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Which material are used as fire extinguisher?
Carbon Dioxide
Dry CTC
Both
None of this
Both
Both Carbon Dioxide (CO2) and Carbon Tetrachloride (CTC) are effective fire extinguishing agents, particularly for electrical fires. CO2 works by displacing oxygen to smother the flames, while CTC acts as a chemical blanket that interrupts the combustion chain reaction.
Both Carbon Dioxide (CO2) and Carbon Tetrachloride (CTC) are effective fire extinguishing agents, particularly for electrical fires. CO2 works by displacing oxygen to smother the flames, while CTC acts as a chemical blanket that interrupts the combustion chain reaction.
CO2тАЛ+FireтЖТSmothering
CCl4тАЛ+HeatтЖТCCl4тАЛ(vapor)
In electrical installations, water is strictly avoided due to its conductivity. CO2 extinguishers operate by rapidly cooling the surrounding area and reducing the concentration of oxygen below the level required to support combustion. Dry CTC (Carbon Tetrachloride) works by producing heavy, non-combustible vapors that sink to the base of the fire, displacing the oxygen necessary for combustion.
CO2 is preferred for electrical equipment as it is non-conductive and leaves no residue.
CTC is highly effective but toxic, and its use is restricted due to ozone layer depletion concerns.
Water should never be used for Class C (electrical) fires due to the risk of electric shock.
Non-conductive (safe for live electrical gear)
No cleanup residue
Rapid suppression
CO2 can cause asphyxiation in confined spaces
CTC releases toxic phosgene gas when exposed to high heat
Environmental impact of halon-based extinguishers
Electrical Substations
Computer Server Rooms
Laboratories
| Feature | Carbon Dioxide | Carbon Tetrachloride |
|---|---|---|
Extinguishing Mechanism | Oxygen Displacement | Chain Reaction Inhibition |
CTC is technically classified as a halogenated hydrocarbon.
Option B refers to 'Dry CTC', which is a specific pressurized form of carbon tetrachloride formerly used in industry.
C is correct тАФ Both Carbon Dioxide and Dry CTC are widely recognized and used as fire extinguishing agents for electrical installations.
Always remember that for electrical fires, the extinguishing agent must be a non-conductor to prevent short-circuits and shock hazards to the operator.