轮机英语大证考试真题42期.doc

中华人民共和国海事局2007年第1期海船船员适任证书全国统考试题(总第42期) 科目：轮机英语 试卷代号：805适用对象：无限、近洋航区3000KW及以上船舶二/三管轮（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。一、 单项选择题1. The _engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm. A. four-stroke B. two-stroke C. slow speed D. reversible 2. The discharge flow of a reciprocating pump is _.A. steady B. in pulsation C. continuous D. large3. The cetane number of a diesel fuel oil indicates its _. A. viscosity B. acid content C. heating value D. ignition quality 4. Always ensure that the turning gear is_, even at the quay, the wave from other ships may turn the propeller and thus the engine. A. disengaged B. engaged C. assembled D. disassembled5. Camshafts are usually driven by timing gears or _. A. push rods B. chain drives C. rocker arms D. flywheels 6. The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices, during_. A. the upward stroke B. the downward strokeC. the power stroke D. the suction stroke 7. The total starting air capacity required for reversible main engines is to be sufficient for a least _. A. six consecutive(连续的) starts B. eight consecutive starts C. ten consecutive starts D. twelve consecutive starts 8. A dirty diesel engine oil filter element can best be detected by _.A. visual inspection of the elementsB. the pressure drop across the filterC. high lube oil sump temperature D. decrease in oil viscosity from the filter9. Before a marine diesel engine is started the cylinders and pistons must be _. A. cooled to appropriate temperature B. warmed up gradually to appropriate temperature C. opened up and renewed D. ground and polished 10. A controllable pitch propeller on a diesel driven vessel eliminates the need for _. A. friction clutches B. disconnect clutches C. reversing gears D. reduction gears 11. The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust _.A. gas composition B. gas temperature C. pressure D. timing 12. _continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity (不透明)measuring track. A. The oil mist detectors B. The smoke detectors C. An oily water monitor D. Oil discharge monitoring and controlling system13. The water in a steaming auxiliary boiler should be tested daily for _.A. dissolved oxygen B. chlorides C. sludge D. dissolved nitrogen 14. A firebox explosion in an automatically fired auxiliary boiler may be the result of _. A. excessive purging before lighting off B. insufficient trail for ignition period C. a faulty transformer in the ignition circuit D. insufficient purging after lighting off 15. A feed pump for an auxiliary boiler might lose suction if the _. A. boiler water level is low B. feed-water is too hot C. boiler steam demand is low D. feed-water is too cold 16. The gear and screw pumps are classified as_. A. variable stroke pumps B. multistage pumps C. positive displacement pumps D. triple-ported pumps 17. The pressure of a liquid leaving the pump can be referred to as the _.A. total head B. discharge headC. net positive suction head D. suction head18. Which of the valves listed will be cycled from fully open to fully closed 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 valve 19. A pump shaft that is bent or distorted should normally be _.A. repaired by a suitable welding processB. straightened by applying heat and torsionC. reconditioned by metallizing and machiningD. replaced with a satisfactory spare20. A centrifugal pump may fail to deliver water when first started if the _. A. water seal pipe is plugged B. pump is not primed C. seal ring is improperly located D. impeller is flooded 21. Which of the following conditions must exist for heat to flow from one object to another? A. The two objects must be in physical contact. B. The two objects must be the same size. C. There must be an existing temperature differential. D. There must be an existing weight differential. 22. The dew point of air is reached when the wet bulb temperature is _. A. twice the dry bulb temperature B. 10 above the dry bulb temperature C. 5 above the dry bulb temperature D. equal to the dry bulb temperature 23. If air at 95 dry bulb temperature and 50% relative humidity is conditioned to 75 dry bulb temperature and 50% relative humidity, it is an example of _. A. cooling only B. cooling and humidifying C. cooling and dehumidifying D. adiabatic(绝热的) cooling 24. In order to achieve greater dehumidification(除湿) with an air conditioning system, you should _. I. reduce the cooling coil temperature II. increase the re-heater temperature A. I only B. II only C. Both I and II D. Neither I nor II 25. Oily water separators are used to ensure that ships dont discharge oil when pumping out _. A. ballast water B. boiler water C. bilge water D. sewage water 26. When started, a complete oily water separating unit is first filled_. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment. A. with dirty water B. with clean water C. by oily water D. by mixed water 27. Which is the pollution prevention equipment? A. booster pump B. evaporator C. incinerator D. cooler 28. The oil sludge is burnt in the _onboard. Ill show you the ashes. A. boiler B. main engine C. auxiliary engine D. incinerator 29. Most marine biological sewage treatment plants consist of all the following statements except _.A. aeration tanks B. settling tanks C. disinfection agent D. anaerobic bacteria (厌氧菌)30. Great care is dedicated to the removal of _ from the scavenge air. A. gravity B. viscosity C. density D. humidity 31. Dirty oil must be _ before being used again. A. mixed with clean oil B. purified C. heated D. strained32. When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and _ the sea water passing through the tubes. A. dispose B. dissolve C. heat D. dissipates33. When securing a flash-type evaporator for an extended period of time, you should _. A. fill the unit with saltwater B. fill the unit with descaling compound C. completely drain the unit D. tightly seal the unit to exclude air 34. Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled? A. hydraulic pumps B. valves C. hydraulic cylinders D. hydraulic motors 35. Positive displacement, helical gear(斜齿轮) pumps are well suited for pumping oil because _. A. stuffing boxes eliminate the leakage problems usually associated with other gear pumps B. it is not necessary to closely maintain design clearances with this pump C. they are essentially self-priming and produce a high suction lift D. these pumps are designed with extreme tooth angles 36. The oil in a cargo winch gear box should be sampled periodically(周期性地) to _. A. prevent the gear box from leaking B. prevent the oil from becoming inflammable(易燃的) C. make sure it has not become contaminated(污染) D. make sure the motor bearings are lubricated 37. If an anchor windlass has been idle for some time, you should _. A. repack all valve stems B. lubricate it prior to use C. replace the foundation bolts D. balance the warping heads 38. A mooring winch should be equipped with mechanical brakes capable of holding _. A. half the breaking strength of the mooring line B. the full breaking strength of the mooring line C. the maximum expected tension(张力) of the mooring line D. 50% over the working tension of the mooring line 39. Hydraulic cranes must be properly warmed-up before being operated because _. A. warm-up allows the hydraulic system to become charged with oil B. warm-up allows the relief valves to be properly tested C. hydraulic strainers operate only during the warm-up period D. hydraulic fluid must be at the proper viscosity 40. The current flowing first in one direction and then in another is called _current. A. a rush B. an alternating C. a direct D. an exciting 41. The frequency of an alternator at a given RPM 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 voltage 42. While paralleling two AC generators using synchronizing(同步的) lamps only, both lamps will go dark when the generators are _. A. running at the same speed B. grounded C. of the same polarity(极性) D. in phase 43. The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor _. A. load limit settings B. idle speed settings C. speed limit settings D. speed droop settings 44. Electric insulation is made of organic substances and so gradually _with age. A. deteriorates B. increases C. are fouled D. becomes better 45. The main generators are connected to _. A. distribution boards B. section boards C. emergency switch boards D. main switch boards 46. The operation of _ two alternators requires the voltages to be equal and also in phase. A. control B. series-mountingC. running D. paralleling 47. _is a machine by which electrical energy is transformed into mechanical energy. A. An alternator B. An electric motorC. A diesel engine D. A main switchboard48. A ground in an electrical circuit outside the engine room _. A. cannot be detected under normal conditions B. is of no consequence to engineering personnel C. is indicated at the branch circuit breaker panel D. is indicated by the ground detecting lamps on the main switchboard 49. Time delayed or delayed action-type fuses are designed to _. A. prevent grounds in branch circuits B. prevent opens in motor circuits C. permit momentary overloads without melting D. guard lighting and electronic circuits 50. When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is _. A. lagging B. leading C. maximum D. minimum 51. When there is a fire in a large electric motor, normally the very FIRST step is to _. A. secure the electric supply B. ventilate area to remove smoke C. start the fire pump and lead out hose D. apply foam 52. Before “stand by” is rung on the engine telegraph, it is usual to give the main diesel engine a brief trial _ahead and astern. A. with power B. on power C. with air D. on air 53. Bridge orders must be _and a record of any required changes in speed and direction should be kept. A. slowly carried away B. carried out with a period of delay C. promptly carried out D. paid by the captain 54. After the order _ is given, the air system is shut down, the turning gear put in. A. Finished With Engine B. Stop The Engine C. Stand-by Engine D. Slow-down Engine 55. A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate? A. The tank is safe to enter. B. The tank is especially dangerous to enter. C. Carbon monoxide(一氧化碳) is present. D. Water vapor present when the tank was sealed has oxidized(使氧化). 56. Fires involving combustible metals are classified as _. A. class A fires B. class B fires C. class C fires D. class D fires 57. The three basic components of a fire are chain reaction, heat, fuel, and _. A. carbon monoxide B. oxygen C. carbon dioxide D. any gaseous substance 58. CO2 extinguishes a fire by _. A. a blanket of bubbles formed on the surface of the fire B. smotheringC. isolating the heat from the fuel D. cooling59. Seawater may be used for drinking water _. A. at a maximum rate of two ounces(盎司) per day B. after mixing with an equal quantity of fresh water C. if gather during or immediately after a hard rain D. under no circumstance 60. Obviously, for a given fuel oil, its pour point is _its cloud point. A. lower than B. higher than C. as same as D. better than 61. Now that the valve is not worth _, I suggest it _. A. to repair/renewing B. repairing/renewing C. to repair/ be renewed D. repairing/be renewed 62. When a vessel is in dry-dock, the vessels engineers should _.A. examine the condition of the propellerB. chip and paint all hull protection zincsC. install new docking plugs in all cofferdamsD. inspect the hull for hogging or sagging 63. The additional mark _in the Classification Certificate for Machinery represents the propulsion apparatus is remotely controlled on the navigating bridge control station, and engine room is watched by duty personnel. A. BRC B. MCC C. AUT-0 D. AUT-1 64. Oil Record Book Part I shall be provided to _. A. every oil tanker B. every ship of 400 tons gross tonnage and above C. every ship D. any ship 65. “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 Convention B. the MARPOL Convention C. the STCW Convention D. the LOAD LINE Convention 66. 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 Book C. Oil Record Book D. Muster List 67. When deciding the composition of the engineering watch, which may include _appropriately, many factors shall be taken into account. A. satisfied engineers B. qualified ratingsC. satisfied chief engineer D. qualified chief engineer 68. During an engine room watch if immediate action is necessary to ensure safety of the ship, its machinery and crew, _. A. the chief engineer must be informed at first B. the captain must be informed at first C. it must be taken by the duty engineer D. the generator engine must be stopped 69. One of the methods NOT usually allowed in cleaning up oil spills in the United States is _. A. skimmers B. straw C. dispersants D. sawdust70. According to the international regulations concerning the prevention of pollution of sea areas from ships, the disposal into the sea of all plastics is _. A. welcome B. admitted in some special sea areas C. prohibited D. acceptable 71. In cleaning up an oil spill, the use of chemical agents would _. A. absorb the oil for easy removal B. remove the oil from the water C. disperse(分散) or dissolve the oil in the water D. not affect the oil 72. The main objective of the SOLAS Convention is to specify _for the construction, equipment and operation of ships, compatible their safety. A. at most references B. at least references C. maximum standards D. minimum standards 73. These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be _ . A. optimized B. emulsified C. contaminated D. oxidated74. The ship security officer shall have knowledge and have received training, taking into account the guidance given in Part B of_. A. the ISM Code B. the ISPS Code C. the IBC Code D. the IGC Code 二、关联题（关联题题干下有4个小题，每小题4个选项）The clearly visible benefit of RT-flex engines is their smokeless operation at all ship speeds. This is achieved by the superior combustion performance with the common-rail fuel injection.This system maintains the fuel injection pressure at the optimum level right across the engine speed range, ensuring optimum combustion under all operating conditions. In addition, a selective shut-off of single injectors at very low spee