Auxillary Flashcards
Q1
Describe the actions necessary to prepare the engine room for rough weather. (16)
- List eight actions to be taken by the Engineer Officer of the Watch to ensure the safe passage of the vessel through an area of heavy weather (8)
• Ensure that all bilge wells are empties sufficiently
Ensure that all watertight doors are closed
Ensure that all heavy items are securely stowed and lashed
Ensure that any chemicals, noxious liquids, flammable or otherwise are stored correctly and securely Stop all maintenance work, stow all tools and parts securely Ensure all tanks are sufficiently full
Sufficient water within boiler and boiler system to compensate for rolling
Sufficient lubricating oil within machinery sumps and service tanks
All tank vents on deck covered with water-proof hoods Ensure that all external openings are securely closed
All non-essential over-side discharges stopped and valves closed
Necessary actions to prepare engine room during rough weather.
Ensure that all bilge wells are emptied sufficiently
Ensure that all watertight doors are closed
Ensure that all heavy items are securely stowed and lashed
Ensure that any chemicals, noxious liquids, flammable or otherwise are stored correctly and securely
Drain water from the service tank/s
Stop all maintenance work and stow all tools and parts securely
Ensure all tanks are sufficiently full
Top up oil sump levels to prevent sensors from alarming
Sufficient water within the boiler and boiler system to compensate for rolling
Sufficient lubricating oil within machinery sumps and service tanks
All tank vents on the deck are covered with water-proof hoods
Ensure low sea chest is in operation
Put both steering gear motors online
Q2
State FOUR advantages and FOUR disadvantages of plate type heat exchangers. (16)
FOUR advantages of plate-type heat exchangers are:
Advantages
Simple maintenance and can be easily cleaned.
Capacity can be increased by introducing plates in pairs to the heat exchanger.
Simple and Compact
Turbulent flow help to reduce deposits which heat transfer
Disadvantages of plate-type heat exchanger:
The initial cost is high since titanium plates are expensive and titanium is a noble metal, other parts of the cooling system are susceptible to corrosion.
Use of special gaskets which can only be used at low temperatures and cannot be used with steam system.
Over-tightening of the clamping bolts results in increased pressure drop across the cooler.
Careful dismantling and assembling are to be done.
- State FOUR advantages and FOUR disadvantages of plate type heat exchangers.
Advantages:
-Both sides can be easily cleaned.
-Damaged plates can be easily replaced.
-Larger surface area for heat transfer.
-Smaller space required than shell and tube coolers
Disadvantages:
-Very expensive pate metal (usually made of titanium).
-Large surface area means lower pressure.
-Space is required to open up the cooler for cleaning.
-The flow resistance is larger than shell and tube.
Q3
With reference to the prevention of pollution at sea regulations, explain EACH of the following:
(a) Shipboard Oil Pollution Emergency Plans (SOPEP): (8)
(b) Oil Record Book. (8)
a) SOPEP is an approved code of practice, for the instruction of ships crew, officers and Masters of the methods to prevent the escape of oil and minimize the damaging effects caused by an escape of oil within the marine environment. SOPEP contains:
The safe and effective collection and recovery of escaped oil.
The procedures and practices to be followed to contain and prevent the spread of an oil spill.
The procedures and authorities should be informed including the details which should be given to them relating to the disaster.
(b) The purpose of the Oil Record Book is to record all transfers of oil and anything that may contain oil, on to and off the vessel. It is a legally required document and can be called upon in the case of legal action. It is filled out by the OOW, checked and signed by the chief engineer and counter-signed by the master.
Below are some entries that are to be made:
Record all fuel oil transfers.
To record all bilge water discharge, quantities and locations.
Disposal of oily residues (sludge)
Ballasting or cleaning of fuel oil tanks
Q4
(a) Describe the actions that the EOOW should take on finding that the temperature of the thrust block is rising above normal acceptable range. (6)
(b) Explain why the thrust block temperature is critical. (10)
16 marks
- a) Describe the actions that the EOOW should take on finding that the temperature of the thrust block is rising above the normal acceptable range.
Inform the Bridge and the Chief Engineer and raise the all engineers call alarm. Reduce the speed and slow down the main engine. If the temperature is above 90°C, shut down the main engine after consultation with the Bridge. Reducing the speed will reduce the amount of heat generated by friction. Check the lubrication and its cooling circuit.
b) Explain why the thrust block temperature is critical.
Melting of pads can cause critical damage of the engine and they will start losing their strength and vaporising above 120°C. Rise in temperature is very critical to the effective transmission of axial thrust power to the hull structure. Melting of the thrust block could cause potential damage to the intermediate shaft and main engine.
a) Normal operating temperature range of the thrust block is 55 - 70 °C. When the temperature reaches 90 °C, the engine will shut down by automation.
In the event of thrust block temperature rising above the normal range, Inform C/E
Inform the bridge about the situation and request a slowdown of the engine to prevent any further damage to the bearing.
Start the standby diesel generator (as the main engine slows down, this will cause auxiliary blowers to start)
Make sure the boiler is in auto
When it is safe, stop the engine and allow sufficient time to cool down
Open the inspection doors and inspect the thrust block for any signs of damage and lubrication condition.
(b)Thrust block bearings are made of white metals. White metals start losing their tensile strength about 120 °C, and starts melting about 180 °C. If thrust block temperature isn’t controlled by adequate cooling system such as L.O. or water, the damages could be extensive.
Q5
Describe the safety practices relating to EACH of the following:
(a) Grinding wheels; (4)
(b) Rotating machinery; (4)
(c) Safety clothing and footwear; (4)
(d) Prevention of skin reactions. (4)
- What are the appropriate regulations and/or safety practices relating to the following:
a) Grinding Wheels: Provision and Use of Work Equipment Regulations 1998 (PUWER) or Code of Safe working Practices 2015 (COSWP). Personnel working on-board with this equipment should be trained before being allowed to use wheels and appropriate eye/face protection be used at all times.
E.g. Abrasive wheels certificate.
b) Rotating Machinery: Provision and Use of Work Equipment Regulations 1998 (PUWER). Rotating
machinery should be guarded at all times, two separate light sources operating from two different
power sources is required.
1. What are the appropriate regulations and/or safety practices relating to the following:
a) Grinding Wheels: Provision and Use of Work Equipment Regulations 1998 (PUWER) or Code of
Safe working Practices 2015 (COSWP). Personnel working on-board with this equipment should be
trained before being allowed to use wheels and appropriate eye/face protection be used at all times.
E.g. Abrasive wheels certificate.
b) Rotating Machinery: Provision and Use of Work Equipment Regulations 1998 (PUWER). Rotating
machinery should be guarded at all times, two separate light sources operating from two different
power sources is required.
c) Safety Clothing & Footwear: Personal Protective Equipment at Work Regulations 1992 (PPE) or
Code of Safe working Practices 2015 (COSWP). Cotton boiler suits and steel toe cap boots should be
worn all the time. Ear defenders and hard hat should be worn in designated areas.
d) Prevention of skin reactions: Personal Protective Equipment at Work Regulations 1992 (PPE),
Code of Safe working Practices 2015 (COSWP) or Control of Substances Hazardous to Health
Regulations 2002 (COSHH). To have appropriate rubber gloves, eye protection, respirators. Ships
should have a chemical information database which lists all chemicals used on board and the risk associated with each chemical. Ensure the Material Safety Data Sheets (MSDS) are up to date.
c) Safety Clothing & Footwear: Personal Protective Equipment at Work Regulations 1992 (PPE) or
Code of Safe working Practices 2015 (COSWP). Cotton boiler suits and steel toe cap boots should be
worn all the time. Ear defenders and hard hat should be worn in designated areas.
d) Prevention of skin reactions: Personal Protective Equipment at Work Regulations 1992 (PPE),
Code of Safe working Practices 2015 (COSWP) or Control of Substances Hazardous to Health
Regulations 2002 (COSHH). To have appropriate rubber gloves, eye protection, respirators. Ships
should have a chemical information database which lists all chemicals used on board and the risk associated with each chemical. Ensure the Material Safety Data Sheets (MSDS) are up to date.
