Which of the following conditions will cause...

Which of the following conditions will cause...

Question 1 of 270705eccefa1bacbc34ba4d47348

Which of the following conditions will cause the engine to operate in area "A" of the diagram shown in the illustration? See illustration MO-0126.

Question 1 of 27070

Q

Which of the following conditions will cause the engine to operate in area "A" of the diagram shown in the illustration? See illustration MO-0126.

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🔍 Key Concepts

• Study how engine speed (% n) and brake mean effective pressure (% bmep) combine to give % engine power on this diagram. • Notice that area A is at roughly normal or slightly higher speed, but at reduced load/pressure compared to MCR. • Think about which condition makes the ship easier to push (less propeller load) versus harder to push (more propeller load), and how that shifts the operating point on the diagram.

💭 Think About

• For each choice, ask: does this make the propeller demand more power at a given RPM, or less power? • If the propeller load decreases, what happens to engine RPM and bmep when the bridge orders the same shaft RPM as before? • Look at the arrow labeled "p" (propeller curve). Under which condition would the engine operate to the right and slightly below the normal propeller curve (higher speed, lower bmep)?

✅ Before You Answer

• Verify whether area A corresponds to under-loaded or over-loaded engine operation on the diagram. • For each answer choice, decide if it makes the ship heavier to move (more resistance) or lighter to move (less resistance) through the water. • Be sure your selected condition matches higher % engine speed with relatively lower % bmep at the same power order.