轮机英语听力与会话三版口述和问答题答案

轮机英语听力与会话三版口述和问答 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 答案 第一章 口述 1．​ The engine room is the heart of a ship. It is generally located at the stern near the ship bottom. In the engine room, there are a lot of machinery and systems, such as the main engine, the generater engine, boilers, pumps, the refrigerating system, and the air conditioning system. The main engine, also called the main propulsion plant，is the largest and most important one . The modern improvement of control systems results in machinery space remaining unattended for long periods. That is UMS. 第二章 口述 1.​ The main difference between the diesel engine and the gasoline engine include: 1) the combustion medium of a diesel engine is diesel oil or fuel oil, while that for a gasoline engine is gas oil. 2) the diesel engine is ignited through compression of hot, high pressure oil/air mixture, but the gasoline engine is ignited by electrical spark plug. 3) for diesel engine, the air and oil is mixed inside the cylinder, while for gasoline engine, they are mixed outside the cylinder. 1.​ First, I will tell the cadet the importance the engine room. Second, I should introduce the various machinery and systems in the engine room, such as the main engine, the generater engine, boilers, pumps, the refrigerating system, and the air conditioning system. Third, I will show him how to operate the various equipment and devices safely, and introduce as much safety knowledge as I can. 1.​ same as question No 2. 1.​ The power of the diesel engine is transmitted to the propeller through the transmission system. The items of transmission system include various shafts, such as the thrust shaft, one or more intermediate shafts and tail shaft. These shafts are supported by the thrust block, intermediate bearings and the sterntube bearing. The propeller consist of a boss with several blades,. The thrust is transmitted along the shafting to the thrust block and finally to ship structure. 1.​ When the ship is sailing at full speed, it need four engines running . When the ship is sailing at half speed, it require two engines running. While the ship is operating at about 30 % of full speed, one engine is enough to meet its power requiement. That is, the ship can be operated with single engine, double engines, or four engines according the load condition.Generally, when the ship is sailing at sea speed, it has four enginse running,whie it approaches the wharf, it has two. 1.​ The structure of the main engine is as follows: the construction mainly include bedplate, frame, cylinders, pistons, connecting rod, main bearing and crankshaft. The crankshaft rests in main bearings built into cross girders of the bedplate. On the top of A frames there is a scavenging air box. The bedplate, frames and cylinder blocks are secured together by long tie-rods. A piston consists of a lower part called piston skirt and an upper part called piston crown. 1.​ The moving parts shown in the illustration mainly include the piston, the connecting rod, and the crankshaft. These are all critical parts of the engine. According to the specific condition shown in the picture, the piston is under compression force, the connecting rod is under tension stress and compression force, while the crankshaft is under the torsion forces. 1.​ Pistons can be divided into two main classes: the crosshead type pistons and the trunk type pistons. The top surface of the crosshead piston can be flat, sunken or convex. The piston shown in the illustration is the crosshead type piston with a sunken surface. It has the advantage of increasing the air turbulance and imporvingthe oil/air mixing quality. Its disadvantage is that the cylinder volumetric clearance will be larger. 1.​ The piston rings shown in the illustration has the shape of rectangle or trapezoid. Some of them are rounded on the external top or bottom edges. Among these piston rings, No.1 and No.2 are sealing rings, No. 3 and No. 4 are scraper rings, while the No.5 is a distributor ring. Generally, each piston is provided with five or six piston rings. 1.​ Large marine diesel engines of crosshead construction generally have two systems of lubrication: a totally loss system feeding the cylinders and a circulating system lubricating the running gear and cooling the pistons. Oil is supplied to the cylinder liner wall and piston rings by means of mechanical lubricators. The lube oil to the varoius moving parts enable the formation of an oil film which reduces friction and wear. 三．A 1​ In order to ensure the safe navigation of the ship, frequent communication between the engineers and officers is necessary. The usual means of communication is by telephone and telegraph. If the communication between the engine room and the bridge fails, the ship will be endangered. The records of communication should be maintained which will provide evidence in the event of an accident at sea. Noon report is also a good means of communication between the engine room and the bridge. 4​ At the completion of the watch, each member of watchkeeping should hand over to his relief, ensuring that the relief is competent to take over and carry out his duties effectively. Before going off duty, the engineer in charge of the watch shall ensure that all events related to the main and auxiliary machinery are suitalby recorded. He should tell the relieving engineer the standing orders , special intructions and unfinished work, if any. If he has any reason to believe that the relieving engineer is not capable of carrying out the watchkeeping duties effectively, he shall not hand over the watch and the chief engineer shall be notified. 四 1 Last year when I worked on a bulk carrier, I found the exhaust temperature of the main engine is rising quickly. There was a fire in the scavenge air box. The engine was slowed down. The fuel was shut off from the affected cylinders. I opened wide the inlet valve of the cooling water. The duty motorman increased the cylinder lubrication. The fire quickly burnt out. 2​ In the event of sudden stoppage of the main engine, the possible cause may be the safety protection system functioning, due to low lube oil pressure, fuel oil breakdown, blackout, overspeed and so on. Generally, we should take the following actions: first, we will carefully examine the main engine and find the causes. Second, we will take measures to remedy the trouble. Third, we will reset and restart the main engine. 3​ If the turbocharger surges, the possible causes include high back pressure of exhaust manifold and low flowing quantity, rapid change in load, insufficient fuel oil, bad combustion, scavenge fire and so on. In the event of turbocharger surge, we will slow down the main engine, find the causes, and do some remedies. 8​ When we start the emergency generator, we should take the following steps. First, check the lube oil and fuel oil levels, as well as the water level. Second, the selecting switch will change over from “automatic ” to “manual”. Third, push the starting button, and check the voltage and frequency. 9​ The maintennace work of emergency battery include: 1) check the electrolyte level. 2) keep the emergency battery clean. 3) measure the voltage of the battery. 4) measure the specific gravity of the electrolyte. 5) periodically charge and discharge the battery so as to protect the plate electrode. 11​ Fire is a constant hazard at sea. It is the result of a combination of three factors, namely, inflammable material, hot spot, and oxygen. According to the material involved, fires can be divided into four classes:. For example, burning light metals will be classified as Class D, burning electric equipment classified as Class C, burning oils is Class B, and burning wood, Class A. 17​  In the event of collision, the bridge will inform the captain and the engine room immediately. The bridge should tell the engine room the striking position, damage extent and so on. The engine room should take measures accordingly. In case of engine room flooding, the engine room personnel should report to the bridge, and take actions according to the muster list. 20​ The muster list is an important document on board. It tells the crew members their position and duties in emergency situations, such as fire, collision, oil spill, abandoning ship, ship grounding and so on. For example, in case of flooding, the chief engineer should go to the engine room and be in general command.The second engineer should maneuver the main engine. Some other members should go to stop the flooding and so on. 21​ Once a container ship collided with a bulk carrier. The captain of the container ship decided to abandon the ship since it was in danger of sinking. The engine room personnel stopped the engine, cut off the electric supply, closed the ventilators, released the compressed air and steam. The chief engineer collected the important documents and all engine room staff evacuated from the engine room. 23​ The maintenance work of the lifeboat engine mainly include: 1) check the various oil levels and water levels. 2) start the lifeboat engine once every week, make it run for about five minutes. 3) protect the engine from freezing with anti-freezing fluid. 24​ SOPEP stands for Shipboard Oil Pollution Emergency Plan.Its main contents include the person to be contacted in case of oil spill, his contacting methods such as phone number and adress, the procedure to be adopted in case of oil spill, such as the disposal methods, anti-pollution equipment and materials. 25​ The materials used for oil spillage mainly include the following: 1) the material used for cleaning up spilled oil, for example, the oil absorbent such as saw dust and oil felt.2)The material for preventing split oil from spreading out, such as oil booms. Oil dispersent is seldom used since it must get the approval from the port administration and may cause secondary pollution. 27​ In the event of a man falling overboard, the person who see the accident must shout for help, inform the bridge, throw a lifebuoy into the water and keep the man in his visual scope. The bridge should sound the alarm, and take measures to save the man, for example, slowing down, changing the direction, and lowering the lifeboat to pick up the man falling overboard. 28​ First aid is emergency care for a victim of sudden illness or injury until more skillful medical treatment is available. The usual actions taken in the first aid include artificial breathing, stopping bleeding with bandage and so on. Once I saw a sailor who had his hand injured during the firefighting drill. I immediately help him stop the bleeding with the medicine and the bandage. 五 2​ When selecting the fuel oil, there are many factors to consider, such as viscosity, cetane number, calorific value and so on. Before bunkering, the engine room personnel should make the bunkering plan and other necessary preparations . The third engineer will go to the oil lighter to measure the content of all the oil tanks. During bunkering, the engine department and deck department should work cooperatively. After bunkering, the crew will flush the oil retained in the hoses with compressed air and calculate the volume of oil received. 4​ Before repair, the engine room personnel have a lot of work to do.They should confirm which items in their charge are to be repaired. They will prepare the necessary spare parts and special tools. Then the second engineer will collect all the information about the repair items. After being verified by the chief engineer and signed by the captain, the repair list will be submited to the company for approval. 7​ As a chief engineer, if I want to receive a new ship, I will take the following items into consideration. First, check the list of engine room equipment and machinery, as well as the list of stores and spare parts. Second, test all the devices in the engine room. Third, conduct the sea trial, collect and submit all the items of non-conformity to the company. 答案 1.​ how long have you worked on board? I have worked on board for 10 years. 2. which certificate do you have now? I have the second engineer’s certificate. 3. what is your marital status?how many departments are there on board? I am married. There are there departments on board. 4. how many people are there in your family? Are you married? There are there people in my family. Yes,I am married. 5.​ how many countries have you ever been to? I have been to seven countries. 6. when did you begin to work on board? What kind of ship have you worked on? I began to work on board in 2000.i have worked on bulk sarriers. 7. how many importment canals are there all over the world? Three . the pamama ,suez and kiel. 8.​ can you tell me what is the most important thing for a seafarer.? Safety. 8.​ what kinds of main engine and generator engine have you worked on? Large slow speed crosshead type marine diesel engine and A.C generator. 8.​ which classification society is your ship registered with? CCS china classification society 8.​ have you worked any ship that caused damage in critical equipments? Yes, I have worked on a bulk carried that the man engine haved damaged. 8.​ how do you make you maintenance schedules? It is based on ship’s planed maintenance syetem and the machinery running hours records. 8.​ could you list international conventions concerning marine shipping? SOLAS (the international convertion for the safety of life at sea) MARPOL (the international convertion for the prevention of pollution form ships) LOAD LINE ( the international convertion on load line) 14 .could ou tell the usages of the STCW convention? STCW convention established an international standard for the training, certification and watchkeeping on the seafarers. 15.what is the purpose of classification society? Could you list some of them? The classification society works for ensuring the safety of the crew and ship and protecting sea from the pollution. Lioyd’s, CCS, ABS 16​ could you list different kinds of ship’s surveys? Annual survey docking survey,special survey, damage survey. 16​ what does UMS stand for? Have you served UMS? UMS stands for unattended machinery space. I have severed UMS. 16​ have you even experienced PSC inspection? Where and when was your last inspection? Yes,Last month in singapore. 16​ what should be paid attention to in the overhaul of a cylinder. Every operating must be complied with the precaution measures regulated in the SMS. 16​ before entering an enclosed space such as ballast tank,what action will you take? Check the content of oxygen and ventilation. 16​ please tell me the minimum safe oxygen percentage for the safety of the workers in an enclosed space. 18%. 第二章 1 please introduce one type of the main engine The main engine is large bore two-stroke crosshead type with turbo charging system. 2 please introduce fuel injection process of electronically controlled main engine The electronies control of fuel injection improves low- load operation engine speeding up given better engine balance and load control 3 please introduce dual fuel technology of main engine This kind of main engine can burn both natural gas and fuel oil used in large medium speed engine. 4 why is the two-stroke engine widely used on board ship? Because the two-stroke engine can develop twice the power of the four-stroke engine of the same size. 5 why is the air exchanging quality of four-stroke engine more than of two-stroke engine Four –stroke engine has an enough overlap between inlet v/v opening and exhaust v/v closing 6 please introduce three moving parts of marine main engine Crankshaft, connecting rod, crosshead,piston 7 what’s the sequence of the four strokes? Suction,compression, expansion and exhaust 8 please introduce four fixing parts of marine main engine Bed plate, cylinder block, scavenge air box and frame. 9 what is called a working cycle of diesel engine? The cycle refers to the operation between two fuel injections. 10 what is the foundation of diesel engine? The bedplate is the foundation of the engine. 11 what are the fouction and feature of the tie rods? Hold the bedplate,frames and cylinder blocks together to form a rigid structure.feature the tie rod is long and good tensioning strength. 12 what is the fouction of the governor? The governor can regulate the speed of the engine by controlling the fuel injected into the cylinder. 13 what is the feature of the governor? Instantaneous speed, regulating speed fluctuation, and so on 14 what is used for connecting the piston rod and connecting rod? Crosshead 15 what is used for sealing between the crankcase and scavenging air box? The piston rod stuffing box. 16 what are the two types of the cooling system? They are fresh water cooling system and sea water cooling system. 17 what’s the function of the head tank in the cooling water system? Expansion and make-up of the water ,air releasing and water treatment. 18 please introduce the open cooling system. Open cooling system use similar elements with closed system expect that a drain tank is used instead of a head tank. 19 please introduce the close cooling system Closed cooling system has the engine jacket heat exhanger and circulating pump to from a continous circuite with a head tank open to atmosphere.. 20 please introduce the central cooling system. Central cooling system is based on same design principles with convention sea water cooling system but with a central cooler and one a additional set of pump 21 what’s the advantage of the central cooling water system? With less equipment contacting with seawater,the corrosion problems are much reduced 22 how to control fuel oil viscosity of main engine? By controlling the oil temperature. 23 please introduce two sub-systems of the fuel oil system/ Fuel supply system and fuel injection system. 24 please speak out the function of the fuel oil viscosity regulator. By controlling the oil temperature 25 how does the fuel oil viscosity regulator work? By controlling the oil temperature 26 please tell at least three composition of fuel oil. Sulphur, ,ash content ,cetane number 27 please name at least three of main factors to select a fuel oil. Viscosity,cetane number,calorific value,sulphr,ash content,flash point,setting point,specific gravity. 28 what is the usual coolant in marine diesel engine? Fresh water ,lube oil and seawater. 29 why seawater is not used directly as a coolant in diesel engine? Because seawater is corrosive and liable to leave deposits.to block the jackets 30 what ‘s the advantage of oil-cooling piston? The advantage is the same oil also can be used for lubrication and any leakage will not cause corrosive problem. 31 what’s the disadvantage of water-cooling piston? Cooling water leakage can pollute the lube oil 32 what’s the function of the lubricating oil in main engine? Provide lubricating film,remove heat from oil cooled piston,neutralize acidic products of combustion, cleanse hot moving parts of carbonaccous deposits,resist oxidation and wash away wear detritus. 33 how do you clean the lube oil filters? By washing with diesel oil 34 when do you clean the fuel oil filters? The filter is clogged by impurities 35 why must the cylinder oil have alkalinity? Neutralize the acid products of combustion 36 what’s the function of the cylinder oil? Lubrication, sealing and removing heat 37 how do you start the air compressor? Unload starting 38 what do you pay attention to when you stand by engine? Checked various pressure and temperatures ,warm up the engine, turn the engine with turning gear and so on 39 do you know the reasons why the engine does not start on air? Starrting air pressure too low,incorrect timing of starting air valve,stop-valve on air line being closed and so on 40 what should you periodically do for the air reservoir? We should drain the condense water and make up the air regularly 41 what’s the function of gas exchange in diesel engine? Gas exchange refers to the supply of fresh air and removal of exhaust gas 42