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In the event of a fire, which of the following aircraft component parts or liquids when burnt may give off toxic fumes?

1. Hydraulic fluids
2. Fire extinguishers made of steel
3. Furnishing and trimming materials
4. Anti-icing fluids

  • A
    1, 3 and 4.
  • B
    1, 2 and 3.
  • C
    3 only.
  • D
    1 and 3.

In case of fire on board an aircraft, some cabin furnishings and trimming consist of plastic materials which give off poisonous fumes as they are heated. In manufacturing, cyanide is used to make plastics. Cyanide is a potentially deadly chemical which prevents the exchange of oxygen between blood and tissues, resulting in suffocation.

  • "Anti-icing fluids" INCORRECT. Anti-icing fluid gives off fumes which, if allowed to enter the fuselage, can be harmful. But please note that this question asks about aircraft fires, hence anti-ice answer is not correct.
  • "Hydraulic fluids" are considered fire resistant but can sustain combustion. When burning, hydraulic fluid will release roxic fluids.
  • "Fire extinguishers made of steel" is clearly the least likely option.

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