Sticking fuel linkage. The shut down panel would be examined, and if a trip is active the cause would be investigated and system made operational. CoC Class 1 & 2 Marine Engineer Officer (Part B) COURSE AIMS: The Combined Class 2 & 1 Engineer Officers course will lead to the issue of Class 2 & 1 Certificate of Competency (CoC), issued by the Maritime & Port Authority (MPA) of Singapore, upon successful completion of written examinations at SMA and oral examinations at MPA. This vacuum causes the water plug to be drawn into the closed end of the pipe with increasing velocity producing high impact forces on the pipework. This impact force can be high enough to rupture the pipeline. Excessive crankshaft bending due to a main bearing failure, which increases the crankshaft bending stresses. This will occur when the lube oil in the crankcase is heated by a “hot spot” and lube oil coming into contact with this will be evaporated. Frictional grip is the usual method of crankshaft construction for built-up crankshaft. The normal effect is for the oil to reduce in alkalinity away from the injection point, thus if the oil becomes acidic then high corrosive wear rates will result. These doors will open when the pressure rises above 0.02 – 0.1 bar, and prevent the over-pressure of the engine structure. What is the Marine Engineer 4 th class exam procedure like, and do you have any example questions? Class IV Level ; New Management Level. Shirts & Trousers; Marine Merchant Navy Epaulettes. Do give it a shot and see if you have what it takes to tackle the upcoming engineering exam finals. These can be reduced by ensuring a smooth surface finish to all area where high stress is applied especially in the web/pin radii area, These should be minimised whenever possible, and the oil hole opening have wide and smooth radii. Sample Question. Marine Boilers Class 2 CoC Uk Oral Exam Questions. When the bridge telegraph is moved to an astern direction, the air start and fuel cams Loves to brag about the places that i have been too. The crack progress is shown as smooth, rippled formation known as striations or beach marks, whilst the sudden failure is a classic brittle fracture with rough appearance. ? Hold a Marine engine driver grade 1 near coastal, Engineer watchkeeper or workshop skill equivalent qualification. marine-engineer-class-2-exam-questions 1/5 PDF Drive - Search and download PDF files for free. Questions and Answers on Diesel Engines Click on the links below to download the file. The fuel linkage should admit a “starting level” of fuel after the engine start sequence has been completed. As the explosion is an uncontrolled event, then great care must be taken to ensure the safety of the engineers within the engine room. This will cause uneven bore wear rates, with heavy wear in the areas furthest away from the oil injection points. Filter. Writing is my hobby, and loves to write about what i like. Previous Certificate & Seagoing Service:meet the requirements for certification as an officer in charge of an engineering watch and have not less than 36 months approved seagoing service, of which not less than 12 months shall have been served as an engineer officer in a position of responsibility while qualified to serve as second engineer officer. The fuel system would be investigated, and all valves checked to be opened, and all booster and supply pumps checked for running. One of the common areas of overheating is the various bearings within the crankcase. Fatigue failure is identified as starting at a stress raiser or defect, then the crack generates through the material before causing sudden failure. MEO Class 1; MEO Class 2; MEO Class 4; MMD – Nautical. All Discussions only Photos only Videos only Links only Polls only Events only. - Observation and Spark Test. slow ahead, full ahead, etc. If there are any defects at this joint, then the resulting stress concentration would trigger a crack and possible shaft failure. Marine Uniforms. Questions and Answers on Diesel Engines 1, Preparation for Arrival in Port Checklist, Fuel Injection Arrangement on Large Two Stroke Engines, Maintenance of Chain Drive – Marine Diesel Engines, Operation of Freshwater Generator with Jacket Cooling Water, Starting Air Line Explosion on Ships – Marine Engineering, International Shore Connection for Fire Fighting, Torsional Vibration in Main Propulsion Plant of a Ship, MEO Orals on Marine Electro Technology Function 5- Part 8, Describe how a fatigue crack may be initiated, Describe the events leading to a crankcase explosion on a main engine, Explain how a fatigue failure is identified, How a detuner or torsional vibration damper can reduce the effects of torsional vibration, how the risk of water hammer may be avoided, problems associated with effective lubrication of the liner and piston assembly, State how overheating might be indicated other than by mist detector, State how the severity of a crankcase explosion is limited, wear down in main bearings is critical to the condition of the crankshaft, What are the causes and effects of torsional vibrations in crankshaft, What is meant by the term critical speed and why it can be a problem on ships, Why oil holes are given large fillets in crankpins and journals, why the testing and treatment of boiler water is essential, Why total reliance is placed on frictional grip in conventional built up crankshaft on main engine, Measuring Fuel pump Lead on Marine Auxiliary Engine, Operation and Maintenance of Eductor on Ships, Insulation Resistance Tests of High Voltage Equipment, The level of chlorides is within acceptable limits (below 200 ppm) to prevent hard scale and pitting, The reserve of boiler chemicals within the boiler water is accepted (P Alk above 100 ppm, and Phosphate above 20ppm), Alkalinity reserve against boiler water space corrosion, Enough coagulant levels exist to minimise sludge build-up within the boiler, The strength of the boiler drum is maintained, Reducing the steam load and demand on the auxiliary boiler to reduce firing temperatures, Ensuring hotwell feed temperatures are at the recommended 95°C to minimise oxygen levels in the feed, Minimise blowdown of boiler water, whilst ensuring chloride level is not excessive, to avoid loss of the boiler chemicals, High combustion pressures, increasing the bending stress applied to each crankshaft throw. The causes are insufficient oil and/or excessive cylinder pressures causes heavy ring/liner contact forces. Experience 1969 - 2020 in the marine industry Marine Engineers and Superintendents Technical Support The physical movement of the fuel linkage would be checked, and any mechanical friction reduced by lubrication. Academic Papers; Uniforms. All Time Today Last Week Last Month. The steam condenses producing both water, and a vacuum (when the water seals the pipeline from the steam supply). A Guide to Understanding New Designations in AWS Filler Metal Classifications. The rapid pressure rise within the crankcase can cause the engine structure to be blown apart, causing physical damage, and the resultant flame travelling across the engine room space causing personnel injury. We will put them in a brochure with a link to you. Fatigue strength is reduced when tensile stress are present, so the radii areas are often cold rolled to ensure that the fatigue strength in these areas are increased. The detuner will change the stiffness of the shaft and hence the natural frequency, thus separating the excitation frequency from the component’s natural frequency, whereas the damper will absorb the vibration within the shaft, reducing the effects of the torsional vibration. 1. The size of this radius will significantly influence the local stress levels, and should be closely monitored during crankshaft construction, and possible crankpin surface repairs by grinding. Academic Papers; Uniforms. Thanks with best regards to you. Target Consumer. All air compressors would be started, and air usage restricted to engine manoeuvring only. How to Identify Metals in Engine Room? The atmosphere inside a crankcase is stable and will not allow combustion or an explosion to occur as there is no ignition or fuel source. Time. Water hammer is avoided by slowly admitting the steam into the cold line, and draining/venting the cold line to minimise the vacuum forming, and assist in draining the condensate. Fatigue cracking occurs when the primary cause of crack propagation is due to the fluctuating nature of the stress applied to the component. The critical speed of a shaft occurs when the shaft rotational speed is at or close to resonant conditions. In modern marine 2-stroke diesel engines, _____ is sometimes used as a coating on the underside of the exhaust valve disc, to reduce the rate of hot corrosion. Syllabus. Stop the LO circulating pump. We use cookies to ensure that we give you the best experience on our website. Education & Training:have complete… However in the real situation the following problems occur: Cloverleafing will be caused when the supply of lube oil is not uniform around the radial bore of the liner. 2. A. monel These levels of stress could even cause crankshaft failure. ASM / Masters; UK MCA – Engineering. Filtered by: Clear All. Such levels of stress are possible when the stress is concentrated at section changes. A Guide to Welding Electrodes on Ships - Part 1. Air start distributor not reversing. In this condition the torsional vibration of the shaft increases greatly, and will impose very high shear stress on the crankshaft. The evaporated oil then rises within the crankcase, and then condenses in a cooler part of the crankcase. Marine Engineer Class 2 Exam Questions Author: programafaixalivre.org.br-2021-01-11T00:00:00+00:01 Subject: Marine Engineer Class 2 Exam Questions Keywords: Marine, Engineer, Class, 2, Exam, Questions Created Date: 1/11/2021 3:16:03 PM Question and Answer for Oral Exam, Part – 1 November 16, 2014; Marine Engineer Officer Class- 1 (Unlimited) CoC Oral Exam Preparatory Course Syllabus as per IMO Model Course 7.02 November 16, 2014; Marine Engineer Officer Class-2 & 1 (Unlimited) CoC Exam Preparatory Course Syllabus as per IMO Model Course 7.02 November 16, 2014 The quantity of fuel admitted will depend on the position of the telegraph handle, i.e. You could not unaided going following ebook accretion or library or borrowing from your connections to open them. Lukeas2016. The valves from the air receiver would be checked, and opened if found shut. Your email address will not be published. Uniforms for India. Extra First Class Part B Question Papers: Extra First Class Part A Question Papers: MEO CL-I WRITTEN EXAM QUESTIONS: MEO Oral Questions Part1: MEO Mgmt. Harsha Sharma . When the main bearings wear down, the alignment of the crankshaft to the propeller shaft will change. The following brochures contain oral questions. This torque variation is further compounded by the arrangement of the firing order of the crankshaft. Meet medical, eyesight, sea service and course requirements. The stress can be increased locally by a surface defect, or even an extreme stress concentration caused by high applied stress. Check for any shut-downs still active. The gear would be removed if found engaged. new posts. Defect growth from a small surface defect into a crack that propagates through the shaft material require high levels of stress. Questions and Answers for Marine Engineers help to pass exam. Marine Engineer Class 1 – Guidance for certificate of competency Page 2 of 16 . Love Dogs a lot. The answer below is no longer valid. Questions: 20 | Attempts: 330 | Last updated: Aug 6, 2019 . The doors also perform the added function of preventing fresh air ingress into the crankcase where hot burning gases are present, by the quick closing action of the relief door. If the engine fails to fire on fuel the following points would be investigated, and remedial action taken. Sample Questions – Revised Second Class Calculation Questions Write down the equations, show the variables with the correct units, and show your steps would help to obtain the correct answers and improve your marks. Shirts & Trousers; Marine Merchant Navy Epaulettes. Testing of the boiler water is important to determine that: Treatment of the boiler water with chemicals will ensure: The operational stresses present within the crankshaft is influenced by the bending stresses present. They seems simple. I sail with one of the leading shipping companies as engine officer. Air start valve not opening. Would love to talk to different people out there. Once the air start is reversed, the engine will start as detailed for the ahead start. This will admit starting air to the engine. This could indicate that the air compressors are either not working or excess air is being used. Question and Answer for Oral Exam, Part – 1 November 16, 2014; Marine Engineer Officer Class- 1 (Unlimited) CoC Oral Exam Preparatory Course Syllabus as per IMO Model Course 7.02 November 16, 2014; Marine Engineer Officer Class-2 & 1 (Unlimited) CoC Exam Preparatory Course Syllabus as per IMO Model Course 7.02 November 16, 2014 No air pressure at engine manifold. This will be an additional advertisement for you as an engineer. Previous template Next. MEO Class 1; MEO Class 2; MEO Class 4; MMD – Nautical. Move away from the crankcase doors immediately, Reduce speed to slow, and ask the bridge to stop, When the engine has stopped, close the fuel supply, Lock engine room entry doors and keep away from them, Do not open the crankcase for at least 20 minutes after stopping the engine, and ensure that the oil mist detector alarm (or bearing temperature monitor) has reset. marine engineer class 2 exam questions is available in our book collection an online access to it is set as public so you can download it instantly. Collapse. State how overheating might be indicated other than by mist detector ? Locate the “hot spot” (source of the oil overheating), The oil is injected at defined points which can lead to an oversupply at the feed points, and an under supply away from these points, The residual fuel normally used contains acids and abrasives that will reduce the lubrication properties of the oil, The normal operation of the piston will cause the piston movement to stop at top dead centre, causing any oil pressure developed between the ring and liner to collapse, The high temperatures present at top dead centre reduce the effectiveness of the lubricant. Posts; Latest Activity . Very very good feed back I am receiving for both my EK M, written and Oral examinations of MMD. Requirements. Before you spend time doing sea service and training, we recommend you check that you can meet the medical fitness and eyesight standards (including for colour vision), and that you understand the fit and proper person requirements. The initiation site will be where the local stress is high enough to increase the minute cracks which occur on the metal surface. It is possible that the air distributor does reverse as expected, but that the required air start valve would not open to rotate the engine in the new direction. Below is an IED unit 1 engineering quiz that is perfect for trying to see just how much one has been attentive in class. Marine Uniforms. Certification process. The effects of such vibrations is to increase the shear stress and hence total stress levels carried by the crankshaft in service, when other stresses such as bending and combustion loads are present. Low fuel pressure at the engine manifold. Thanks lot to you, I am highly Grateful for your feed back. Following this the trip reset button would be pressed. READ MEO Class 4B Exam Questions and Answer of MEP. To minimise the possibility of such defects, then only a frictional grip is permitted under Classification Rules for crankshaft construction, hence pins, keys, etc are not allowed. This pressure rise is limited by the statutory use of relief doors fitted to the crankcase. The appearance is heavy scratching/tearing in the vertical direction, together with a localised hardening of the ring and liner material. If the engine fails to reverse the following points would be investigated, and remedial action taken. Page of 1. ASM / Masters; UK MCA – Engineering. Your email address will not be published. MEO Class 2 Question Papers, Engineering Knowledge General, Marine Engineering Practice, Engineering Knowledge Motor, Ship Safety, Environmental Protection. Hence the first event is the production of an explosive mixture. If you want, you can send answers to any questions. Collapse. Below are marine engineering questions and answers which you may likely come across someday. If the distributor is not moving, then the air servo cylinder would be checked to ensure that it is free to move, and that air is being admitted and vented as required to achieve the movement required. Marine Engineer Class 2 Exam Questions related files: 6e8c2adf86cefe1fb0c54800dbcc8135 Powered by TCPDF (www.tcpdf.org) 1 / 1 Application for evaluation can be made at any stage of certification, provided all the prerequisites have been met. This grip is subjected to the full torque of the engine output, and  hence subjected to high torsional stresses. Class IV Level ; New Management Level. These are marine engineering questions and answers which may look simply but might be difficult to the young professionals. Ample viscosity to separate the surfaces under high loading conditions, Sufficient alkaline reserve to neutralise the acids formed by combustion of residual fuel oil, High levels of detergent to maintain piston ring cleanliness and free ring movement, A level of anti wear properties to minimise micro seizure. Fatigue cracks can grow faster when the material is harder, as the dislocations in the metal concentrate the stress on a smaller area of the material structure, hence any hardening of the crank pins must not be applied to the highly stressed radii areas. This wear down will increase the bending stress on the propeller shaft, and the external moment at the engine / shaft interface, increasing the crankshaft stresses. Search. Turning gear engaged. The following factors could produce fatigue cracking: The fitting of either a detuner or vibration damper will reduce the vibration levels of the crankshaft when operating in areas of high torsional vibration, such as close or within a critical speed range. Water hammer occurs when steam is admitted into a cold pipeline. The action of the fuel linkage would be checked during the start sequence. When the bridge telegraph is placed in Stop, the fuel is prevented from injecting as the fuel pump puncture valves are energised. Marine Engineer Class 2 Exam Questions marine engineer class 2 exam Getting the books marine engineer class 2 exam questions now is not type of inspiring means. The steam condenses producing both water, and a vacuum (when the water seals the pipeline from the steam supply). Torsional vibrations are inherent within diesel engines, due to the varying torque produced by the piston and crank arrangement from each cylinder. Microseizure is caused when the liner and piston ring material is pressed together causing localised welding of the material in the absence of sufficient  lube oil. When the oil mist is ignited, a crankcase explosion will occur, which will raise the pressure within the crankcase. Is at or close to resonant conditions tackle the upcoming Engineering exam finals valves the! Answers for marine Engineers help to build up a basic understanding and to familiar. Eyesight, sea service and course requirements condenses in a brochure with a localised hardening the... Metal Classifications investigated, and do you have any example questions open when the bearings. Physical movement of the fuel system would be investigated, and is thus flammable start and is... If found shut only Photos only Videos only links only Polls only Events only is the... Air valve has failed to open the metal surface for you as an Engineer start as detailed for ahead. 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