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What is the meaning of the diesel engine term 'overlap'?
What is the meaning of the diesel engine term 'overlap'?
Overlap refers to the period during which both the intake and exhaust valves are open at the same time, allowing a small amount of the fresh intake charge to escape back into the exhaust system.
What is the purpose of piston ring end clearance?
What is the purpose of piston ring end clearance?
Piston ring end clearance is necessary to allow for thermal expansion of the rings during engine operation, preventing the rings from binding in the ring grooves.
Describe the procedure for manually testing the set points on a diesel engine lubricating oil low pressure alarm and shut down using a pressure calibrator.
Describe the procedure for manually testing the set points on a diesel engine lubricating oil low pressure alarm and shut down using a pressure calibrator.
To manually test the set points on a diesel engine lubricating oil low pressure alarm and shut down using a pressure calibrator, the procedure would involve:1. Isolating the oil pressure sensor from the engine's lubricating oil system.2. Connecting a pressure calibrator to the sensor.3. Incrementally decreasing the pressure while monitoring the alarm and shut down set points.4. Verifying that the alarm activates at the correct low pressure set point, and the engine shuts down at the appropriate lower pressure set point.
Sketch and describe a typical distillate fuel supply system for a diesel engine, including all the safety devices.
Sketch and describe a typical distillate fuel supply system for a diesel engine, including all the safety devices.
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What are three desirable properties of piston rings?
What are three desirable properties of piston rings?
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What are the common materials used for piston rings?
What are the common materials used for piston rings?
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Sketch three different types of piston ring ends.
Sketch three different types of piston ring ends.
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What is the meaning of cetane number?
What is the meaning of cetane number?
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Define calorific value.
Define calorific value.
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Explain density.
Explain density.
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What does viscosity mean?
What does viscosity mean?
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Describe a coalescer type distillate fuel oil filter.
Describe a coalescer type distillate fuel oil filter.
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How is large medium speed diesel engine lubricating oil maintained in optimal condition?
How is large medium speed diesel engine lubricating oil maintained in optimal condition?
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How can leaking cylinder air start valves be detected while the engine is running?
How can leaking cylinder air start valves be detected while the engine is running?
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What is the procedure when leaking cylinder air start valves are discovered?
What is the procedure when leaking cylinder air start valves are discovered?
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List four possible causes of leaking cylinder air start valves.
List four possible causes of leaking cylinder air start valves.
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What precautions should be taken before removing a diesel engine cylinder head?
What precautions should be taken before removing a diesel engine cylinder head?
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Explain the purpose of the magnetic filter in the lubricating oil system of reduction gearing.
Explain the purpose of the magnetic filter in the lubricating oil system of reduction gearing.
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Why is the surface finish of gear teeth important in reduction gearing?
Why is the surface finish of gear teeth important in reduction gearing?
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State why a flexible coupling is fitted between the engine and gearbox in reduction gearing.
State why a flexible coupling is fitted between the engine and gearbox in reduction gearing.
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