You are analyzing the data used for trend...

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Question 1 of 2066636eef28f7522a1c51f6aa

You are analyzing the data used for trend analysis for one of the main propulsion diesel engines on the OSV to which you are assigned. The cylinder exhaust temperature of one of the cylinders is significantly lower than the others. When analyzing compression and firing pressure data, however, the numbers are within the normal range for this particular cylinder. What condition would produce these results?

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Question 1 of 20

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🔍 Key Concepts

• Relationship between exhaust temperature and combustion quality • How air supply restrictions vs. fuel or exhaust problems affect cylinder temperatures • Why normal compression and firing pressure narrows down the likely cause

💭 Think About

• If compression and firing pressures look normal, which problems are you more likely to rule out first? • Which of these options would cause the combustion process itself to be weak, and which would mainly affect the measurement of temperature or the flow of air or exhaust? • Think about whether restricted air supply tends to make exhaust gases hotter or cooler for a given fuel amount.

✅ Before You Answer

• Identify which choices would MOST likely change compression and firing pressure if they were serious enough to show up in exhaust temperature. • Decide whether a sensor/probe issue could produce a low reading even when the cylinder is actually operating normally. • Consider whether leaking valves (fuel or exhaust) would usually increase or decrease measured exhaust temperature, and whether that would also show up in pressure data.

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