轮机英语考试题

1、轮机英语 试卷代码 805一单项选择题D1. In order to concrol thermal stresses ,some types of modern engines use pistons with _A heavy wall and intensive cooling B heavy wall and no cooling Cthin wall and no cooling D thin wall and intensive cooling B2. The average pressure exerted on a piston during each power stroke

2、 is termed A indicated B ean effective pressure C exhaust back pessure Dcompression pressure A3. The ignition quality of a diesel fuel is indicated by the_A cetane number B volatility point C viscosity index Doctane number B4. A piston in a four stroke cycle disesel engine makes four stroke during e

3、ach _A crankshaft revolution B mechanical cycle of operation C period of two cobustion cycles D cycle of two events C5. Crankshafts of medium speed engines are _from a single piece of steel A unusually solid welded B never be solid forged C almost invariably D almost invariably be welded B6 .The sta

4、rting 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 BDC D7 .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 caps

5、B8 .Compared to four stroke cycle engines ,two stroke /cye diesel engines have the disadvantage of _A less even torque B 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 corr

6、ect viscosity for combustion A The viscosity regulator B The temperature controller C The flow metet DThe pressure switch B10. 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 wallsC11 A large

7、,low speed ,main propulsion diesel engine uses sea water to directly cool the _A cylinder heads B exhaust valves C scavenging air D injectors D12. In a rubocharger ,inlet air velocity is increased in the _A inlet nozzle ring B stationary diffuser passages C compressor outlet volute D rotating impell

8、er vanes C13 .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 rings B14. In a simple mechanical governor ,the _A centrifugal force rotates the ball-head B Flyweight centrifugal force is balanced by spr

9、ing force C flyweight centrifugal force is balanced by hydraulic pressure Dspeeder spring alone actuates the fuel control rod C15. A pyrometer is an instrument commomly used to measure _A cylinder pressure B flame intensity C exhaust gas temperature D crankshaft axial aliganment B16 .After starting

10、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 perssure C17. 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 re

11、lief valve C a fusible plug D a bursting cap A18. What preventative maintenace 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 an

12、d foreign matter.C19 .In reducing engine speed to an efficient propeller speed by the use of reduction gears ,_Aspeed 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 increased A20 .W

13、hich of the following statements concerning fire-tube boilers is correct ?A Combustion gases flow through the tubes B 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 ma

14、in engine A water B oil C heat D steamD22 .The water level in a steaming auxiliary boiler will always _A rise when the steam pressure is in creased B remain constant as long as the feed pump operates C fall when the steam pressure is decreased D vary as the steam demand changes D23. when lighting of

15、f 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 atomizing steam pressure D Water in the fuel oil B24 .If the feed pump for an auxiliaty boier fails to deliver the feed water to the boiler ,the cause may be _A High

16、steam pressure in the boiler B abnormally high feed-water temperature C abnormally high boiler watet temperature D steam demand exceeding feed pump capacity A25.Through a _pump,the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chamb

17、ers.A.positive displacement B.ejector C.centrifugal D.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 shaft C.in place of mechanical seals D.

18、in place of lantern ringsD27.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 valve B.A globe stop valve C.A check valve D. A butterfly valveA28.Centrifugal pumps,used to handle hot liquids, must have a minimum flow th

19、rough them under all operating conditions.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 gase

20、sB29.If you heard a cracklingnoise in a centrifugal pump, the most probable cause of the problem would be _A.insufficient speed B.cavitationC.excess discharge pressure D.excessive net positive suction headA30.In the process of _,liquid changes into gas.A.evaporation Bfrosting C.condensing D.compress

21、ingB31.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 switchD32.A purge recovery system is used in a central air conditioning or refrigeration system to _ A.purge lube oil from the liquid ref

22、rigerant B.recover water purged from the systemC.separate foul gases from the receiver D.purge non-condensable gases without losing refrigerantA33.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 be

23、lts C.high line voltage D.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 loca

24、l requirements have to be observedA35.The following measures can be used to improve oily water separators separating effect except _.A.overhauling every two year B.working at intervalsC.renewing filtration material D.properly heatingC36.disposal of all kinds of garbage but _Listed as below is prohib

25、ited within Special AreasA.comminuted or ground papers,rags,glass,metalB.plasticsC.food waste comminuted or ground Dincinerator ashC37.when does auxiliary burner of incinerator put into opertaion?I.start incinerator when it is coldII.little waste oil for dealing with III.plenty of waste oil for deal

26、ing withIV.the water and impurity in sludge are too muchV.the temperature in incinerator is lowVI.dealing with little solid rubbishA.II+III+V B.I+II+III+IV C.I+IV+V+VI D.I+II+III+VIA38.bacteria which live _are said to be aerobic.A.in the presence of oxygenB.without oxygen C. in the presence of nutri

27、tionD.without nutritionC39.when centrifuging heavy fuel oil,an important factor to consider is the _.1.fuel rate 2.viscosity of fuel oilA.1 B.2 C.12 D.neither 1 nor 2 is correctB40.to ensure lube oil purifier working in normal conditon,the interval between twp sludge discharging should not exceed _

28、hours.A 2 B 4 C 5 D 6D41._can not cause oil flow from water outlet of self cleaning purifier.A.oil temperature too high B.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 cooli

29、ng,the cooling phase of production is usually called_.A evaporation B distillation C 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

30、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 valve B.direction control valveC.stop valve D.pressure control valveC45.cargo handling unit is rated according to the _to be lifted.A.carg

31、o crane B.jib C.safe working load D.oil pressureD46.the crane is usually mounted on a pedestal to offer adequate _to the operator.A.time B.place C.length DvisbilityA47.proper internal lubrication of a hydraulic anchor windlass left idle fro extended periods can be accomplished by_.A.performing a che

32、ck 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 winches B.mooring winches C.windlasses

33、D.cargo hatchesD49.the major source of chemical contaminants in hydraulic fluid is _.A.microscopic steel shavings B abrasive wasteC.anti-oxidant compounds D.oxidation by-productsA50If you install a new hydraulic hose in a hydraulilc system, the hose must be long enough to allow for contraction to pr

34、event_.A. failure of the hydraulic hose B. excessive flow through the lineC. friction in other areas of the hydraulic system D. overheating of the hydraulic fluid B51. 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. c

35、losed circuit B52. 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. outpul voltage D53. The operation of paralleling two alternators requires the voltages to be _and a

36、lso in phase.A. zero B.eliminated C. different D, equalB54. The frequency of an AC generator is controlled by the _.A. rheostat . B.governor C.exciter D. capacitor B55. A motor enclosure which protects against falling liquids is classified as _.A. water-proof B. drip-proof C. spray- tight D. spray-p

37、roofD56. _are supplied with electricity by main switchboard directly. A. Suez Canal searchlight,air compressor and air conditioning compressorB. Air compressor, boiler blower and refrigeration plant C. Boiler blower, Suez Canal searchlight and refrigeration plantD. Suez Canal searchlight and boiler

38、blower D57. _is not installed on the emergency switchboard.A. Ammeter B. Voltmeter C. Wattmeter D. Synchroscope D58. 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 trips A59. Moist

39、ure in a D.C. motor would cause _.A. short circuit B. speed up C. slow down D. huntingD60. The part of a fuse that melts and opens the circuit is made of _.A. copper and antimony B. steel and babbittC. aluminum or beryllium alloy D. zinc or an alloy of tin and leadB61. The main purpose of an electri

40、c space heater installed in a large AC 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 startingB62. Sparking at the brushes of a running

41、 motor could be an indication of _.A. normal operation B. a dirty commutator C. increased brush capacity D. water vapor absorptionB63. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to _.A. test the staring system B. remove conden

42、sation from the cylinders C. check the compression D. 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 engineers order C. the main parameters of main and auxiliary equi

43、pments.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 syst

44、em parameters C66. Which of the listed conditions can be considered as the single greatest cause of accidents?A. Speed B. Excessive knowledge or skillC. Human error D. ExcitementA67. On a tank vessel, which of the following substances would be burning in a class B fire?A. Oil B. Wood C. Rags D. Elec

45、trical wiringD68. 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 binD69. Which of the fire extinguishers listed is to be weighed annually and sent ashore for rec

46、harging if the weight loss exceeds 10% of the weight of a full charge?A. Foam B. Soda acid C. Dry chemical D. Carbon dioxide B70. 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 pr

47、oceed 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 vent B. pump out the

48、 tank C. activate the fixed CO2 system D. cut off the heating coils C72. 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 offA73. _, where minor repairs are carried out with a shi

49、p in service, often during a stay in port. This may be remote from a ship repair site.A. Voyage repairs B. Routine docking C. Damage repairs D. ConversionB74. 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 annu

50、al surveyA75. In the initial survey, _ compiles the survey report and fills in certificate.A. surveyor B. chief engineer C. administrator D. company superintendentD76. 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-i

51、n-chargeC. completely black it out and make the correct entry alongside D. draw a single line through the wrong entry and initial it B77. 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

52、 years from the date of issue D. 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 separators B. engine log book missing C. the master and the chief engineer are unable to communicate effectivelyD. absence o

53、f 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 the _.A. Navigation Log Book B. Engine Room Log BookC. Oil Record Book D. Muster ListB80. STCW 78/95 Convention shall apply to seafarers _on board seagoing ships e

54、ntitled to fly the flag of a Party.A. served B. serving C. surveyed D. surveying C81. 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 ships D. confirm a safe sailingC82. The bridge should inform the engine room _before passing through congested or shallow waterway.A. 24 hours B. 2 hours C. 1 hour D. 15 minut