The general service pump is to be used to...

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Question 1 of 205eccef9bbacbc34ba4d45682

The general service pump is to be used to remove clean water from the No. 4 port aft cargo hold and discharged through the ballast overboard. What are the minimum number of valves that must be opened on both the suction and discharge to accomplish this task? See illustration GS-0042.

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🔍 Key Concepts

• Trace the suction line from the No. 4 port aft cargo hold all the way to the general service pump on the GS-0042 diagram. • Trace the discharge line from the general service pump to the ballast overboard point, noting each manual valve in that path. • Focus only on valves that must be opened for this specific operation, ignoring check valves and valves on alternate routes.

💭 Think About

• Starting at the No. 4 port aft cargo hold, how many manual valves must be opened before water can reach the suction side of the general service pump? • From the pump discharge, which valves must be opened so the water goes only to the ballast overboard line and not into any other system (bilge, fire main, tanks, etc.)? • Are there any valves already shown in the diagram as normally open, or are they all considered shut for the purpose of this question ("minimum number" implies you open only what you must)?

✅ Before You Answer

• Be sure you count valves on both suction and discharge together for a single total number, not one side only. • Verify whether the general service pump has a dedicated suction stop valve and a discharge stop/selector valve that must each be opened. • Double‑check that you are not counting any check valves or automatic devices as valves to be opened; only count hand‑operated (manual) valves in the flow path.

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