Question 86Safety & Environmental - 1st Asst/Chief

The correct answer is B) rupture disc. The rupture disc is the passive safety device installed on each Halon fire extinguishing cylinder to prevent over-pressurization. Rupture discs are designed to burst at a specific pressure, relieving the cylinder's internal pressure before it reaches a dangerous level. This safety mechanism helps to prevent the cylinder from rupturing or exploding in the event of an internal pressure buildup. The other options are incorrect because: A) a relief valve is an active safety device that opens at a set pressure, C) the control head does not provide over-pressurization protection, and D) a safety valve is a different type of pressure relief mechanism.