Discussion
State TRUE/ FALSE for following statements:
1. Foam and water cannot be used as fire extinguisher on electrical equipment.
2. Halon extinguishers may be filled with carbon-tetrachloride and Bromochlorodifluoromethane.
Answer: A
Both statements are true. Foam and water conduct electricity, so they cannot be used on electrical equipment, where they may give a shock to the person using them and damage the equipment. Carbon dioxide or dry powder is used on such fires.
Halon extinguishers have been made with halogenated hydrocarbons such as bromochlorodifluoromethane (halon 1211) and carbon tetrachloride (an older halon-type agent). The statement says they 'may be filled with' these, which is true. The key therefore gives 'True, True', the first option, and 'False' for either statement would be wrong.
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