Classification society requirements...

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Question 1 of 2066636eee28f7522a1c51e660

Classification society requirements stipulate that main sea water cooling pumps be furnished with redundancy with either two dedicated pumps or with one dedicated pump and one standby pump available for other sea water services. Referring to the illustrated motor ship sea water cooling system drawing, what statement is true concerning meeting these classification society requirements? Illustration MP-CW-01

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🔍 Key Concepts

• Redundancy requirements for main sea water cooling pumps in classification rules (one pump may be standby for other sea water services). • How the piping arrangement and valve lineup in the drawing show which services each sea water pump can supply. • Which systems (fire, bilge, ballast) usually must remain independent or have their own dedicated emergency capacity.

💭 Think About

• On the diagram, trace the discharge of the standby pump: which manifolds or headers can it connect to by opening or closing valves? • Ask yourself: if the main engine cooling pump fails, which alternative pump on the drawing can immediately supply sea water to the main engine cooler with only valve changes? • Consider which of the listed services is least acceptable to lose if it is being used to back up main engine cooling in an emergency.

✅ Before You Answer

• Verify from the drawing which pump(s) are labeled ‘main SW cooling’ and which lines connect to fire main, bilge, or ballast systems. • Confirm whether the emergency fire pump appears as a completely separate pump and sea suction on the diagram. • Make sure the selected option still leaves an independent means of fire protection and complies with typical class rules on fire and bilge system separation.

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