Persistent knocking in one cylinder of an...

Question 1 / 270705eccefa1bacbc34ba4d475c2

Question 1 of 270705eccefa1bacbc34ba4d475c2

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by __________.

Question 1 of 27070

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by __________.

🔍 Key Concepts

• Diesel fuel cetane number and how it affects ignition delay and knocking across cylinders • Differences between combustion-related knock and mechanical knock in a diesel engine • How a fault in one cylinder only narrows down the likely cause compared to faults affecting the whole engine

💭 Think About

• Ask yourself: Would low cetane fuel usually affect just one cylinder, or all cylinders supplied by the same fuel system? • Consider which of the listed faults would create a localized, repeating knock tied to a single piston’s motion through the stroke. • Think about which components move with each individual piston versus which parts are common to the whole engine (like flywheel and bedplate).

✅ Before You Answer

• Verify whether fuel quality issues (like low cetane) would typically cause uniform or localized symptoms in a multi‑cylinder engine. • Check which items in the choices are shared by all cylinders (common components) versus attached to or moving with only one cylinder’s piston/rod assembly. • Consider which defect would produce a persistent, rhythmic knock in time with that one cylinder’s firing or motion.

Question 1 of 27070

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by __________.

using fuel oil with low cetane number

a badly worn piston pin

a loose flywheel key

a loose bed plate bolt

Question 1 / 270705eccefa1bacbc34ba4d475c2

Question 1 of 270705eccefa1bacbc34ba4d475c2

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by __________.

Back

Question 1 of 27070

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by __________.