Which device is used as a release mechanism in sprinkler heads?

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Multiple Choice

Which device is used as a release mechanism in sprinkler heads?

Explanation:
Sprinkler heads rely on a heat-sensitive release device to start water flow. The most common mechanism is a frangible bulb: a small glass capsule filled with a liquid that expands when heated. When the temperature reaches the head’s rating, the liquid expands enough to crack the bulb, releasing the plug that keeps the water passage closed and allowing water to spray out from the head. The other options aren’t used as the standard release mechanism in typical sprinkler heads.

Sprinkler heads rely on a heat-sensitive release device to start water flow. The most common mechanism is a frangible bulb: a small glass capsule filled with a liquid that expands when heated. When the temperature reaches the head’s rating, the liquid expands enough to crack the bulb, releasing the plug that keeps the water passage closed and allowing water to spray out from the head. The other options aren’t used as the standard release mechanism in typical sprinkler heads.

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