轮机英语试题十九

试题十九一、单项选择题：1.The lower section of a piston is called the ______.A. landB. skirtC. crownD. plate2.Which cause of the following can lead to the engine not to start on air?A. starting air pressure too highB. correct timing of starting air valvesC. three of the starting valves stuckD. the turning gear disengaged3.Which of the following can be obtained by means of an indicator card?A. the peak pressure in a cylinder.B. the temperature of the cooling water.C. the fuel consumption.D. none of the above.4.Expansion tank should be used to remove ______from cooling water.A. scaleB. sludgeC. chemicalsD. air5.Cracks in the cylinders and cylinder covers may result from ______.A. low speedB. unequal heatingC. less lubricatingD. low charge air pressure6. A lube oil filter can be used to remove most contaminants from lube oil. A contaminant whichwill remain in the lube oil after filtering is ______.A. abraviseB. fuel oilC. sedimentD. impurities7. A ship designed for carrying goods requiring refrigeration is called_____.A. REEFERB. RO/RO SHIPC. CONTAINERD.TANKER8.______is usually driven by the engine camshaft and supplies pilot air to the cylinder air startvalve.A. An air receiverB. An operating valveC. An automatic valveD. An airdistributor9.______in what position the engine stops there will always be at least one of the cylinders withits starting air valve open to admit compressed air to start the engine.A. BecauseB. Owing toC. ForD. No matter10.The pressurized air is usually cooled to increase the charge air ______.A. viscosityB. densityC. velocityD. electricity11.Load control on a diesel engine is accomplished by ______.A. regulating the speed of the turbochargerB. rotating the fuel injector pump plungerC. regulating the speed of the fuel oil transfer pumpD. changing engine timing12.When a vessel is in dry-dock, the vessel's engineers should ______.A. examine the condition of the propellerB. chip and paint allhull protection zincsC. install new docking plugs in all cofferdams(干隔舱)D. inspect the hull for hogging orsagging13.The gear and screw pumps are classified as ______.A. variable stroke pumpsB. multistage pumpsC. positive displacement pumpsD. triple-ported pumps14.Centrifugal pumps, however, can be designed with a number of impellers______ to attain alarge amount of liquid.A. in seriesB. in parallelC. assembledD. together15.The basic function of the centrifugal pump impeller is to ______.A. directly increase the pressure of the liquid being pumpedB. directly increase the velocity of the liquid being pumpedC. convert the potential energy of the liquid to kinetic energyD. separate air from the liquid being pumped16.A non-return valve in the air delivery line near to the compressor must be ______type similarto the compressor discharge valve.A. the low inertiaB. the high inertiaC. the low velocityD. the high velocity17.The bilge system has been performing well; however, the aft starboard engine room bilge-wellsuddenly fails to be pumped out. Which of the following should be done first to determine the cause?A. Open the bilge pump for inspection.B. Remove each of the manifold valves.C. Remove only the manifold valve to the affected bilge-well.D. Attempt to pump out another bilge well to determine if the entire system is affected.18.Every liquid has a pressure at which will vaporize and this pressure varies with temperature.The word “ which” means ______.A. a liquidB. a pressureC. a temperatureD. none of the above19.Excessive alkalinity of the water in an auxiliary boiler can cause ______.A. caustic embrittlement（脆化）of the boiler metalB. acidic corrosion of the boilermetalC. hard scale deposits on the boiler tubesD. etching （腐蚀）of the heatexchange surfaces20.The purpose of the safety relief valves installed on an auxiliary boiler is to ______.A.relieve excess fuel oil pressure during the “ off ” fire cycleB. admit water to the dry pipeC. throttle the forced draft fan output for proper combustionD. reduce excess steam pressure in the boiler21.Fusible plugs are installed in fire-tube boilers to ______.A. provide a means of draining the boilerB. warn the engineer of low water levelC. cool the crown sheet at high firing ratesD. open the burners' electrical firing circuits22.In a purifier changing to a gravity disc with larger hole diameter will move the interfacetowards the ______.A. bowl peripheryB. bowl centerC. upper surfaceD. lower surface23.Preventive maintenance _____.A. should not be carried out during the watchesB. can only be carried out in portC. is a kind of maintenances carried out prior to the occurrenceD. is a kind of maintenances carried out after the occurrence24.When started, a complete oily water separating unit is first filled ______. The oily watermixture is then pumped through the inlet pipe into the coarse separating compartment.A. with dirty waterB. with clean waterC. by oily waterD. by mixed water25.Here some oil in the oily water separator, as a result of its lower ______,will separate and riseinto the oil collection space.A. temperatureB. viscosityC. densityD. velocity26.Burning diesel oil should be treated as which class of fire?A.Class ‘ A ’B.Class ‘ B ’C.Class ‘ C ’D.Class ‘ D ’27.If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be ______.A. contaminated fluidB. pitted thrust ringsC. worn pintle bearingsD. obstructedsuctions passage28.The hand steering is a method by which the motion of the rudder is controlled with ______.A. a motor-driven steering wheelB. a pneumatic steering wheelC. a hand-driven steering wheelD. an electric steering wheel29.With reference to rules governing steering gear, which one of the following rules is incorrect ?A. It is required that all ships are provided with two independent steering gear systems that isonemain and one auxiliary.B. The auxiliary gear could be power operated in passenger ships.C. The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigablespeed.D. All moving parts of the steering gear must be guarded against any possible damage.30.Because of the reduced ______in the vacuum boiling evaporator, some of the sea water boilsas it flows through the tubes.A. temperatureB. water levelC. pressureD. rate of flow31.A dirty intercooler on the ship service air compressor will result in ______.A. decreased compression ratioB. higher than normal power consumptionC. un-loader malfunctionD. water in the lubricating oil32.The ______stage air compressors are widely used on board the ship.A. singleB. IIC. IIID. multiple33.Sludge may form in the crankcase of an air conditioning compressor as a result of ______.A. bubbling refrigerantB. overheating and oxidationC. lowered operating temperaturesD. reducing the cloud or flash point34.Machinery operating features are designed to help conserve（保存）energy. Which of thefollowing results will not contribute to energy conservation?A. Reduction of friction.B. Insulation of hot surfaces.C. Lubrication of moving parts.D. Elevation (升高)of cooler outlet temperatures.35.When adding oil to a refrigeration system, precautions must be taken to ensure that ______.A. the compressor suction pressure is not too highB. all air is purged from the pump and charging fittingsC. the high pressure cutout switch is held open to prevent accidental startingD. the condenser is completely shutdown first36.Air entering an air-cooled refrigeration system is indicated by ______.A. frosting of the liquid lineB. higher than normal head pressureC. a clear sight glassD. abnormally cold reefer boxes37.Which of the statements listed concerning heat transfer is correct?A. Heat is always transferred at a constant rate.B. Heat transfer rate increases as temperature difference increases.C. The rate of heat transfer is not affected by temperature difference.D. The high temperature region is known as a heat sink.38.______is a machine by which electrical energy is transformed into mechanical energy.A. An alternatorB. An electric motorC. A diesel engineD. A mainswitchboard39.Which of the following statements is true concerning all three-phase alternators?A. Each has three separate but identical armature windings acted on by one system of rotatingmagnets.B. Each has one armature winding acted on by three identical but separate systems of rotatingmagnets.C. All three-phase alternators are designed to operate with a 0.8 leading power factor.D. The three phases always provide power to the load through three sets of slip rings andbrushes.40.Universal motors will operate on AC or DC current, and are generally found in ______.A. portable toolsB. large pump motorsC. turbo electric main motorsD. forceddraft fans41.Which of the following should be the FIRST step in removing a generator from paralleloperation?A. Trip the generator off the switchboard.B. Turn off all electrical equipment.C. Remove the load from the 'off going' generator.D. Increase the cycles of the generator staying on the line.ually the panels are interlocked with ______so that the devices can be made dead beforethe doors are opened.A. protective earthB. isolatorsC. ground switchD. circuit-breakers43.The operating medium for control systems may be ______.A. compressed airB. hydraulic oilC. electricityD. all of the above44.The most common type of containment device for spilled oil on the water is the use of ______.A. strawB. boomsC. skimmersD. chemical dispersants45.The ______is a crystal which, under pressure, produces an electric current which varies withthe pressure.A. alternatorB. glass thermometerC. burdon tubeD. piezoelectric（压电的）pressure transducer46.In order to accurately measure very low pressures, which of the instruments listed should beused?A. Compound gageB. Bourdon tubeC. ManometerD. Deadweight gage47.When the current flow through a copper wire increases, its ______.A. resistance will decreaseB. insulation will burnC. temperature will increaseD. conductivity will increase48.The system will include various ______such as low tank level alarms and remote operation oftank outlet valves in the events of a fire.A. switchesB. panelsC. alarm unitsD. safety devices49.Electrically operated safety devices on auxiliary diesel engines function to stop the engineby_____.A. increasing the volume of intake airB. shutting off the fuel supplyC. increasing the engine back pressureD. over-speeding the engine50.In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should betaken off and the piston should be______.A. craned outB. rolled outC. lifted outD. turned out51.Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will______.A. reduce engine horsepower outputB. aid in silencing the exhaust noiseC. increase the mean effective pressureD. contribute to effective cylinder scavenging52.Hearing a strong noise, ______at once.A. the engine stoppedB. the engine was stoppedC. he stopped the engineD. he had stopped the engine53.Poor combustion in a diesel engine can be caused by______.A. high compression pressureB. low intake air temperatureC. low exhaust pressureD. high scavenge air temperature54.An automated diesel engine should normally shut down due to______.A. low lube oil temperatureB. high ambient air temperatureC. low lube oil pressureD. high exhaust system back pressure55.Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits,may cause______.A. low compression pressureB. increased piston wearC. increased cylinder lube oil consumptionD. poor contact between compression rings and liner56.During repair, lubrication lines and orifices must be______.A. taken awayB. engagedC. connectedD. sealed off57.The bearing cap and shell are replaced and tightened up until______.A.the “ nip” is zeroB.the “ nap” is zeroC.the “ gap” is correctD.the “ clearance” is correct58.A built-up exhaust valve is one in which______.A. the stem and heads are made of different materialB. low-alloy steel is used throughoutC. a replaceable valve disk is welded to the headD. the self-centering action comes from motion of the valve stem in the guide59.A centrifugal pump can’t suppl y water after starting. You should check______.A. discharge valveB. power supplyC. packing glandD. bearing lubrication60.______, the engine must be stopped immediately.A. Should knocking occurB. If knocking occurC. Should if knocking occursD. If occur knocking61.Which of the motors for the devices listed below is fitted with an instantaneous overload relay?A. FanB. PumpC. WinchD. Machine tool62.Oil mist detectors are usually used on board to detect oil mist density within______.A. the engine crankcaseB. the engine scavenge boxesC. drain tanksD. fuel tanks63.The resistance of electric wire will decrease as its______.A. length increasesB. cross-sectional area increasesC. temperature increasesD. percent of metallic purities increases64.The______ is used to measure voltage.A. ammeterB. voltmeterC. wattmeterD. frequency meter65.When the ship is in restricted visibility, the officer in charge of the engineering watch shallensure that______. I. bridge orders relating to changes in speed or direction of operation are immediately implemented. II. auxiliary machinery used for maneuvering is readily available.III. permanent air or steam pressure is available for sound signals.A. I+IIB. I+IIIC. II+IIID. I+II+III66.The value of GM still remains one meter, meanwhile we can pump the ballast waterto______the ship on even keel.A. makeB. putC. keepD. get67.Your ship’s certificates show that you did not do renewing work for certificate. Allcertificates have expired a few days before. Thus, your ship is______. It follows therefore that she will______.A. seaworthy / be fined in our portB. un-seaworthy/ be disassembled in ourportC. seaworthy / be assembled in our portD. un-seaworthy / be detained in our port68.The order “Bow thrust stop.”means“______”.A. Bow thrust full to portB. Bow thrust full to starboardC. No bow thrust revolutionsD. No stern thrust revolutions69.A tank has been sealed and unventilated for a long period of time. Which of the followingconditions does this indicate?A. The tank is safe to enter.B. The tank is especially dangerous to enter.C. Carbon monoxide is present.D. Water vapor present when the tank was sealed hasoxidized.70.A combination combustible gas and oxygen indicator is an instrument that measuresthe______of both combustible gas and oxygen ; each is indicated on a separate meter.A. puritiesB. combinationsC. concentrationsD. filters71.When the general alarm is sounded continuously, the engine room personnel should______.A. proceed to their man overboard stationsB. start the fire pumpC. put on lifejackets and go to their abandon ship stationsD. secure the propulsion diesel engines and evacuate the engine room72.One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed spaceis______.A.the ‘ snow ’ which is sometimes discha rged along with the gas is toxicB. prolonged exposure to high concentrations of CO 2 gas causes suffocationC. rapid dissipation of the CO 2 vaporD. the CO 2 gas is lighter than air and a large amount is required to extinguish a fire near thedeck73.The ______Convention is the first to establish basic requirements on training, certificationand watch-keeping for seafarers on an international level.A. STCW78B. STCW95C. SOLAS74D. SOLAS8874.When viewed from astern, if the propeller revolves in a clockwise direction when going ahead,it is known as______.A. ahead directionB. astern directionC. right-handedD. left-handed二、关联题（每组关联题题干下有4个小题，每小题4个选项）第一组：Battery maintenance is substantially（充分的）the same for both types of battery. Cell tops must be kept The hoisting of the cargo is effected by a hoisting winch driven by ahydraulic motor that provides a constant torque in both directions of rotation and at all speeds within the regulation range of the motor. The winch is equipped with a mechanical belt brake that acts on the outside of the rotating motor housing. During operation, the brake is released by means of oil pressure which compresses a spring. The crane jib is raised and lowered by means of a luffing winch is constructed in a similar manner to the hoisting winch.The pumps are axial piston pumps and are driven by a common 3-phased asynchronous motor at a constant speed of rotation. The capacity of the pump is changed by turning theswash-plate. The crane is turned by a hydraulic motor of the same type as that describedabove, in that the rotor turns a pinion which engages with a toothed ring on the crane housing.An oil cooler is used to remove the heat generated in the oil during the operation of the crane. The system is also provided with a pre-heater for heating the oil in cold weather. If the temperature of the oil reaches 85C, a thermostat in one of the oil lines switches off the electric motor.Pressure relief valves are built into the system to protect the system and the crane against excessive loads. All moving parts in the hydraulic system are lubricated by means of the oil in the system..The crane housing, which is a welded construction on a rigid base-plate, contains all the mechanical machinery, the hydraulic system and the electrical equipment. The top of thecrane housing and the jib carry blocks for wires for the hoisting of the cargo and the raising of the jib. All of the blocks have enclosed ball bearing.75.Which of the following is true about the hoisting of the cargo?A. an electric motor provides a constant torque.B. an hoisting winch is used.C. a mechanical brake acts on the hoisting cable.D. All of the above are true.76.The pumps _____.A. are driven by variable speed electric motorsB. turn the craneC. may deliver variable capacity by turning the swash plateD. B and C are true77.Which of the following is true about the oil in the system?A. It can be cooled in a cooler.B. Its temperature can exceed 85 degrees centigrade in no account.C. It can be used to lubricate moving parts.D. All of the above are true.78.Which of the following is true?A. The mechanical brake is released by means of a strong spring.B. At least three hydraulic motors are fitted to the system.C. The crane housing is of forged construction.D. The blocks are installed on the base-plate.三、中译英（共2题，请将答案写在答题纸上）79.主机3、4和7号缸套吊出检查和测量。