Engine Log Books: Recording Inlet Manifold Air Pressure

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Questions and Answers

What are the procedures to be followed by the Watchkeeping engineer officer in case of a fire in the machinery space?

Find – Inform – Restrict – Extinguish

What is the key safety consideration for dealing with a fire in the machinery space?

Not to place yourself or other personnel in danger

What should be done first if a flooding of the machinery space occurs?

Inform the bridge

What action should be taken with the bilge pumps in case of flooding in the machinery space?

All available bilge pumps should be brought into action Signup and view all the answers

What is the primary concern when flooding occurs in the machinery space?

Stability of the vessel and protection of the electrical supply Signup and view all the answers

Why is it important to close all open watertight doors and accesses to the flooded compartment?

To prevent flooding into adjacent compartments Signup and view all the answers

When should the emergency bilge suction be utilized?

If necessary Signup and view all the answers

Why is it important to record Inlet manifold air pressure in the engine log books?

To provide early warning to the engineer in case of slow trending or sudden changes. Signup and view all the answers

What could be a possible cause if the Inlet manifold air pressure readings are outside the normal parameters?

Possible causes could include system leaks affecting turbocharger pressure, choked intercooler, or poor combustion air supply. Signup and view all the answers

How does loss of pressure affect combustion in an engine?

Loss of pressure results in poor air flow, which can lead to poor combustion, higher combustion temperatures, and reduced cooling of exhaust valves. Signup and view all the answers

Explain the relationship between turbocharger pressure and intercooler pressure.

Higher turbocharger pressures with low pressure post intercooler could indicate a choked intercooler. Signup and view all the answers

How do log entries help in fault finding related to pressure data?

Log entries help build a fault finding picture by tracking pressure trends and identifying sudden changes. Signup and view all the answers

Why is maintaining the required pressure from the turbocharger important?

Maintaining turbocharger pressure is essential for ensuring proper air flow and combustion in the engine. Signup and view all the answers

What effect can system leaks have on turbocharger pressure?

System leaks can result in a loss of pressure affecting turbocharger performance. Signup and view all the answers

What is the first step to be taken when dealing with contaminated bunkers?

The contaminated bunkers must be isolated and if possible tested for water content ahead of notifying DPA and bunker agent. Signup and view all the answers

What is the next step to be taken after isolating the contaminated bunkers?

Bunkers will need to be discharged. Signup and view all the answers

What should be done if the contaminated bunkers are the only ones available?

If the bunkers are the only ones available then they must be purified until they are at a satisfactory state – proceed with caution to the nearest port / safe haven. Signup and view all the answers

What is the likely cause of the engine losing power and misfiring after bunkering marine gas oil for main propulsion purposes?

Possible microbial contamination. Signup and view all the answers

What is the recommended action to be taken if microbial contamination is found to be the cause of the engine losing power and misfiring?

If microbes are the cause then the entire fuel system is likely to have already been contaminated as we know the engine is misfiring. The entire fuel will need to be discharged, tanks and piping systems cleaned and the fuel system will need to be treated with a biocide with repeated flushes and checks until the contamination is removed. Signup and view all the answers

What is the first step to be taken when dealing with a loss of engine power and misfiring after bunkering marine gas oil?

The contaminated bunkers must be isolated and if possible tested for water content ahead of notifying DPA and bunker agent. Signup and view all the answers

What is the recommended course of action if the contaminated bunkers are the only ones available?

What are the potential consequences of sea water deposits and corrosion on a vessel?

Deposits from sea water and corrosion can lead to hot spots where cooling water cannot remove the heat as quickly as it should, leading to overheating and structural failure. Signup and view all the answers

How can water contamination affect lub oils and their performance?

Water contamination may drastically reduce the oils' ability to lubricate, form hydrodynamic wedges (in bearings), and may emulsify, all of which can lead to component failure. Signup and view all the answers

How can water lead to corrosion, particularly in bearings, and what is the potential consequence?

Water can lead to corrosion, specifically in bearings, where failure becomes a very real option. Signup and view all the answers

What is the purpose of carefully designing lub oils for their applications and environments?

Lub oils are very carefully designed for their applications and their environments to ensure proper lubrication and performance. Signup and view all the answers

What are some common log entries that do not involve machinery temperatures, pressures, or other parameters?

Common log entries, excluding machinery temperatures, pressures and other parameters, include tank soundings, fuel and lubricating consumptions, vessel's state, arrival/departure stand-by times, and key machinery operations. Signup and view all the answers

Why is it important to make an additional note when machinery is topped up with lubricants?

An additional note is made when machinery is topped up with lubricants to record when and how much was added, which helps with trending consumption. Signup and view all the answers

What is the significance of recording key machinery operations, such as making ready and testing main engines for departure?

Recording key machinery operations, like making ready and testing main engines for departure, is important for documenting the vessel's operational readiness and activities. Signup and view all the answers

Explain the importance of checking the standby pumps for the cooling system during the pre-UMS checks.

Checking the standby pumps ensures redundancy and automatic operation in case of failure of the primary cooling pump, which is crucial for maintaining proper cooling and preventing machinery overheating during UMS operation. Signup and view all the answers

Why is it essential to check for water content in the fuel settling and service tanks before switching to UMS?

Checking for water content in the fuel tanks is crucial to prevent water contamination in the fuel supply, which could lead to engine issues, poor combustion, or even engine failure during UMS operation when the machinery space is unattended. Signup and view all the answers

Describe the importance of checking the fire detection systems before switching to UMS, and the contingency plan if these systems are not fully operational.

Checking the fire detection systems is crucial as a fire in the unattended machinery space during UMS could have catastrophic consequences. If the systems are not fully operational, a fire watch system with personnel physically monitoring the space must be implemented to mitigate the risk. Signup and view all the answers

Explain the significance of checking the air receivers and compressors during the pre-UMS checks, and the potential consequences of not doing so.

Checking the air receivers and compressors ensures a reliable supply of compressed air, which is essential for various machinery operations and control systems. Failure to do so could lead to air system failures, potentially causing machinery issues or loss of control during UMS operation. Signup and view all the answers

Discuss the importance of checking for leaks in the bilges and the potential risks associated with undetected leaks during UMS operation.

Checking for leaks in the bilges is crucial to ensure there are no ongoing or potential flooding situations. Undetected leaks during UMS operation could lead to progressive flooding, potentially causing machinery failures, stability issues, or even sinking of the vessel if left unchecked. Signup and view all the answers

Explain the importance of conducting a full set of machinery rounds before switching to UMS, and the potential risks of not doing so.

Conducting a full set of machinery rounds before switching to UMS is crucial to identify any potential issues or abnormalities with the equipment. Failing to do so could lead to undetected problems escalating during UMS operation, potentially causing machinery failures or breakdowns. Signup and view all the answers

Discuss the significance of checking the purifier operation and coalescer filters during the pre-UMS checks, and the potential consequences of not doing so.

Checking the purifier operation and coalescer filters ensures proper fuel treatment and removal of contaminants before switching to UMS. Failure to do so could lead to fuel contamination, potentially causing engine issues, poor combustion, or even engine failure during unattended operation. Signup and view all the answers

Explain the importance of verifying the correct operation of the cooling system's header tank levels during the pre-UMS checks.

Verifying the correct header tank levels for the cooling system ensures sufficient coolant supply and proper system pressurization. Improper levels could lead to air locks, cavitation, or insufficient cooling, potentially causing machinery overheating or failures during UMS operation. Signup and view all the answers

Discuss the significance of checking the air compressor running hours during the pre-UMS checks, and the potential risks associated with not doing so.

Checking the air compressor running hours is important to ensure timely maintenance and prevent unexpected failures during UMS operation. Neglecting this check could lead to compressor breakdowns, resulting in a loss of compressed air supply and potential machinery control issues or failures. Signup and view all the answers

Explain the importance of ensuring sufficient fuel reserves in the settling and service tanks before switching to UMS, and the potential risks associated with inadequate fuel reserves.

Ensuring sufficient fuel reserves in the settling and service tanks is crucial to maintain uninterrupted machinery operation during the UMS period. Inadequate fuel reserves could lead to fuel starvation, causing machinery shutdowns or failures, potentially stranding the vessel or compromising its safety. Signup and view all the answers

Study Notes

Contaminated Bunkers

Bunkers must be isolated and tested for water content before notifying DPA and bunker agent
If bunkers are the only ones available, they must be purified until they are satisfactory
Discharge bunkers and clean tanks and piping systems if contaminated with microbes

Engine Losing Power and Misfiring

Possible cause: microbial contamination of fuel system
Solution: discharge fuel, clean and treat fuel system with biocide, and perform repeated flushes and checks

Fire in Machinery Space

Procedures to follow: Find, Inform, Restrict, Extinguish
Ensure safety, identify seat of fire, raise alarm, restrict fire from combustible materials and air, and attempt to extinguish using appropriate fire-fighting media

Flooding of Machinery Space

Primary concerns: stability of vessel and protection of electrical supply
Inform bridge, activate bilge pumps, close watertight doors, and utilise emergency bilge suction if necessary

Inlet Manifold Air Pressure

Log entries help build fault-finding picture, considering turbocharger and intercooler data
Check for system leaks, intercooler blockage, and poor combustion air supply, which can lead to poor scavenging, poor combustion, and loss of efficiency and power

Log Entries

Common log entries include:
- Tank soundings
- Fuel and lubrication consumptions
- Vessel's state (at sea, on passage, etc.)
- Arrival and departure stand-by times
- Machinery operations and testing
- Cooling systems checks
- Bilge conditions
- Machinery condition
- Fuel systems checks (settling tanks, service tanks, and purifiers)

UMS Machinery Space Preparation

Checks and procedures to carry out before switching to UMS include:
- Air systems checks (receivers, drains, and compressor sumps)
- Fire detection systems checks (full operating order, otherwise implement fire watch system)

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Description

Understand the importance of recording inlet manifold air pressure in engine log books, and learn to explain the reasons for doing so. Explore possible causes when the readings are outside normal parameters to provide an early warning to the engineer.