On tankers using manually operated tank...

On tankers using manually operated tank...

Question 1 of 270705eccef9bbacbc34ba4d4538c

On tankers using manually operated tank valves, what does the deck hand wheel indicator register?

Question 1 of 27070

Q

On tankers using manually operated tank valves, what does the deck hand wheel indicator register?

🔍 Key Concepts

• Function of a remote deck hand wheel on a manually operated tank valve • Difference between valve position indication and tank condition (such as level or oxygen content) • How operators keep track of how far a manual valve has been opened or closed

💭 Think About

• Ask yourself: what simple mechanical motion does a hand wheel make, and what is the easiest way to indicate that motion on a deck indicator? • Which of the answer choices describe something that can be shown directly by a mechanical linkage, without electronics or sensors inside the tank? • Think about tanker operations: why would you need to know how far you have turned a valve when starting or stopping cargo flow?

✅ Before You Answer

• Focus on what a purely mechanical deck indicator linked to a hand wheel can realistically show • Eliminate options that would require sensing conditions inside the tank (like gas concentration or liquid level) rather than valve movement • Consider that a manually operated valve often uses turns of the wheel as the operator’s reference for how open or closed it is