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Questions and Answers
What is the main advantage of using tie rods in an engine?
What is the main advantage of using tie rods in an engine?
Which ISO standard governs the specifications for the supply of Residual Marine Fuels onboard merchant ships?
Which ISO standard governs the specifications for the supply of Residual Marine Fuels onboard merchant ships?
What does crank web deflection readings give a positive indication of?
What does crank web deflection readings give a positive indication of?
In what situation would centrifugal compressors be typically used?
In what situation would centrifugal compressors be typically used?
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What component of a 2-stroke marine diesel engine is responsible for scavenging the exhaust gases from the cylinder?
What component of a 2-stroke marine diesel engine is responsible for scavenging the exhaust gases from the cylinder?
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What is a common purpose of using tie rods in a marine engine?
What is a common purpose of using tie rods in a marine engine?
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What can happen as a result of a scavenge fire in slow speed engines?
What can happen as a result of a scavenge fire in slow speed engines?
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What is the function of the top o-ring provided on the liner of a two-stroke engine?
What is the function of the top o-ring provided on the liner of a two-stroke engine?
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When can a crankcase explosion occur if there is an oil mist concentration and a hot spot inside the crankcase?
When can a crankcase explosion occur if there is an oil mist concentration and a hot spot inside the crankcase?
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For what reason are some 4-stroke engines fitted with a rotorcap on the cylinder head valves?
For what reason are some 4-stroke engines fitted with a rotorcap on the cylinder head valves?
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To reduce cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil, what can be done?
To reduce cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil, what can be done?
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When a diesel engine suddenly stops, what could be potential reasons?
When a diesel engine suddenly stops, what could be potential reasons?
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In a 4-stroke auxiliary engine, how is the muffling of exhaust gas noise typically achieved?
In a 4-stroke auxiliary engine, how is the muffling of exhaust gas noise typically achieved?
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What action is necessary to reduce sulfur corrosion of main engine components?
What action is necessary to reduce sulfur corrosion of main engine components?
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In an emergency running condition of the main engine, which alarm cannot be bypassed?
In an emergency running condition of the main engine, which alarm cannot be bypassed?
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What can contribute to cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil?
What can contribute to cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil?
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Study Notes
Tie Rods
- Tie rods increase stiffness and reduce stress on the crankshaft by connecting the main bearings.
ISO Standard for Residual Marine Fuels
- ISO 8217 governs the specifications for the supply of Residual Marine Fuels onboard merchant ships
Crank Web Deflection Readings
- Crank web deflection readings indicate crankshaft wear and tear, potentially revealing fatigue or damage.
Centrifugal Compressors
- Centrifugal compressors are typically used in applications requiring high flow rates and moderate pressure ratios, like gas turbines and large industrial processes.
Scavenging in 2-Stroke Engines
- The scavenge air receiver is responsible for delivering fresh air into the cylinder of a 2-stroke marine diesel engine, aiding in the expulsion of exhaust gases.
Purpose of Tie Rods in Marine Engines
- Tie rods are commonly used in marine engines to connect the engine's main bearings to the engine frame, providing structural integrity, distributing load, and preventing potential distortion.
Scavenge Fire Consequences
- Scavenge fires in slow-speed engines can result in severe damage to engine components, like pistons and cylinder liners, as well as potential explosions and fire hazards.
Top O-Ring Function
- The top o-ring on a two-stroke engine liner helps seal the combustion chamber, preventing blow-by gases from escaping and assuring lubrication oil is retained within the crankcase.
Crankcase Explosion
- Crankcase explosions can occur when an oil mist concentration combines with a hot spot in the crankcase, leading to ignition and rapid pressure buildup.
Rotorcap Function in 4-Stroke Engines
- Some 4-stroke engines use rotorcaps on cylinder head valves to improve sealing and reduce wear, enabling smooth valve operation and preventing leaks.
Reducing Cylinder Liner Corrosion
- To reduce cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil, consider adjusting fuel oil properties, using corrosion inhibitors, and implementing proper operating techniques to minimize corrosive wear.
Reasons for Engine Sudden Stop
- Potential reasons for a diesel engine suddenly stopping include fuel system issues, air intake problems, lubrication failure, cooling system malfunctions, or engine control system problems.
Exhaust Muffling in 4-Stroke Auxiliary Engines
- Exhaust gas noise in 4-stroke auxiliary engines is typically muffled by incorporating silencers or resonators in the exhaust system.
Reducing Sulfur Corrosion
- Techniques to reduce sulfur corrosion of main engine components include using low sulfur fuel oil, applying corrosion inhibitors, and maintaining proper operating procedures to minimize corrosive wear.
Unbypassable Alarm in Emergency Running
- In an emergency running condition of the main engine, the low lube oil pressure alarm cannot be bypassed due to its critical function.
Cold Corrosion Factors
- Cold corrosion of Main Engine cylinder liners when using high sulfur fuel oil can be attributed to the presence of corrosive compounds like sulfides and the formation of acid condensation.
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Test your knowledge with engineering-related quiz questions on topics such as steam valve operation, cold corrosion reduction in main engine cylinder liners, and alarms bypass during emergency conditions.
