23 Questions
Why is it important to record the temperature before and after the turbocharger in the engine log books?
To have an easy reference to check temperatures against engine operation and detect slow trends or sudden changes.
What does a defined temperature drop across a turbocharger indicate?
It indicates that energy is being used to spin the turbine and shows the turbocharger is functioning properly.
How do air inlet temperatures affect the combustion process and engine efficiency?
Air inlet temperatures directly impact the combustion process and engine efficiency.
What immediate action should be taken in the event of severe vibration from the main engine crankshaft?
The engine must be stopped.
Why should one not open any crankcase doors for at least 30 minutes in the event of severe vibration from the main engine crankshaft?
To allow time for components to cool.
What immediate action should be taken in the event of a high cooling water temperature alarm on the generator engine?
As a minimum, there should be at least 1x additional generator onboard.
Why is it important to record the LO sump level in engine log books?
To provide an early warning to the engineer in case of slow trending or sudden changes.
What could be a possible cause if the LO sump level is dropping?
The engine burning oil (piston rings, valve guide seals) or physical leaks in the system.
Explain the significance of recording Cooling water inlet temperature in engine log books.
To monitor the engine's cooling efficiency and detect any abnormalities.
What could a high Cooling water inlet temperature indicate?
Possible cooler leaks when the engine is shut down or internal leaks through cylinder head leaks or fuel dilution.
Why is it important to monitor Inlet manifold air pressure?
To ensure proper air intake for combustion and engine performance.
What could cause abnormal readings in Inlet manifold air pressure?
Issues like leaks in the intake system or problems with air filters.
What are the potential consequences of not addressing low LO sump levels?
L.O. starvation and possible engine shutdown, leading to substantial damage.
Explain the factors to consider when planning a voyage in terms of fuel.
Distance required to be covered to the next port, speed required by the owners, time of year and weather conditions, ullages and unpumpables in tanks, reserve allowance of three steaming days or 15% extra for deviations.
What factors should be taken into account when planning a voyage regarding lubricating oil?
Calculate lubricating oil stocks based on average daily consumption for each grade of oil carried, add a contingency allowance of 15%, ensure enough oil for a complete oil change in at least one machine, and consider availability of replacement stocks at the next port.
Discuss the factors to consider when planning a voyage in relation to fresh water.
Calculate fresh water needs based on average daily consumption, add allowances for losses and contingencies, consider replenishment of tanks with made water on passage, and account for limitations in water production in inshore waters.
Describe the action to be taken if microbial contamination is found to be the source of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes.
The entire fuel system needs to be discharged, tanks and piping systems cleaned, and the fuel system treated with a biocide with repeated flushes and checks until the contamination is removed.
What steps should be taken if water content is found to be the cause of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes?
The bunkers will need to be discharged and the water content tested ahead of notifying DPA and bunker agent. If the bunkers are the only ones available, they must be purified until at a satisfactory state.
In case of incorrect viscosity being the cause of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes, what action should be taken?
The bunkers will need to be discharged, and the correct viscosity fuel must be bunkered to resolve the issue.
If insufficient fuel pressure is determined to be the source of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes, what should be done?
The fuel pressure needs to be checked and maintained at the required level to ensure proper engine function.
Explain the necessary steps if contaminated bunkers are identified as the cause of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes.
Isolate the contaminated bunkers, test for water content, discharge the bunkers if needed, and purify them until they reach a satisfactory state.
What actions should be taken if the cause of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes is due to incorrect temperature conditions?
Ensure the temperature conditions are within the specified range for the engine to operate effectively.
If air ingress is identified as the source of an engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes, what should be done?
Address the air ingress issue to prevent further complications and ensure proper fuel combustion.
Understand the reasons for recording temperature values before and after the turbocharger, and inlet air temperatures in engine log books. Learn about the effects of temperatures outside normal parameters on the engine. Explore how incorrect valve timing, fuel properties, or turbocharger faults can affect engine performance.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
