🔍 Key Concepts

• Electrostatic charge and how it can build up in liquids and sprays • What happens inside a tank during high-pressure washing (Butterworthing) versus during inerting or ballasting • Conditions needed to create a fine mist or spray of cargo or liquid

💭 Think About

• Which operation produces the finest droplets or spray inside a tank, increasing the chance of static electricity buildup? • During which listed operation is liquid being energetically jetted or washed inside the tank, rather than just filled, vented, or inerted? • Think about where cargo vapors and small liquid droplets mix most intensely inside a tanker tank.

✅ Before You Answer

• Identify which choice involves high-velocity liquid jets or sprays inside a cargo tank • Confirm which operation is most associated with static electricity hazards and electrostatic mist in tanker safety guidelines • Eliminate options that mainly involve gas flow only (little or no liquid spray in the tank itself)