Question 845Deck Safety70% to pass
The most effective extinguishing action of dry chemical is _______________.
AI Explanation
The correct answer is A) breaking the chain reaction.
Dry chemical extinguishers work by interrupting the chemical chain reaction that occurs during a fire. The dry chemical agent, such as sodium bicarbonate or potassium bicarbonate, acts to break this chain reaction, thereby suppressing the fire. This is the most effective extinguishing action of dry chemical extinguishers.
The other options are incorrect because they do not accurately describe the primary mechanism by which dry chemical extinguishers work. B) the CO2 that is formed by heat is not the primary extinguishing action. C) smothering is the mechanism for carbon dioxide (CO2) extinguishers, not dry chemical. D) shielding of radiant heat is not the main extinguishing action of dry chemical agents.
Related Questions
#843 In addition to weighing the cartridge, which other maintenance is required for a cartridge-operated dry chemical extinguisher? #844 What is an advantage of a dry chemical extinguisher as compared to a carbon dioxide extinguisher? #846 Which statement(s) is(are) TRUE concerning the use of dry chemical extinguishers? #847 You are fighting a class "B" fire with a portable dry chemical extinguisher. The discharge should be directed _______________.#848 As compared to carbon dioxide, dry chemical has which advantage?