海事局轮机机考必考题

1It is during _____ that work energy is being put into the engine; during the other 3 strokes of the piston, the engine has to do the work.A. the suction strokeB. the compression strokeC. the expansion strokeD. the exhaust stroke2The ______Convention is the first to establish basic requirements on training certification and watch-keeping for seafarers on an international level.A. STCW78B. STCW95C. SOLAS74D. SOLAS883The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the _________.A. Navigation Log BookB. Engine Room Log BookC. Oil Record BookD. Muster List4The additional mark _______ in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.A. BRCB. MCCC. AUT-0D. AUT-15The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated.A. for atomizingB. for centrifugingC. in a storage tankD. in the re-circulating line6Using a file without a handle may result in ________.A. your work becoming roundedB. injury to your handC. overheating of the fileD. pinning7 “Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a _______.A. substandard shipB. standard shipC. over-standard shipD. reference ship8Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the _______.A. double bottom fuel oil tank temperatureB. heater supply steam flowC. pressure of the fuel supplied to the burnersD. at temperator steam flow in the heater discharge circuit9Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?A. SensitivityB. PowerC. Speed droopD. Compensation10To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?A. Speed limiting governorB. Over-speed governorC. Over-speed tripD. Over-speed relay11 By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a________.A. tachometerB. pyrometerC. dynamometerD. calorimeter12 Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?A. ImpellerB. CompressorC. After-coolerD. Exhaust differ13The condensers located in various stages of a flash evaporator are cooled by___.A. distillateB. seawaterC. brineD. air14The cetane rating of diesel fuel is an indication of the ________.A. ignition quality of the fuelB. calorific value of the fuelC. flash point of the fuelD. rate of fuel consumption15Diesel engine air start system check valves are opened by ________.A. an air start camB. cylinder compression pressureC. starting air pressureD. valve springs16Cold weather starting of a diesel engine may be made easier by .A. decreasing the compression ratioB. using a special fuel having a high ignition temperatureC. increasing the starting air supplyD. heating the jacket water17Flame failure in an automatically fired auxiliary boiler can from a/an _________.A. incorrect electrode settingB. incorrect nozzle positionC. clogged fuel nozzleD. broken high tension lead18Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?A. Sub-cooled liquidB. Sub-cooled vaporC. Superheated vaporD. Liquid19A purge recovery system is used in a centrifugal air conditioning or refrigeration system to_____.A. purge lube oil from the liquid refrigerantB. recovers water purged from the systemC. separate foul gases from the receiverD. purge non-condensable gases without losing refrigerant20For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined? A. the temperature and flow quantity of the exhaust gas from M.EB. the quantity of steam demandedC. the rotary speed and the cooling water temperature of main engineD. efficiency of M.E turbocharger21____ are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.A. anaerobic bacteriaB. aerobic bacteriaC. air bubblesD. disinfection chemicals22____ connectors hold best if a wire is accidentally pulled or a connection becomes loose.A. Ring typeB. Fork typeC. Spade typeD. Push on pull off type23The shipboard oil pollution emergency plan will be invalid after ____.A. one yearB. two yearsC. four yearsD. five years24Which one is NOT the ‘clear grounds’ for a mor e detailed inspection?A. the master and the chief engineer are unable to communicate effectivelyB. serious corrosion on the hullC. damaged sanitary pumpD. one page missing in the oil record book25Under MARPOL Code the ship to which it applies has to carry ____.A. an International Ship Security CertificateB. an International Oil Pollution CertificateC. a Safety Management CertificateD. an International Ballast Water Management Certificate26Engine parameters shall be corresponded to NOx Technical Files. This is required by ____. A. MARPOL Annex III B. MARPOL Annex VI C. MARPOL Annex V D. MARPOL Annex VI 27If separating effect is not good, which measure should be taken ____.A. working at intervals and properly heatingB. warming up to 70℃, increase water supply flowC. improving impulse of water supplyD. reducing water supply flow28When does auxiliary burner of incinerator put into operation? I. start incinerator when it is cold II. the sludge for dealing with is little III. the sludge for dealing with is large IV. the water and impurity in sludge are too much V. the temperature in incinerator is low VI. dealing with little solid rubbishA. I+II+III+VB. I+II+III+IVC. I+IV+V+VID. I+II+III+VI29One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is ___ .A. seal water supply be cut offB. make up water supply be cut offC. oil outlet valve closed or not open sufficientlyD. the flow rate of oily water is too much30____ is not installed on the main switchboard.A. Ammeter and changeover switchB. Power factor meterC. SynchroscopeD. Reverse sequence relay31During the diesel engine running, the water level of F.W expansion tank should normally kept in the ____ level of glass tube.A. the highestB. above 3/4C. 1/2 -3/4D. the lowest32Which of the following items don’t belong to dock repair works?A. making the repair list, booking spare parts and special tools for the dock repairB. shutting off all of the S.W valves to outboardC. the sketches or diagrams used for the dock repairD. cleaning up the oil tank and boiler before enter the dock33The treatment of the fuel oils involves storage, heating, filtering and ______.A. centrifugingB. pressurizingC. atomizationD. igniting34If two A.C. generators are to be operated in parallel, the load is distributed evenly by ____.A. means of rheostat the governor settingsB. a balance coil excitationC. adjusting the governor settingsD. changing excitation35The 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 sailing36To proceed to the assistance of a ship in distress is ______.A. an obligation for masters of passing by shipsB. optional for masters of passing by ships when the weather is fineC. prohibited by the Convention SOLAS, 1974, as amendedD. prohibited by the convention STCW 78/9537According to the way the energy of the exhaust gases is utilized, pressure-charging can be divided into two main systems, namely, the constant-pressure system and ______.A. the pulse-phase systemB. the pulse Doppler systemC. the pulse systemD. the pulse interval system38For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the ______.A. bowl peripheryB. bowl centerC. upper surfaceD. lower surface39One factor that determines the frequency of an alternator is the ______.A. number of turns of wire in the armature coilB. number of magnetic polesC. strength of the magnets usedD. output voltage40______is a precaution which contributes to avoiding trouble under normal operating conditions.A. Constant inspectionB. Keeping constant loadC. Remaining constant temperatureD. Varying speed41 Convection spreads a fire as a result of ______.A. transmitting the heat of a fire through the ship's metalB. burning liquids flowing into another spaceC. heated gases flowing through ventilation systemsD. the transfer of heat across an unobstructed space42fireman's outfit carried onboard cargo vessels, must have a ______.A. canister-type gas maskB. fresh-air breathing apparatusC. self-contained breathing apparatusD. combustible gas indicator43The dew point of air is reached when the wet bulb temperature is ______.A. twice the dry bulb temperatureB. 10℃above the dry bulb temperatureC. 5℃above the dry bulb temperatureD. equal to the dry bulb temperature44Oily water separators are used to ensure that ships don't discharge oil when pumping out______.A. ballast waterB. boiler waterC. bilge waterD. sewage water45Which is the pollution prevention equipment?A. booster pumpB. evaporatorC. incineratorD. cooler46Fires involving combustible metals are classified as ______.A. class 'A' firesB. class 'B' firesC. class 'C' firesD. class 'D' fires47CO2 extinguishes a fire by __________.A. a blanket of bubbles formed on the surface of the fireB. smotheringC. isolating the heat from the fuelD. cooling48 “Inability to provide for the first watch at the commencement of a voyage and for subsequent relieving watches persons who are sufficiently rested and otherwise fit for duty.” is considered to be one of the detainable deficiencies(缺乏) under ______.A. the SOLAS ConventionB. the MARPOL ConventionC. the STCW ConventionD. the LOAD LINE Convention49 Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion?A. hydraulic pumpsB. valvesC. hydraulic cylindersD. hydraulic motors 50circuit breaker and a fuse have a basic similarity(类似) in that they both ______.A. can be reset to energize the circuitB. should open the circuit when overloadedC. will burn out when an over current flow developsD. should short the circuit when overloaded51 The projection on a shaft designed to change circular motion into up and down or back and fore motion is called ______A. wheelB. crankshaftC. running gearD. cam52 Throttling in the ________ line of a centrifugal pump involves the risk of the pump cavitationA. suctionB. exhaustC. pressureD. discharge53. In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?A. Distiller air ejector cooling mediumB. Saltwater heater dischargeC. First-stage internal feed boxD. Second-stage internal feed box54 .The abbreviation ”MIP” stands for____,A. middle indicating pressureB. mean indicated pressureC. mean pitchD. middle indicated power55.In a compression refrigeration plant, the hot, high pressure refrigerant gas is cooled by the sea water and becomes liquid in the_______.A. compressorB. condenserC. throttle valveD. evaporator56. Before a marine diesel engine is started the cylinders and pistons must be____.A. cooled to appropriate temperatureB. warmed up gradually to appropriate temperatureC. opened up and renewedD. ground and polished57. ______of different thickness are inserted between the shells to enable adjustment of the bearing clearness.A. ScrewsB. FilmsC. DiesesD. Shims58. The process of adding moisture to air to increase the relative humidity is known as______A. sublimation B desiccation C. humidification D. miniaturization61 Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?A. StationaryB. Full floatingC. Semi-floatingD. Free rolling62 Fuel injected into a diesel engine’s cylinder is ignited by__________.A. the heat compressed fuel/air mixture in the cylinderB. the fuel igniterC. the fuel injectorD. the fuel pump63 Since the burning or combustion takes place within the engine itself ,the engine is known as__________.A. a fire-tube boilerB. an internal combustion engineC. an external combustion engineD. an internal combustion generator65 Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce.A. cold corrosion of the nozzlesB. fuel viscosity for better atomizationC. carbon accumulation on the nozzlesD. fuel detonation in the cylinders66 After the engine is warmed, we should ___________the turning gear before starting up the engine.A. take inB. put inC. take outD. put up67 The transmission system is made up of shafts, bearings, and finally the _______.A. thrust shaftB. propellerC. reduction gear boxD. train transmission68 When a vessel is in dry-dock, the vessel’s engineers should ______.A. examine the condition of the propeller.B. chip and paint all hull protection zincsC. install new docking plugs in all cofferdamsD. inspect the hull for hogging or sagging69 The amount of heat released by steam when it changes to water at the same temperature is called _______.A. latent heat of condensationB. latent heat of vaporizationC. latent heat of saturationD. sensible heat of condensation70 The pump has a constant stroke of fuel delivered is regulated by rotating ______ which has a specially arranged helical groove cut into it.A. the pump cylinderB. the pump camC. the pump plungerD. the pump roller71 Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump is a result of ________.A. cavitationB. water hammerC. fluid frictionD. steam knock73 The separation of impurities and water from _______ is essential for good combustion of diesel engines.A. lube oilB. fuel oilC. turbine oilD. grease74 In an oily water separator the oil will travel _____ to the oil collecting spaces.A. upwardsB. downwardsC. outwardsD. forwards75In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?A distiller air ejector cooling mediumB saltwater heater dischargeC first-stage internal feed boxD second-stage internal box76 In a ordinary cargo crane, _______ is fitted to rotate the crane.A. the slewing motorB. the luffing motorC. the hoisting motorD. none of the above77Among the basic categories of equipment, which of the following are used to convert hydraulic energy into continuous rotary motion?A. Hydraulic pumpsB. V alvesC. Hydraulic cylindersD. Hydraulic motors78. An accidental path of low resistance, allowing passage of abnormal amount of current is known as a/an__________________--.A open circuitB short circuitC polarized groundD ground reference point79 Equal power factors on paralleled AC generators are maintained by an automatic_________.A voltage regulatorB reverse power relayC reverse current relayD governor control switch80. When two AC generators are being paralleled, the breaker should be closed with the synchroscope pointer rotating in the_________________.A “slow” direction, just before the 12 o’clock positionB “fast” direction, just after the 12 o’clock positionC “fast” direction, just before the 12 o’clock positionD “slow” direction, just after the 12 o’clock position81. The Company should ensure that ______ documents are promptly removed.A. absoluteB. updatedC. outdatedD. new82. 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 room83 what type of valve is used to direct the flow of hydraulic fluid?A. relief valveB. direction control valveC. stop valveD. pressure control valve84The ISPS Code consists of a mandatory section-Part A, which shows .A. the detailed security-related requirementsB. guidelines to meet security-related requirementsC. the detailed security-related requirements and the guidelines to meet themD. how to run a shipping company considering the potential terrorism action85When anchoring in open anchorage, chief engineer should consult with captain _ _ .A. if the ship must be stand byB. if M.E. should be stoppedC. if keep-watching as in voyageD. if the ship must anchor two anchors86As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?A. Exhaust temperaturesB. Raw water pressureC. Lube oil pressureD. Air box pressure。