🔍 Key Concepts

• Basic properties of common fuel and cargo gases used on vessels • Safe methods vs unsafe methods of leak detection • Why visual signs like flame or changes in pressure are not primary leak indicators

💭 Think About

• Which option would allow you to notice a gas leak before it becomes dangerous? • Which methods listed would actually increase the risk to personnel or the system? • In normal shipboard practice, how are leaks first suspected by crew working near the system?

✅ Before You Answer

• Identify which choice is a natural characteristic of gas rather than an added hazard • Eliminate any option that requires you to be very close to the leak or to touch the piping • Eliminate options that depend on a condition that is already unsafe (e.g., visible flame, abnormally high pressure)