第46期轮机英语试题

第46期轮机英语试题一单项选择题D1. In order to concrol thermal stresses ,some types of modern engines use pistons with __A heavy wall and intensive coolingB heavy wall and no coolingCthin wall and no cooling D thin wall and intensive coolingB2. The average pressure exerted on a piston during each power stroke is termedA indicatedB ean effective pressureC exhaust back pessureD compression pressure A3. The ignition quality of a diesel fuel is indicated by the___A cetane numberB volatility pointC viscosity index Doctane numberB4. A piston in a four stroke cycle disesel engine makes four stroke during each __A crankshaft revolutionB mechanical cycle of operationC period of two cobustion cyclesD cycle of two eventsC5. Crankshafts of medium speed engines are _____from a single piece of steelA unusually solid weldedB never be solid forgedC almost invariablyD almost invariably be weldedB6 .The starting air entering the cylinder begins when the piston ______A has nearly come to the TDCB has just past the TDCC has nearly come to the BDCD has just past the BDCD7 .A main bearing consists of two shells which are secured by means of studs and _________A tie rodsB through boltsC lead wiresD bearing capsB8 .Compared to four stroke cycle engines ,two ~stroke /cye diesel engines have the disadvantage of ________A less even torqueB higher cylinder head temperatures Cfewer power strokes per revolution D greater weight /size requirementsA9. _____controls the fuel oil temperature in order to provide oil at the correct viscosity for combustionA The viscosity regulatorB The temperature controllerC The flow metet DThe pressure switchB10. In a diesel engine lube oil system ,which of the following parts should be lubricated first ?A camshaft bearingsB Main bearingsC Piston crownsD Cylinder walls C11 A large ,low speed ,main propulsion diesel engine uses sea water to directly cool the ________A cylinder headsB exhaust valvesC scavenging airD injectorsD12. In a rubocharger ,inlet air velocity is increased in the __________A inlet nozzle ringB stationary diffuser passagesC compressor outlet voluteD rotating impeller vanesC13 .Each cylinder has one starting valve which is usually opened by air pressure and closed by _________A nuts and boltsB new jointsC spring forceD sealing ringsB14. In a simple mechanical governor ,the _________A centrifugal force rotates the ball-headB Flyweight centrifugal force is balanced by spring forceC flyweight centrifugal force is balanced by hydraulic pressureDspeeder spring alone actuates the fuel control rodC15. A pyrometer is an instrument commomly used to measure _______A cylinder pressureB flame intensityC exhaust gas temperatureD crankshaft axial aliganmentB16 .After starting a disesel engine ,which of listed opetating conditions should be checked first? Aair box pressure B lube oil pressure C Exhaust temperatures D raw watert perssureC17. A high temperature alarm or ____which will melt is used to guard against the explosion of compressorpipelinesA a flame trapB a relief valveC a fusible plugD a bursting capA18. What preventative maintenace should be done frequently to diesel engine starting air receivers?A drain the accumulated moistureB.T est the relief valves.C.Watch the temperature to prevent fluctuations in pressure.D.Clean the interior to remove oil and foreign matter.C19 .In reducing engine speed to an efficient propeller speed by the use of reduction gears ,_____Aspeed and torque are both reducedB speed is reduced and torque remains unchangedC speed is reduced and torque is increasedD speed is sometimes unchanged while torque is increasedA20 .Which of the following statements concerning fire-tube boilers is correct ?A Combustion gases flow through the tubesB Flames impinge on the tubesC Combustion occurs in the tubesD Water flows through the tubesC21. The exhaust boilers are used to recover some of _____carried in the exhaust gas from the main engineA waterB oilC heatD steamD22 .The water level in a steaming auxiliary boiler will always ___A rise when the steam pressure is in creasedB remain constant as long as the feed pump operatesC fall when the steam pressure is decreasedD vary as the steam demand changesD23. when lighting off an auxiliary boiler ,which of the problems listed could cause the burners to sputter ?A cold fuel oilB low fuel oil pressureC low atomizing steam pressureD Water in the fuel oilB24 .If the feed pump for an auxiliaty boier fails to deliver the feed water to the boiler ,the cause may be ___A High steam pressure in the boilerB abnormally high feed-water temperatureC abnormally high boiler watemperature D steam demand exceeding feed pump capacityA25.Through a _________pump,the liquid is transferred from the suction to the discharge by the mechanicalvariation of the volume of a chamber or chambers.A.positive displacementB.ejectorC.centrifugalD.air compressorB26.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 presentB.to cool the shaftC.in place of mechanical sealsD.in place of lantern rings D27.Which of the valves listed will be cycled from fully open to fully close when the handle is turned 90 degree?A. A rising stem gate valveB.A globe stop valveC.A check valveD. A butterfly valve A28.Centrifugal pumps,used to handle hot liquids, must have a minimum flow through them under all operatingconditions.This flow serves to __________A.prevent overheating and damage to pump rotating parts due to rubbingB.maintain the net positive suction head of the pumpC.maintain hydraulic differential in the pump impeller passagesD.purge the pump of non-condensable vapors and gasesB29.If you heard a ‘crackling’noise in a centrifugal pump, the most probable cause of the problem would be___________A.insufficient speedB.cavitationC.excess discharge pressureD.excessive net positive suction headA30.In the process of _________,liquid changes into gas.A.evaporation Bfrosting C.condensing pressi ngB31.The device used for low-pressure control and high-pressure cutout on a compressor is called a____________.A.cutoutB.pressure controllerC.controller switchD.cutout switchD32.A purge recovery system is used in a central air conditioning or refrigeration system to ________A.purge lube oil from the liquid refrigerantB.recover water purged from the systemC.separate foul gases from the receiverD.purge non-condensable gases without losing refrigerant A33.In an air conditioning system,low head pressure associated with a reciprocating compressor can be theresult of ___________.A.broken valve springsB.tight drive beltsC.high line voltageD.air in the systemA34.When discharging bilge water over board, which criteria must be observed?A.The requirement for the oil content of bilge water discharged is under 15ppmB.No discharge in sensitive watersC.Any discharge in sensitive watersD.International, national or local requirements have to be observedA35.The following measures can be used to improve oily water separator’s separating effect except____________.A.overhauling every two yearB.working at intervalsC.renewing filtration materialD.properly heatingC36.disposal of all kinds of garbage but _______Listed as below is prohibited within Special Areasminuted or ground papers,rags,glass,metalB.plasticsC.food waste comminuted or groundDincinerator ashC37.when does auxiliary burner of incinerator put into opertaion?I.start incinerator when it is coldII.little waste oil for dealing withIII.plenty of waste oil for dealing withIV.the water and impurity in sludge are too muchV.the temperature in incinerator is lowVI.dealing with little solid rubbishA.II+III+VB.I+II+III+IVC.I+IV+V+VID.I+II+III+VIA38.bacteria which live ______are said to be aerobic.A.in the presence of oxygenB.without oxygenC. in the presence of nutritionD.without nutritionC39.when centrifuging heavy fuel oil,an important factor to consider is the _____.1.fuel rate2.viscosity of fuel oilA.1B.2C.12D.neither 1 nor 2 is correctB40.to ensure lube oil purifier working in normal conditon,the interval between twp sludge discharging should nexceed ______ hours.A 2B 4C 5D 6D41._______can not cause oil flow from water outlet of self cleaning purifier.A.oil temperature too highB.diameter of gravity disc too largeC.oil temperature too low D high level tank out of waterD42.in the production of freshwater from seawater through a process of heating and cooling,the cooling phaseproduction is usually called__________.A evaporationB distillationC dehydration DcondensationD43.distilled water from an evaporator may be discharged into a potable water tank_________A.through a detachable hose connectionB.after passing through an activated charcoal filterC.after chemical analysis shows it is fit for consumptionDthrough a solenoid operated three-way valveB44.what type of valve is used to direct the flow of hydraulic fluid?A.relief valveB.direction control valveC.stop valveD.pressure control valveC45.cargo handling unit is rated according to the ____________to be lifted.A.cargo craneB.jibC.safe working loadD.oil pressureD46.the crane is usually mounted on a pedestal to offer adequate ________to the operator.A.timeB.placeC.length DvisbilityA47.proper internal lubrication of a hydraulic anchor windlass left idle fro extended periods can be accomplishby_________________.A.performing a check run on the unit at regular intervalsB.testing the hydraulic fluid for proper PHC.checking the reservior for proper levelD.cleaning strainers at regular intervalsB48.________are used for hauling in or letting out the wires which fasten the ship to the shore.A.cargo winchesB.mooring winchesC.windlassesD.cargo hatchesD49.the major source of chemical contaminants in hydraulic fluid is __________.A.microscopic steel shavings B abrasive wasteC.anti-oxidant compoundsD.oxidation by-productsA50．If you install a new hydraulic hose in a hydraulilc system, the hose must be long enough to allow for contractionprevent______.A. failure of the hydraulic hoseB. excessive flow through the lineC. friction in other areas of the hydraulic systemD. overheating of the hydraulic fluidB51. A circuit that has one wire in contact with the hull of the ship is a ______.A. series circuitB. grounded circuitC. short circuitD. closed circuitB52. The frequency of an alternator at a given r/min is determined by the ______.A. number of turns of wire in the armature coilB. number of magnetic polesC. strength of the magnets usedD. outpul voltageD53. The operation of paralleling two alternators requires the voltages to be _____and also in phase.A. zeroB.eliminatedC. different D, equalB54. The frequency of an AC generator is controlled by the ______.A. rheostat .ernorC.exciterD. capacitorB55. A motor enclosure which protects against falling liquids is classified as ______.A. water-proofB. drip-proofC. spray- tightD. spray-proofD56. _______are supplied with electricity by main switchboard directly.A. Suez Canal searchlight,air compressor and air conditioning compressorB. Air compressor, boiler blower and refrigeration plantC. Boiler blower, Suez Canal searchlight and refrigeration plantD. Suez Canal searchlight and boiler blowerD57. _______is not installed on the emergency switchboard.A. AmmeterB. VoltmeterC. WattmeterD. SynchroscopeD58. When two D.C. generators operate in parallel, they are protected against motorizing by ______.A. blow out coilsB. governor relayC. under voltage tripsD. reverse current tripsA59. Moisture in a D.C. motor would cause ______.A. short circuitB. speed upC. slow downD. huntingD60. The part of a fuse that melts and opens the circuit is made of ______.A. copper and antimonyB. steel and babbittC. aluminum or beryllium alloyD. zinc or an alloy of tin and leadB61. The main purpose of an electric space heater installed in a large AC generator is to ______.A. prevent the windings from becoming brittleB. prevent moisture from condensing in the windings during shutdownC. prevent acidic pitting of the slip ringsD. keep the lube oil warm for quick startingB62. Sparking at the brushes of a running motor could be an indication of ______.A. normal operationB. a dirty commutatorC. increased brush capacityD. water vapor absorptionB63. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is______.A. test the staring systemB. remove condensation from the cylindersC. check the compressionD. check for proper lube oil pressureC64. During the watch keeping at sea, ______ should be logged or recorded in the engine log book.A. the running hours of the cooling water pumpB. chief engineer’s orderC. the main parameters of main and auxiliary equipments.D. the position of the vesselC65. During ship maneuvering, when the diesel is stopped, which of the following items is wrong?A. keep all systems running normallyB. main engine is available at any momentC. shut off the starting air bottle outlet valveD. pay attention to the changes of the system parametersC66. Which of the listed conditions can be considered as the single greatest cause of accidents? A. Speed B. Excessive knowledge or skillC. Human errorD. ExcitementA67. On a tank vessel, which of the following substances would be burning in a class ‘B’ fire?A. OilB. WoodC. RagsD. Electrical wiringD68. The most likely place for a fire to start through the process of spontaneous combustion is in _______.A. an electrical switchboardB. the pressure tanksC. the fuel oil tanksD. the oily rag binD69. Which of the fire extinguishers listed is to be weighed annually and sent ashore for recharging if the weight lexceeds 10% of the weight of a full charge?A. FoamB. Soda acidC. Dry chemicalD. Carbon dioxideB70. While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the followactions should you take first?A. Secure the burners then proceed to your assigned boat station.B. Start the fire pump and establish flow to the fire main.C. Open the guardian valve and standby to maneuver.D. Open the master control valves on the fixed CO2 system.A71. If there were a fire in the bunker tanks , you should ______.A. close the ventB. pump out the tankC. activate the fixed CO2 systemD. cut off the heating coilsC72. To avoid excessive surge pressure when bunkering, you should _______.A. bunker at a normal rateB. check for kinks in hoseC. close valves slowlyD. shut valves before topping offA73. ________, where minor repairs are carried out with a ship in service, often during a stay in port. This may be remfrom a ship repair site.A. Voyage repairsB. Routine dockingC. Damage repairsD. Conversion B74. When is the dock survey carried out?A. During annual repairB. Usually during dock repairC. Before sea trialD. After 5 years from last annual surveyA75. In the initial survey, _______ compiles the survey report and fills in certificate.A. surveyorB. chief engineerC. administratorD. company superintendentD76. If an incorrect entry were made in the Oil Record Book, you should ________.A. erase the entry and rewrite itB. notify the ship’s officer-in-chargeC. completely black it out and make the correct entry alongsideD. draw a single line through the wrong entry and initial itB77. The International Oil Pollution Prevention Certificate is valid for a period of ______.A. one year from the date of issueB. five years from the date of issueC. three years from the date of issueD. four years from the date of issueA78. Which one is NOT the ‘ clear grounds ‘ for a more detailed inspection?A. no operation procedures for the oil separatorsB. engine log book missingC. the master and the chief engineer are unable to communicate effectivelyD. absence of an up-date muster listD79. The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on_______.A. Navigation Log BookB. Engine Room Log BookC. Oil Record BookD. Muster ListB80. STCW 78/95 Convention shall apply to seafarers _______on board seagoing ships entitled to fly the flag of a PartyA. servedB. servingC. surveyedD. surveyingC81. The main purpose of port State control is not to ________.A. prevent an unsafe ship proceeding to seaB. prevent a ship threatening the marine environmentC. fine the shipsD. confirm a safe sailingC82. The bridge should inform the engine room _______before passing through congested or shallow waterway.A. 24 hoursB. 2 hoursC. 1 hourD. 15 minutesA83. When the chief engineer is in the machinery spaces, the officer in charge of the engineering watch shall ______.A. continue to be responsible for machinery space operations despite the presence of the C/EB. hand over the responsibility to the chief engineer activelyC. be responsible for the watching together with the chief engineerD. assistant the chief engineer to control the machineryC84.According to the international regulations concerning the prevention of pollutionof sea areas from ships,the disposal into the sea of all plastics is _______________A.welcomeB.admitted in some special sea areasC.prohibitedD.acceptableA85.The ship emergency plan item does not include___________usually.I lifesaving, fire fighting II first aid III abandon shipA. IIB.IIIC.II IIID.IC86. Under ISM Code, the ship to which it applies has to carry_____________A. an International Ship Security CertificateB. an International Oil Pollution Prevention CerificatC.a Safety Management CertificateD. an International Ballast Water Management CertificateD87. The objective of ISPS Code is___________A. to protect the marine environmentB. to provide a method to avoid an accidentC. to protect the ship from collisionD. to keep terrorism action away from ships.A88. According to “MARITIME LABOUR CONVENTION,2006”,The maximum hours of work shall notexceed____________A.14 hours in any 24-hour periodB. 72 hours in any seven-day periodC.10 hours in any 24-hour periodD.88 hours in any seven-day period二、关联题（关联题题干下有4个小题，每小题4个选项）第一组Port State Control(PSC) is the inspection of foreign ships in national ports for the purpose of verifying that thecondition of the ship and its equipment comply with the requirements of international conventions and that theship is manned and operated in compliance with applicable international laws.The primary responsibility for ensuring that a ship maintains a standard at least equivalent to that secified ininternaitonal conventions rests with the flag State and if all flag States performed their duties satisfactorily therewould be no need for port State control. Unfortunately this is not the case as evidenced by the many marineaccidents around the world-hence the need for additional control.The authority for exercising PSC is the national law based on relevant conventions. It is therefore necessaryfor a port State to be Party to those conventions and to have promulgated the necessary legislation beforeexercising PSC. In accordance with the provisions of the applicable conventions,Parties may conduct inspectionsof foreign ships in their ports Port State Control Officers(PSCOs).B89.The purpose of PSC is_________1) to check and inspect foreign ships2) to verify the condition of a ship in compliance with requirements of international conventions;3)to make sure that the ship is manned and operated well4)to detain shipsA 1)2) B.2)3) C.1)3) D.1234C90.Who will be responsible for ensuring that a ship maintains a standard at least equivalent to that specified ininternational conventions?A.PSCOsB.Ship ownersC.Flag statesD.Port statesA91.Before exercising PSC,a port state should ____________A.become a contracting Party and promulgate regulations for implementing PSCrm ship ownersC.establish proceduresrm shipping companiesC92. PSC inspection is implemented by_________through________A. flag states/PSCOsB.flag states/ship ownersC.port states/PSCOsD.port states/ship owners第二组Almost all failures in the fuel oil system,including the compression being to low,result in the crankshaft rotatingmore slowly if there is a failure at one or more cylinders simultaneously. If only one or two cylinders fail, and theengine is not fully loaded, the crankshaft rev/min does not decrease, the reason being that the governorensures that the remaining cylinders are loaded to a correspondingly greater extent. If the engine is alreadyfully loaded, the cylinders that are working normally become overloaded causing a smoking exhaust and higherexhaust temperatures etc. The load must always be reduced until the failure has been located and rectified. Thereasons for a cylinder suddenly working at reduced load, or failing completely, may be :1. a defective or blocked fuel injection valve.2. the fuel oil pump piston seizing in the barrel. This failure can be ascertained by trying to move the pump’stoothed rack.Defective fuel pumps must be changed.3. the compression being to low because of sticking , worn or broken piston rings.4. leaking inlet or exhaust valves5. no clearance in the valve operation gear.The reasons for the crankshaft rotating more slowly, or stopping completely,can also be:1. the fuel oil filter being blocked. This failure is identified by decreasing oil pressure after the fuel oil filter.2. valve sticking in the open position3. leaking fuel oil pipes or joints.4. water in the fuel oil5. the regulating mechanism being jammed6. the governor not funcitoning correctly.7. the electrical shutdown valve(the monitoring system)being activated.A93.This passage is mainly about___________A.the failure of reduced rpm.B.the failure of the governorC.how to ensure the constant rotational speedD.the reasons for the fuel system to shut downC94.If one or two cylinders fail in fuel oil system the crankshaft rev/min ___________.1)will invaviably decrease 2)does not decrease 3)will decrease under certain circumstancesA.1B.2C.3D.None of 1 2 3is trueD95. Which of the following is NOT mentioned as the reason for a cylinder suddenly working at reduced load?A.fuel valve failureB.failure of fuel pump discharge valvesC.too large gaps of piston ringsD.the fuel oil filter being blocked completelyA96.Which of the following is NOT mentioned as the reason for the crankshaft rotating more slowly or stopping?A.changing from heavy oil to light diesel oilB.connections leakingC.there being too much waterD.malfunction of the governor。