Which statement about tempered and laminated glass is correct?

Which statement about tempered and laminated glass is correct?

• A. Side and rear window glass is laminated
• B. Windshield glass is tempered
• C. Side and rear window glass is tempered
• D. Windshield glass is laminated — bullets fired at a windshield will drop 4 to 6 inches when entering the passenger compartment

Answer: (D)

Placing emphasis on how windshield glass is constructed and behaves when struck helps you understand safety features in vehicles. Windshields use laminated glass, which is made of two layers of glass with a plastic interlayer (usually PVB) in between. If a windshield is cracked or breaks, the interlayer keeps the glass together, forming a barrier that slows or stops objects and reduces the likelihood of someone being ejected. This energy-absorbing setup is why windshields are laminated. In contrast, side and rear windows are typically tempered glass. Tempered glass is strong and safe in that it shatters into many small, blunt pieces, which reduces cutting hazards but does not hold together to resist penetration. So saying side and rear windows are laminated would not fit common vehicle construction. The statement about bullets and a downward drop through a laminated windshield aligns with the idea that the interlayer and layered glass can absorb energy and alter a projectile’s path, causing it to slow and deflect rather than pass straight through. This is why laminated windshields provide some ballistic resistance, even though penetration can still occur. Hence, describing the windshield as laminated best captures the correct material behavior in this context.

Placing emphasis on how windshield glass is constructed and behaves when struck helps you understand safety features in vehicles. Windshields use laminated glass, which is made of two layers of glass with a plastic interlayer (usually PVB) in between. If a windshield is cracked or breaks, the interlayer keeps the glass together, forming a barrier that slows or stops objects and reduces the likelihood of someone being ejected. This energy-absorbing setup is why windshields are laminated.

In contrast, side and rear windows are typically tempered glass. Tempered glass is strong and safe in that it shatters into many small, blunt pieces, which reduces cutting hazards but does not hold together to resist penetration. So saying side and rear windows are laminated would not fit common vehicle construction.

The statement about bullets and a downward drop through a laminated windshield aligns with the idea that the interlayer and layered glass can absorb energy and alter a projectile’s path, causing it to slow and deflect rather than pass straight through. This is why laminated windshields provide some ballistic resistance, even though penetration can still occur. Hence, describing the windshield as laminated best captures the correct material behavior in this context.