Which feature relates to safety during use of engineering materials?

• A. Safety in Use
• B. Form of Supply
• C. Relative Cost
• D. Availability

Answer: (A)

Safety in use is about how a material behaves in service and what precautions are needed to keep people and equipment safe. It covers how properties like strength, toughness, heat resistance, corrosion, and flammability translate into safe handling, operation, and maintenance, and it guides engineers in choosing materials and defining safe operating procedures. Because the question asks which feature relates to safety during use, this option directly addresses that aspect. The other factors—form of supply (how the material is delivered), relative cost (economic considerations), and availability (how easily it can be obtained)—involve procurement and expense, not safety in operation.