A 16 cylinder main propulsion diesel engine...

Question 1 / 205eccefa3bacbc34ba4d47df7

Question 1 of 205eccefa3bacbc34ba4d47df7

A 16 cylinder main propulsion diesel engine is operating at 95% of full load. No. 7 cylinder is in alarm condition and indicating 1000°F exhaust temperature. All fuel racks are at 21-22 mm except No. 7 which is at 18mm. A new fuel injector nozzle for No. 7 cylinder had been recently installed. Which of the listed actions should be carried out NEXT?

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🔍 Key Concepts

• High exhaust temperature on a single cylinder relative to others • Effect of fuel rack position and fuel quantity on cylinder temperature • Recent maintenance: new fuel injector nozzle and how installation/adjustment can affect operation

💭 Think About

• Compare the fuel rack setting on No. 7 to the others: does more or less fuel normally raise exhaust temperature? What does that suggest about the problem source? • Think about which listed action can be done quickly, without major disassembly, and is most directly related to recent changes made to No. 7 cylinder. • Ask yourself whether this is more likely a combustion/fuel issue or a mechanical (rings/valves/compression) issue, based on the symptoms given.

✅ Before You Answer

• Identify which choice is least invasive and most directly connected to the fuel control and governor system. • Consider that compression and piston ring issues usually require stopping and opening the engine; decide if that matches the "NEXT" step in an alarm at 95% load. • Before choosing, verify which option would help you confirm whether the cylinder is getting the correct amount of fuel after the new injector installation.

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Question 1 of 20

Take compression pressure readings on No. 7 cylinder.

Pull No. 7 cylinder piston and examine the rings.

Examine the governor linkage for binding.

Check the intake manifold pressure for evidence of burned intake valves.

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Question 1 / 205eccefa3bacbc34ba4d47df7

Question 1 of 205eccefa3bacbc34ba4d47df7

Back

Question 1 of 20

5eccefa3bacbc34ba4d47df7

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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