Which class of fire extinguisher is required for electrical equipment fires?
Correct Answer
C) Class C
Class C fire extinguishers are specifically designed for electrical equipment fires. They contain non-conductive agents that won't create electrical hazards when used on energized equipment.
Why This Is the Correct Answer
Class C fire extinguishers are specifically designed for electrical equipment fires involving energized electrical equipment. They contain non-conductive extinguishing agents such as carbon dioxide, dry chemical powders, or clean agents that won't conduct electricity. This prevents the risk of electrical shock to the operator and avoids creating additional electrical hazards. Class C extinguishers are essential for safely suppressing fires in electrical panels, motors, appliances, and other live electrical equipment without compromising electrical safety.
Why the Other Options Are Wrong
Option A: Class D
Class D fire extinguishers are designed specifically for combustible metal fires involving materials like magnesium, titanium, aluminum powder, and sodium. They use special dry powder agents that smother metal fires. Class D extinguishers are not suitable for electrical fires and would not provide the non-conductive properties needed for electrical equipment safety.
Option B: Class B
Class B fire extinguishers are designed for flammable liquid fires such as gasoline, oil, grease, and paint. While some Class B agents may be non-conductive, they are not specifically formulated for electrical equipment fires. Using a Class B extinguisher on electrical equipment may not provide adequate protection against electrical hazards.
Option D: Class A
Class A fire extinguishers are designed for ordinary combustible materials like wood, paper, cloth, and plastic. They typically use water or water-based solutions as extinguishing agents. Water conducts electricity, making Class A extinguishers extremely dangerous to use on electrical equipment as they can cause electrocution and spread the fire through electrical systems.
Memory Technique
Remember 'C for Current' - Class C extinguishers are for electrical Current/equipment fires. The 'C' stands for electrical Current, and these extinguishers won't Conduct electricity.
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass