Which risk increases when a bimetallic strip is used in a fire alarm and overheats?

💡 Explanation

When a bimetallic strip overheats, differential thermal expansion occurs because the two metals have different coefficients, causing the strip to bend excessively and trigger the alarm prematurely. Therefore a false alarm results, rather than fatigue, delay or accuracy, which require different conditions.

• Which chemical change results when ultraviolet radiation weakens polymers?
• Which mechanism limits the maximum operating temperature of a polymer composite material used for aircraft wings?
• Which outcome occurs when a humid air parcel rises, initiating cloud formation?
• Which outcome occurs when combustion instability escalates inside a pulse detonation engine's cycle?
• Which consequence results when a dielectric material exhibits unusually high permittivity under specific alternating voltage characteristics?
• Which outcome occurs when an endothermic catalytic chemical reaction occurs at very high temperature?