Which physical property of asbestos is commonly cited as contributing to its hazard in construction materials?

• A. Fire resistance
• B. High tensile strength
• C. Electrical conductivity
• D. Magnetic permeability

Answer: (B)

Asbestos hazards come from its fibrous nature and durability. Its high tensile strength means the fibers resist pulling apart and can stay intact under stress. When materials containing asbestos are damaged or deteriorate, these strong fibers are more likely to be released into the air as long, durable strands. Inhaled fibers can reach deep into the lungs and cause serious diseases, with longer fibers posing particular risks. Fire resistance is another property of asbestos, but it doesn’t explain why the fibers become a hazard during normal construction material handling. Electrical conductivity and magnetic permeability aren’t relevant factors for the health hazard in this context. So the attribute that best explains the hazard is the high tensile strength, which helps keep fibers intact and available to become airborne.