical equipment as the chemicals are electrically non-conductive.

Foam extinguishers:

  • These may be stored pressure or gas cartridge types.
  • Always check the operating instructions on the extinguisher before use.
  • Most suitable for:
    • flammable liquid fires
    • running liquid fires.
  • Must not be used on fires where electrical equipment is involved.

Water-filled extinguishers:

  • There are two methods of operation.
    • Gas cartridge type
    • Stored pressure type
  • With both methods of operation the discharge can be interrupted as required, conserving the contents and preventing unnecessary water damage.

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