A possible cause for an individual piston to...

Question 1 / 205eccefa3bacbc34ba4d47ded

Question 1 of 205eccefa3bacbc34ba4d47ded

A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to __________.

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Question 1 of 20

5eccefa3bacbc34ba4d47ded

A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to __________.

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🔍 Key Concepts

• combustion timing in diesel engines and how early vs late injection affects knocking • the role of bearing clearances and running gear in causing mechanical noise at top dead center (TDC) • how cylinder overloading might change pressures and temperatures in the combustion space

💭 Think About

• Which of the listed conditions could create a sharp pressure rise or mechanical impact exactly when the piston is at TDC? • Think about which options are related to combustion events versus purely mechanical looseness in the crank/rod/pin assemblies. • For each choice, ask: would this realistically cause a single piston to knock at TDC on a slow-speed, two-stroke main engine, or would it more likely affect all cylinders or show up differently?

✅ Before You Answer

• For early fuel injection, consider what happens to peak cylinder pressure and the timing of that peak relative to TDC. • For excessive bearing play, visualize how extra clearance at the crankpin, crosshead, or gudgeon pin could create metal-to-metal impact right as load reverses at TDC. • For overloading of the cylinder, check whether it typically shows as a steady overload condition (high temp/pressure) or as a distinct knock at a specific crank angle.

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Question 1 of 20

A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to __________.

early fuel injection

excessive bearing play within the running gear

overloading of the cylinder

all of the above

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Question 1 / 205eccefa3bacbc34ba4d47ded

Question 1 of 205eccefa3bacbc34ba4d47ded

A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to __________.

Back

Question 1 of 20

5eccefa3bacbc34ba4d47ded

A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to __________.

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