🔍 Key Concepts

• Redundancy and continuity of operation in engine-room systems • How heating heavy fuel oil affects viscosity and engine performance • Typical reasons for using multiple smaller units instead of one large unit in marine systems

💭 Think About

• Ask yourself which option directly supports keeping the plant running if one component fails or needs maintenance. • Consider whether any option describes a clear advantage that specifically comes from having several heaters instead of a single large one. • Think about which choices could be true in theory, but are not the primary design reason for dividing heaters into several units.

✅ Before You Answer

• Identify which choice most clearly provides operational flexibility and ability to remain in service during repairs. • Check whether the option you are considering would still make sense if there were only one heater instead of several. • Eliminate any option that does not depend on having heaters divided into several units.