Question 839Deck Safety70% to pass
An "ABC" dry chemical fire extinguisher would be LEAST effective against a fire in _______________.
AI Explanation
The correct answer is C) a mattress.
An "ABC" dry chemical fire extinguisher is least effective against a fire in a mattress. Dry chemical extinguishers are primarily designed to extinguish fires in ordinary combustible materials (Class A), flammable liquids and gases (Class B), and live electrical equipment (Class C). However, they are less effective against deep-seated, smoldering fires in materials like upholstery or mattresses, which require a cooling effect to fully extinguish. Other types of extinguishers, such as water-based or foam extinguishers, would be more appropriate for a mattress fire.
The other options are incorrect because dry chemical extinguishers are effective against trash can fires (A), spilled liquids (B), and electrical fires (D).
Related Questions
#837 When dry chemical extinguishers are used to put out class B fires, there is a danger of reflash because dry chemical _______________.#838 Dry chemical fire extinguishers are effective on which type(s) of fire? #840 Which action is routinely performed at the annual servicing and inspection of a dry- chemical cartridge-operated portable fire extinguisher? #841 When must a dry chemical fire extinguisher be recharged? #842 Which advantage does dry chemical have over carbon dioxide (CO2