輪機英語歷年真題46期.doc

中華人民共和國海事局2008第2期海船船員適任統(tǒng)考試題(總第46期) 科目：輪機英語 試卷代號：805適用對象：無限/近洋航區(qū)3000KW及以上船舶二/三管輪（本試卷卷面總分100分，及格分為70分，考試時間為100分鐘）答題說明：請選擇一個最合適的答案，并將該答案按答題卡要求，在其相應位置上用2B鉛筆涂黑。第1題至88題，每題1分，第89題至96題，每題1.5分。一單項選擇題1. In order to control thermal stresses, some type of modern engines use pistons with _. A. heavy wall and intensive cooling B. heavy wall and no cooling C. thin wall and no cooling D. thin wall and intensive cooling2. The average pressure exerted on a piston during each power stroke is termed _. A. indicated horsepower B. mean effective pressure C. exhaust back pressure D. compression pressure3. The ignition quality of a diesel fuel is indicated by the _. A. cetane number B. volatility point C. viscosity index D. octane number4. A piston in a four-stroke/cycle diesel engine makes four strokes during each _. A. crankshaft revolution B. mechanical cycle of operation C. period of two combustion cycles D. cycle of two events5. Crankshafts of medium speed engines are _ from a single piece of steel. A. unusually solid welded B. never be solid forged C. almost invariably solid forged D. almost invariably be welded6. The starting air entering the cylinder begins when the piston _. A. has nearly come to the TDC B. has just past the TDC C. has nearly come to the BDC D. has just past the BDC7. A main bearing consists of two shells which are secured by means of studs and _. A. tie rods B. through bolts C. lead wires D. bearing caps8. Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of _. A. less even torque B. higher cylinder head temperature B. fewer power strokes per revolution D. greater weight/size requirements9. _ controls the fuel oil temperature in order to provide oil the correct viscosity for combustion. A. The viscosity regulator B. The temperature controller C. The flow meter D. The pressure switch10. In a diesel engine lube oil system, which of the following parts should be lubricated first? A. Camshaft bearings B. Main bearings C. Piston crowns D. Cylinder walls11. A large, low-speed, main propulsion diesel engine uses sea water to directly cool the _. A. cylinder heads B. exhaust valves C. scavenging air D. injectors12. In a turbocharger, inlet air velocity is increased in the _. A. inlet nozzle ring B. stationary diffuser passages C. compressor outlet volute D. rotating impeller vanes13. Each cylinder has one starting valve which is usually opened by air pressure and closed by _. A. nuts and bolts B. new joints C. spring force D. sealing rings14. In a simple mechanical governor, the _. A. centrifugal force rotates the ball-head B. flyweight centrifugal force is balanced by spring force C. flyweight centrifugal force is balanced by hydraulic pressure D. speeder spring alone actuates the fuel control rod15. A pyrometer is an instrument commonly used to measure _. A. cylinder pressure B. flame intensity C. exhaust gas temperature D. crankshaft axial alignment16. After starting a diesel engine, which of the listed operating conditions should be checked first? A. Air box pressure B. Lube oil pressure C. Exhaust temperatures D. Raw water pressure17. A high temperature alarm or _ which will melt is used to guard against the explosion of compressor air pipelines. A. a flame trap B. a relief valve C. a fusible plug D. a bursting cap18. What preventative maintenance should be done frequently to diesel engine starting air receivers? A. Drain the accumulated moisture. B. Test the relief valves. C. Watch the temperature to prevent fluctuations in pressure. D. Clean the interior to remove oil and foreign matter.19. In reducing engine speed to an efficient propeller speed by the use of reduction gears, _. A. speed and torque are both reduced B. speed is reduced and torque remains unchanged C. speed is reduced and torque is increased D. speed is sometimes unchanged while torque is increased20. Which of the following statements concerning fire-tube boilers is correct? A. Combustion gases flow through the tubes. B. Flames impinge on the tubes. C. Water impinges on the tubes. D. Water flows through the tubes.21. The exhaust boilers are used to recover some of _ carried in the exhaust gas from the main engine. A. water B. oil C. heat D. steam22. The water level in a steaming auxiliary boiler will always _. A. rise when the steam pressure is increased B. remain constant as long as the feed pump operates C. fall when the steam pressure is decreased D. vary as the steam demand changes23. When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter? A. Cold fuel oil B. Low fuel oil pressure C. Low atomized steam pressure D. Water in the fuel oil24. If the feed pump for and auxiliary boiler fails to deliver the feed water to the boiler, the cause may be _. A. high steam pressure in the boiler B. abnormally high feed-water temperature C. abnormally high boiler water temperature D. steam demand exceeding feed pump capacity 25. Through a _ pump the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers. A. positive displacement B. ejector C. centrifugal D. air compressor 26. Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump. A. to prevent seawater from passing out the stuffing box when a high suction head is present B. to cool the shaft C. in place of mechanical seats D. in place of lantern rings 27. Which of the valves listed will be cycled from fully open to fully close when the handle is turned 90 degrees? A. A rising stem gate valve B. A globe stop valve C. A check valve D. A butterfly valve 28. Centrifugal pumps, used to handle hot liquids, must have a minimum flow through them under all operating conditions. This flow serves to _. A. prevent overheating and damage to pump rotating parts due to rubbing B. maintain the net positive suction head of the pump C. maintain hydraulic differential in the pump impeller passages D. purge the pump of non-condensable vapors and gases 29. If you heard a cracking noise in a centrifugal pump, the most probable cause of the problem would be _. A. insufficient speed B. cavitation C. excess discharge pressure D. excessive net positive suction head 30. In the process of _ liquid changes into gas. A. evaporation B. frosting C. condensing D. compressing 31. The device used for low-pressure control and high-pressure cutout on a compressor is called a _. A. cutout B. pressure controller C. controller switch D. cutout switch 32. A purge recovery system is used in a central air conditioning or refrigeration system to _. A. purge lube oil from the liquid refrigerant B. recover water purged from the system C. separate foul gases from the receiver D. purge non-condensable gases without losing refrigerant 33. In an air conditioning system, low head pressure associated with a reciprocating compressor can be the result of _. A. broken valve springs B. tight drive belts C. high line voltage D. air in the system 34. When discharging bilge water over board, which criteria must be observed? A. The requirement for the oil content of bilge water discharged is under 15 ppm. B. No discharge in sensitive waters C. Any discharge in sensitive waters D. International, national or local requirements have to be observed 35. The following measures can be used to improve oily water separators separating effect except _. A. overhauling every two years B. working at intervals C. renewing filtration material D. properly heating 36. Disposal of all kinds of garbage but _ listed as below is prohibited within Special Areas. A. comminuted or ground papers, rags, glass, metal, etc B. plastics C. food waste comminuted or ground D. incinerator ash 37. When does auxiliary burner of incinerator put into operation? I. start incinerator when it is cold II. Little waste oil for dealing with III. plenty of waste oil for dealing with IV. The water and impurity in sludge are too much V. the temperature in incinerator is low VI. dealing with little solid rubbishA. II+III+V B. I+II+III+IV C. I+IV+V+VI D. I+II+III+VI 38. Bacteria which live _ are said to be aerobic.A. in the presence of oxygen B. without oxygenC. in the presence of nutrition D. without nutrition 39. When centrifuging heavy fuel oil, an important factor to consider is (are) the _. I. flow rate II. Viscosity of the fuel oil A. I B. II C. I+II D. Neither I nor II are correct 40. To ensure lube oil purifier working in normal condition, the interval between two sludge discharging should not exceed _ hours.A. 2 B. 4 C. 5 D. 641. _ can not cause oil flow from water outlet of self cleaning purifier. A. Oil temperature too high B. Diameter of gravity disc too large C. Oil temperature too low D. High level tank out of water42. In the production of freshwater from seawater through a process of heating and cooling, the cooling phase of production is usually called _. A. evaporation B. distillation C. dehydration D. condensation43. Distilled water from an evaporator may be discharge into a potable water tank _. A. through a detachable hose connection B. after passing through an activated charcoal filter C. after chemical analysis shows it is fit for consumption D. through a solenoid operated three-way valve44. What type of valve is used to direct the flow of hydraulic fluid? A. relief valve B. direction control valve C. stop valve D. pressure control valve45. Cargo handling unit is rated according to the _ to be lifted. A. cargo crane B. jib C. safe working load D. oil pressure46. The crane is usually mounted on a platform to offer adequate _ to the operator. A. sight B. width C. length D. visibility47. Proper internal lubrication of a hydraulic anchor windlass left idle for extended periods can be accomplished by _. A. performing a check run on the unit at regular intervals B. testing the hydraulic fluid for proper PH C. checking the reservoir for proper level D. cleaning strainers at regular intervals48. _ are used for hauling in or letting out the wires which fasten the ship to the shore. A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches49. The major source of chemical contaminants in hydraulic fluid is _. A. microscopic steel shavings B. abrasive waste C. anti-oxidant compounds D. oxidation by-products50. If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to prevent _. A. failure of the hydraulic hose B. excessive flow through the line B. friction in other areas of the hydraulic system D. overheating of the hydraulic fluid51. A circuit that has one wire in contact with the hull of the ship is a _. A. series circuit B. grounded circuit C. short circuit D. closed circuit52. The frequency of an alternator at a given r/min is determined by the _. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage53. The operation of paralleling two alternators requires the voltages to be _ and also in phase. A. zero B. eliminated C. different D. equal54. The frequency of an AC generator is controlled by the _. A. rheostat B. governor C. exciter D. capacitor55. A motor enclosure which protects against falling liquids is classified as _. A. water-proof B. drip-proof C. spray-tight D. spray-proof56. _ are supplied with electricity by main switchboard directly. A. Suez Canal searchlight, air compressor and air conditioning compressor B. Air compressor, boiler blower and refrigeration plant C. Boiler blower, Suez Canal searchlight and refrigeration plant D. Suez Canal searchlight and boiler blower57. _ is not installed on the emergency switchboard. A. Ammeter B. Voltmeter C. Wattmeter D. Synchroscope58. When two D.C. generators operate in parallel, they are protected against motorizing by _. A. blow out coils B. governor relay C. under voltage trips D. reverse current trips59. Moisture in a D.C. motor would cause _. A. short circuit B. speed up C. slow down D. hunting60. The part of a fuse that melts and opens the circuit is made of _. A. copper and antimony B. steel and babbit C. aluminum or beryllium alloy D. zinc or an alloy of tin and lead61. The main purpose of an electric space heater installed in a large A.C. generator is to _. A. prevent the windings from becoming brittle B. prevent moisture from condensing in the windings during shutdown C. prevent acidic pitting of the slip rings D. keep the lube oil warm for quick starting62. Sparking at the brushes of a running motor could be an indication of _. A. normal operation B. a dirty commutator C. increased brush capacity D. water vapor absorption 63. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to _. A. test the starting system B. remove condensation from the cylinders C. check the compression D. check for proper lube oil pressure64. During the watch keeping at sea, _ should be logged or recorded in the engine log book. A. the running hours of the cooling water pump B. chief engineers order C. the main parameters of main and auxiliary equipment D. the position of the vessel65. During ship maneuvering, when the diesel is stopped, which of the following items is wrong? A. keep all systems running normally B. main engine is available at any moment C. shut off the starting air bottle outlet valve D. pay attention to the changes of the system parameters66. Which of the listed conditions can be considered as the single greatest cause of accidents? A. Speed B. Excessive knowledge or skill C. Human error D. Excitement67. On a tank vessel, which of the following substances would be burning in a class “B” fire? A. Oil B. Wood C. Rags D. Electric wiring68. The most likely place for a fire to start through the process of spontaneous combustion is in _. A. an electrical switchboard B. the pressure tanks C. the fuel oil tanks D. the oily rag bin69. Which of the fire extinguishers listed is to be weighed annually and sent ashore for recharging if the weight loss exceeds 10% of the weight of a full charge? A. Foam B. Soda acid C. Dry chemical D. Carbon dioxide70. While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take first? A. Secure the burners then proceed to your assigned board station. B. Start the fire pump and establish flow to the fire main. C. Open the guardian valve and standby to maneover. D. Open the master control valves on the fixed CO2 system.71. If there were a fire in the bunker tanks, you should _. A. close the vent B. pump out the tank C. activate the fixed CO2 system D. cut off the heating coils72. To avoid excessive surge pressure when bunkering, you should _. A. bunker at a normal rate B. check for kinks in hose C. close valves slowly D. shut valves before topping off73. _, where minor repairs are carried out with a ship in service, often during a stay in port. This may be remote from a ship repair site. A. Voyage repair B. Routine docking C. Daage repairs D. Conversion74. When is the dock survey carried out? A. During annual repair B. Usually during dock repair C. Before sea trial D. After 5 years from last annual survey75. In the initial survey, _ complies the survey report and fills in certificate. A. surveyor B. chief engineer C. administrator D. company superintendent76. If an incorrect entry were made in the Oil Record Book, you should _. A. erase the entry and rewrite it B. notify the ships officer-in-charge C. rewrite it D. draw a single line through the wrong entry and initial it.77. The International Oil Pollution Prevention Certificate is valid for a period of _. A. one year from the date of issue B. five years from the date of issue C. three years from the date of issue D. four years from th