Tempered glass is described as which behavior on impact?

Tempered glass is described as which behavior on impact?

• A. It shatters into large shards
• B. It fractures into many small pieces
• C. It remains intact
• D. It melts

Answer: (B)

Tempered glass is safety glass designed to fail safely: on impact it fractures into many small, dull pieces rather than breaking into large, sharp shards. The tempering process puts the outer surface in compression and the inner part in tension, so once a crack starts it propagates rapidly and shatters into numerous tiny fragments. This fragmentation minimizes injury risk compared with ordinary glass, which can crack into large shards or remain intact for a moment. It also doesn’t melt under normal impact.

Tempered glass is safety glass designed to fail safely: on impact it fractures into many small, dull pieces rather than breaking into large, sharp shards. The tempering process puts the outer surface in compression and the inner part in tension, so once a crack starts it propagates rapidly and shatters into numerous tiny fragments. This fragmentation minimizes injury risk compared with ordinary glass, which can crack into large shards or remain intact for a moment. It also doesn’t melt under normal impact.