As an engineer of a slow-speed diesel...

Question 1 / 2066636eef28f7522a1c51fa96

Question 1 of 2066636eef28f7522a1c51fa96

As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?

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Question 1 of 20

66636eef28f7522a1c51fa96

As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?

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🔍 Key Concepts

• Indicator cards and what a flat top near Top Dead Center (TDC) tells you about how pressure is being recorded over time • How the spring constant (k value) of the indicator spring affects the sensitivity and scaling of the pressure trace • Effect of engine RPM on the shape and readability of an indicator diagram on a slow‑speed diesel

💭 Think About

• Ask yourself: if the top of the diagram is flat, does that mean the cylinder pressure is actually constant there, or could it be that the instrument is not responding quickly/sensitively enough? • Think about what happens to the recorded trace when the indicator spring is too stiff vs. too soft for the pressure range—how would each affect the height and detail of the curve near TDC? • Consider how changing RPM (higher or lower) would change the time available per cycle and whether that would sharpen or smear the indicator diagram on a slow‑speed engine

✅ Before You Answer

• Make sure you understand whether a higher k value means a stiffer or softer spring and how that affects deflection for a given pressure. • Verify in your notes how slow‑speed engines are usually indicated (at what approximate RPM range) and why that is chosen. • Before choosing, imagine the ideal indicator card shape for good combustion and ask which change would move the diagram closer to that shape rather than just masking the problem.

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Question 1 of 20

As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?

Use a spring with a higher spring constant (k value) in the indicator.

Use a spring with a lower spring constant (k value) in the indicator.

Increase the RPM at which the readings are taken.

Reduce the RPM at which the readings are taken.

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Question 1 / 2066636eef28f7522a1c51fa96

Question 1 of 2066636eef28f7522a1c51fa96

As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?

Back

Question 1 of 20

66636eef28f7522a1c51fa96

As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed