PADI Divemaster Certification Practice Exam 2025 - Free Divemaster Practice Questions and Study Guide

Question: 1 / 480

A burst disk will fail at approximately what percentage of a cylinder's working pressure?

120%

130%

140%

The correct answer is that a burst disk will typically fail at approximately 150% of a cylinder's working pressure. Burst disks are safety devices designed to relieve excess pressure to prevent cylinder ruptures, acting as a critical fail-safe. By being set to fail at this percentage, they ensure that the cylinder operates within safe limits during normal use, allowing for a margin of safety that protects both the equipment and the diver.

The failure of the burst disk at this specific threshold ensures that any pressure increase beyond the working limits is managed safely. This aspect is crucial for maintaining the integrity of the diving cylinder and preventing catastrophic failure in emergency situations where the pressures may exceed normal operational ranges. Thus, the design and functionality of burst disks are paramount in promoting diver safety.

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150%

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