Which statement best describes Wood's metal (Lipowitz alloy) used as a fusible link in sprinkler heads?

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Multiple Choice

Which statement best describes Wood's metal (Lipowitz alloy) used as a fusible link in sprinkler heads?

Explanation:
Wood's metal is used in sprinkler heads because it is a low-melting-point alloy that acts as a precise, temperature-sensitive fuse. It melts at about 70°C, which is roughly 158°F, so when a fire heats the head to that temperature, the alloy liquefies and releases the seal to allow water to flow. This property—a well-defined, low melting point—is why it’s chosen for this application. The other statements describe properties (electrical conduction at high frequency, magnetism, UV transparency) that aren’t relevant to its function as a heat-activated fusible link.

Wood's metal is used in sprinkler heads because it is a low-melting-point alloy that acts as a precise, temperature-sensitive fuse. It melts at about 70°C, which is roughly 158°F, so when a fire heats the head to that temperature, the alloy liquefies and releases the seal to allow water to flow. This property—a well-defined, low melting point—is why it’s chosen for this application. The other statements describe properties (electrical conduction at high frequency, magnetism, UV transparency) that aren’t relevant to its function as a heat-activated fusible link.

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