轮机英语大证考试模拟题(四)

轮机英语大证考试模拟题(四) 轮机英语大证模拟试题(四) 1. During the valve overlap period, "the exhaust pressure of a turbocharged, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______. A. cooler operation of the exhaust system B. constant pressure from the turbochargers C. effective cylinder scavenging and cooling D. effective constant pressure for turbocharger operation 2. The 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. AUT-1 B.AUT-0 C.BRC D. MCC 3. Before replacing a piston you should check the rings to see that all clearances and gaps are within permissible______. A. discrepancy B. error C. deflection D. tolerance 4. ISM code has applied to the ships as follows except______. A. High-speed craft of 500 gross tons or more B. Passenger ships C. Bulk freight vessels of 500 gross tons or more D. Warship of 500 gross tons or more 5. In a two-stage flash-type evaporator, excess brine in the first stage automatically passes ______. A. directly to the second stage feed heater B. directly overboard through the brine cooler C. into the second stage flash chamber D. into the second stage vapor condenser 6. Motors and generators, both d. c. and a. c., are rated as CMR machines. CMR stands for______. A. Continuous Maximum Rated B. Centralized Monitoring Room C. Continuous Monitoring Room D. Centralized Maximum Rated 7. When centrifuging heavy fuel oil, an important factor to consider is (are) the ______.?flow rate ?viscosity of the fuel oil A. ? B. Neither ? nor ? are correct C. ? D. ?? 8. New adopted regulation of SOLAS says the master shall_____ when maintaining the security of the ship. A. Exercise his professional judgment B. exercise his professional judgment but be constrained by the company C. take actions by the ship owner' s order D. take actions by the company' s order 9. An operational amplifier, as used in today's consoles, has a calculated gain of 5. This means that when the input changes_____. A. 10 volts, the output changes 2 volts B. 2 volts, the output changes 10 volts C. 10 volts, the output changes 5 volts D. 5 volts, the output changes 10 volts 【关联题】 SOLAS, Chapter IX, and the ISM Code applies to ships, regardless of the date of construction, as follows: Passenger ships, including passenger high-speed craft, not later than 1 July 1998; Oil tankers, chemical tankers, gas carriers, bulk carriers and cargo high-speed craft of 500 gross tons or more, not later than 1 July 1998; Other cargo ships and mobile offshore drilling units (MODUs) of 500 gross tons or more, not later than 1 July 2002. The Code’s origins can be traced back to the late 1980s, when concern was growing about poor management standards in the shipping industry. In 1989, IMO adopted Guidelines on management for the safe operation of ships and for pollution prevention "to provide those responsible for the operation of ships with a framework for the proper development, implementation and assessment of safety and pollution prevention management in accordance with good practice.” These guidelines were revised in November 1991 and the ISM Code itself was adopted as a recommendation in 1993. However, after several years of practical experience, it was felt that the Code was so important that it should be mandatory. It was decided that the best way of achieving this would be through the International Convention for the Safety of Life at Sea, 1974 (SOLAS). This was done by means of amendments adopted on 24 May 1994, which added a new Chapter IX to the Convention entitled Management for the safe operation of ships. The Code itself is not actually included in the Convention, but is made mandatory by means of a reference in Chapter IX. 10. (4) Which of the following is TRUE? A. A new Chapter IX to the SOLAS Convention is entitled "International Safety Management". B. The ISM Code itself is actually included in the SOLAS Convention. C. The ISM Code is made mandatory by a reference in Chapter 9 of the SOLAS Convention. D. This passage is mainly on the contents of the ISM Code. 11. (3) According to the passage, a LNG carrier built in 1996 should comply the ISM Code_____. A. not later than 1 July 2004 B. not later than 1 July 1996 C. not later than 1 July 1998 D. not later than 1 July 2002 12. (2)The ISM Code became to be mandatory______. A. in 1974 B. in 1993 C. through the SOLAS D. in 1991 1 13. (l)The ISM Code’s origins can be traced back to______. A. the year of 1980 B. the year of 1989 C. the year of 2002 D. the year of 1998 14. If ignited, which of the listed materials would be a class ‘B’ fire? A. Wood B. Paper C. Magnesium D. Diesel Oil 15. All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during______for new piston rings. A. the boiler firing B. gas exchange process C. the running-in period D. the running process 16. During UMS rounds, a duty engineer notices that the fuel oil overflow observation glass is full of oil. Should he ______. A. start the F. O. purifier B. Make a sounding of the F. O. overflow tank and decide if there is enough capacity to leave it until the following morning. C. Stop all F. O. transfers immediately, and inform the chief engineer. D. Call a motorman and have him sound the F. O. overflow tank periodically during the night. 17. Which component does not belong to an incinerator? A. auxiliary burner B. superheater C. waste oil burner D. dump chute 18. The specific gravity of fuel oil is______. A. absolute value B. set value C. constant value D. relative value 19. The MARPOL Convention is the main international convention_____. A. about marine pollution prevention B. about marine C. covering marine protection of life D. about ship and port security 20. In the event of minor emergencies when the machinery spaces unattended, ______ will be informed of malfunctions in the machinery by his cabin monitor. A. the bridge officer on watch B. the chief engineer C. the engineer on cabin watch D. the master 21. Scale formation in a flash-type evaporator is usually found on the_____. A. tubes of the air ejector condenser B. flash chamber walls C. tubes of the salt water feed heater D. tubes of the distiller condenser 22. Which one is not the ' clear grounds ' for a more detailed inspection? A. serious corrosion on the hull B. damaged sanitary pump C. one page missing in the oil record book D. the master and the chief engineer are unable to communicate effectively 23. In______ boiler the water flows through the inside of the tubes while the hot gases pass around the outside. A. an exhaust gas B. a fire-tube C. a water-tube D. any kind of 24. In the diesel engine, bearing replacement requires lifting the ______ which is held from above with studs and nuts. A. bush B. web C. journal D. bearing cap 25. The emergency generator or emergency battery is connected to______ on most large ships. A. main switch boards B. emergency switch boards C. section boards D. distribution boards 26. Which can make circuit and realize off circuit under normal condition? A. voltmeters B. synchroscope C. distribution box D. over speed governor 27. To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the______. A. motor and pump shaft B. casing and impeller wearing rings C. lantern ring and impeller D. shaft and impeller 28. The alarm signal for engine room catching fire is a blast of random bell followed by______. A. three knocks B. five knocks C. four knocks D. two knocks 29. In order to increase the wearing resistance, the cylinder liner surfaces are sometimes______. A. bronze-plated B. chromium-plated C. zinc-plated D. aluminum-plated 30. If a centrifugal pump operating with a positive suction head becomes air bound, your first response should be to______. A. vent the casing B. re-prime the pump C. tighten the packing D. close the discharge 31. In a modern three-phase A. C. synchronous brushes generator, the excitation winding is on the rotor. That means______. A. The winding on the rotor is for inputting excitation current. B. There are three phase windings on the rotor. C. The generator has no brushes. D. The generator needs not excitation. 32. The International Sewage Pollution Prevention Certificate shall be issued for a period specified by the Administration, which shall not exceed ______ from the date of issue. A. five years B. one year C. three years D. six months 2 33. An orifice-check valve placed in a hydraulic system is used to______. A. allow free movement of hydraulic fluid in both directions B. restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction C. allow a restricted fluid flow in one direction only D. regulate the fluid flow in either direction 34. Scale formation on the waterside of boiler tubes, is generally produced by______ A. dissolved oxygen in the waterside B. metal oxides in the waterside C. the salts of calcium and magnesium D. accumulations of phosphates in the feedwater If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, the______. 35. A. oil solids will be deposited only at the intermediate top disk B. oil will be lost through the water discharge ports C. oil has a tendency to emulsify in the bowl D. purifier will act as a clarifier at the discharge ring 36. Hydraulic pumps most commonly used in steering systems are of the______. A. volute type B. axial piston type C. screw type D. lobe type 37. However, once the temperature rises to the point where decomposition of the steam into oxygen and hydrogen could occur, 649?, the use of _____ would then intensify the fire and a serious explosion could result. A. CO extinguisher B. soot blowers C. dry chemical D. foam extinguisher 2 38. Noxious emissions amount to 0.25~0.4 percent by volume of the ______, depending on the amount of sulphur in the fuel and its lower heat value, and the engine type, speed and efficiency. A. sulphur B. suction air C. exhaust gas D. discharging air 39. The quantity of cooled air delivered by an air conditioning unit should ______ the sum of the quantity of air recirculated to the unit and the quantity mechanically exhausted. A. balance B. equal C. be above and beyond D. be less than 40. To incinerate solid waste, ______ and then charge it through the solid waste dump chute. A. start the auxiliary and waste oil burners B. stop the auxiliary and waste oil burners C. start the auxiliary burner and stop the waste oil burner D. stop the auxiliary burner and start the waste oil burner 41. ______on a ship transmits power from the engine to the propeller. A. The compression air system B. The speed regularly system C. The transmission system D. The automatic control system 42. An inadequate reciprocating bilge pump discharge is most often caused by______. A. clogged suction strainers B. clogged drain valves C. defective safety valves D. scarred cylinder walls 43. The term used to express the ignition quality of a particular fuel is______. A. volatility point B. ignition index number C. cetane number D. octane number 44. After making the required notification that a large oil spill into the water has occurred, the FIRST action should be to______. A. throw grains of sand into the oil B. apply straw or sawdust on the oil C. have the vessel move out of the spill area D. contain the spread of the oil 45. ______allows for expansion and water make up in the water cooling system. A. A settling tank B. A head valve C. A head tank D. A drain tank 46. In a diesel engine, when the fuel is injected into the cylinder, ______. A. the piston has just past the TDC B. the piston has moved about one-fifth of the way up C. the piston has almost reached the TDC D. the piston is just coming upward from the bottom dead center 47. The ratio of the brake horsepower to the indicated horsepower of a diesel engine is its______. A. thermal efficiency B. volumetric efficiency C. mechanical efficiency D. brake thermal efficiency 48. The temperature of a refrigerant gas is the highest______. A. in the expansion valve B. in the receiver C. at the compressor suction D. at the compressor discharge 49. The level of the ratings which consist of the engine room watch is______. A. Operation 1evel. B. support level C. Officer level D. service level 50. When administering artificial respiration, it is of the utmost importance to_____. A. use the mouth-to-mouth method B. use rhythmic pressure method C. check the injured person s heartbeat D. clear airways 51. Which distribution system has largely been used on the board? A. a. c. system B. earthed neutral C. insulated earth D. the fuse 52. When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the______. A. dock B. pedestal C. cargo hold D. machinery space 3 53. Temperatures in the cylinder are naturally high, though only______are (is) subjected to actual flame temperatures. A. the cylinder combustion space B. the cylinder combustion space and piston crown C. the cylinder head and piston D. the piston crown 54. CO2 extinguishes a fire by _____. A. isolating the heat from the fuel B. a blanket of bubbles formed on the surface of the fire C. smothering D. cooling 55. In a four-stroke/cycle diesel engine, the camshaft rotates at______. A. the same speed as the crankshaft B. twice the crankshaft speed C. half the crankshaft speed D. a speed independent of the crankshaft 56. The upper piston rings in large, slow-speed, two-stroke/ cycle diesel engines are roost effectively lubricated by oil______. A. supplied from wick fed drip lubricators B. thrown off from the main bearings C. flow from a centrifugal or banjo oiler D. fed from mechanical lubricators 57. In automatic______, the winch may be overhauled and wire is paid off the barrel at a pre-determined maximum tension. A. mooring winches B. capstans C. cranes D. windlass 58. Prior to any overhaul work on electric equipment, it is important to ensure the circuits are______ A. excited B. on line C. dead D. live 59. _____device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed. A. An automatic B. An interlocking C. A transmission D. A self-regulating 60. When is the dock survey carried out? A. After 5 years from last annual survey B. Usually during dock repair C. Before sea trial D. During annual repair 61. If a crankcase explosion occurs in a diesel engine, you should stop the engine and______. A. allow the engine to cool naturally B. immediately open all crankcase relief ports C. increase crank case scavenge air to remove unburned gases D. increase crankcase exhauster speed to draw cool air into the engine 62. ' Insufficiency of manning or insufficiency of certification of seafarers' is an identification of a/an______. A. substandard ship B. standard ship C. over-standard ship D. reference ship 63. With a purely resistance load the voltage and current are in phase, giving a power factor of ______. A. less than one B. one C. negative one D. more than one 64. The device used for preventing the passage of flames into enclosed spaces is called _____. A. safety valve B. flame relief valve C. flame arrester D. flame stopper 65. Sludge may form in the crankcase of an air conditioning compressor as a result of ______. A. reducing the cloud or floe point B. bubbling refrigerant C. lowered operating temperatures D. overheating and oxidation 66. The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the_____. A. valve op erathing mechanism B. method of supplying air C. method of igniting fuel D. cooling system 67. If two A. C. generators are operated in parallel, the load is distributed evenly by______. A. changing field excitation B. a rheostat C. adjusting the governor settings D. a balancing coil 68. Before stopping the oil purifier, you should______. A. cut off the power B. close oil outlet valve C. open guide water valve D. shut off the oil inlet firstly. 69. Before stopping the oil purifier, you should______. A. cut off the power B. close oil outlet valve C. open guide water valve D. shut off the oil inlet firstly. 70. Which of the following machinery space operations is required to be logged in the Oil Record Book? A. Shifting suction of main fuel pump to reserve fuel oil tank. B. Ballasting or cleaning of fuel oil tanks. C. Daily inspection of engine room bilges. D. Changing out sprayer plates to adjust for steam demand. 71. A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an______. A. stator B. armature C. exciter D. Rotor 72. When received the order "Finished With Engine", which of the following operations is wrong? A. stop the L. 0 pump, S. W pump, jacket water cooling pump immediately B. engage the turning gear, turn the main engine C. open the main engine scavenge air trunk's drain cocks D. stop the F. 0 booster pump 73. Before the oily water separator put into operation, it should be______. A. filled with bilge water B. filled with oil C. emptied D. filled with clean water 74. Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler? 4 A. Frequent compounding B. Chemical cleaning C. Bottom blowing D. Hydrazine treatment of condensate 75. The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can be immediately be placed in the manual mode of operation when notified that the ship is ______. A. in congested waters B. in an open road-stead C. at unsheltered anchorage D. at anchor 76. Which of the listed characteristics of lube oil are the most important to the engineer from an operational standpoint ? A. Viscosity, acidity, and demulsibility B. Autoignition point, viscosity index, and film strength C. Ash content, carbon residue, and gravity D. Pour point, flash point, and precipitation number The part of the anchor windlass that engages the anchor chain for lifting is called the______. 77. A. capstan B. fair lead C. warping head D. wildcat 78. To increase the frequency of an operating AC generator, you should______. A. decrease the field excitation B. increase the speed of the prime mover C. increase the number of magnetic poles D. increase the field excitation 79. In____engines, exhaust also takes place through a row of ports in the cylinder, these being arranged just above the air ports. A. naturally aspirated B. loop-scavenged C. turbo charged D. uniflow scavenged 80. The dew point is reached when the wet bulb temperature______. A. 50C above the dry bulb temperature B. less than the dry bulb temperature C. equal to the dry bulb temperature D. twice the dry bulb temperature 81. A marine diesel engine is started by______. A. supplying high pressure oil into a hydraulic motor B. electrical igniting C. supplying high temperature air into the cylinder D. supplying high pressure air into the cylinder 82. The activated sludge strength should be checked at regular intervals, and it is good that the color of the aeration compartment water is______. A. chocolate B. yellow C. blackish D. ivory-white 83. A generator is prevented from becoming motorized by the use of a/an______. A. over-speed trip B. governor controls C. reverse power relay D. back pressure trip 84. Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid______ pressure. A. in relative to B. depending on C. because of D. regardless of 85. Which of the following is least likely to cause the ignition of fuel vapors? A. An open running electric motor B. Static electricity C. Explosion proof lights D. Loose wiring 86. The lifting pressure of ______is set in the presence of a surveyor, it is locked and cannot be changed. A. safety valves of marine boiler B. injector pump of main engine C. safety valves of a reciprocating pump D. fuel valves of main engine 87. Be sure to make the engine turn by ______ before starting and after stopping. A. steering wheel B. steering gear C. turning gear D. turning cycle 88. If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperature, then the air should be purged, and the ______. A. compensating needle valve should be opened fully B. speed limiting device should be adjusted C. compensating needle valve should be adjusted to stabilize operation D. rack position should be adjusted 89. A defective boiler atomizer couldn’t lead to______. A. a bad combustion performance B. low temperature in furnace C. black smoke D. high steam pressure 90. Before the seas get rough, it is a good safety practice to______. A. increase lighting B. move quickly about the ship C. secure loose gear D. shutdown auxiliary equipment 91. Check valve isn’t used to control______. A. direction of oil flow B. high pressure overflow C. bypass of filter D. back pressure of return oil 92. Oil water separators are used to ensure that ships don t discharge oil when pumping out______. A. bal1ast water B. bilge water C. sewage water D. boiler water 【关联题】 The Wartsila 50DF applies the sophisticated dual-fuel technology incorporated in the reliable and well-tried Wartsila 46 HFO engine. The Wartsila 50DF is designed to provide high output with fuel flexibility, low emission rates, high efficiency and high reliability. The engine functions are controlled by an advanced automation system that allows optimum running conditions to be set independent of the ambient conditions or fuel. Both the gas admission and pilot fuel injection are electronically controlled. 5 This ensures that the correct air-fuel ratio can be set for each cylinder individually and that the minimum amount of pilot fuel can be injected while ensuring safe and stable combustion. All parameters are controlled automatically during operation. The Wartsila 50DF is designed to meet customer demands for a safe and fuel-flexible engine, running both on gas and on liquid fuel. The 50DF, like all Wartsila engines, has a simple and straightforward design. Its piping and external connections have been minimized, the safety margins are ample, maintenance is easy and rapid, and the electronic safety protection system is a built-in feature. The individually and electronically controlled valves ensure that all cylinders say within the operating window, avoiding knocking and misfiring. This eliminates unnecessary load reductions and shutdowns. The Wartsila 50DF is designed to give the same output whether it is running on natural gas or on LFO/HFO. For the Wartsila 50DF operating on gas, NOx and CO emissions are substantially lower than for an HFO engine. The engine is 23optimized for emissions of 500mg / m at 5%O, dry and fulfils the German TA-luft standard for operation on natural gas. This 2 corresponds to 2 g/KWh of NO. Back-up fuel: 970 ppm vol @15%O, dry, for World Bank NOx or below 12.91 g/kWh x2 following the marine requirements. 93. (4) Which of the following can NOT be used on the Wartsila 50DF? A. LNG B.F.O. C. D.O. D. Coal gas 94. (3)The gas admission and pilot fuel injection of the Wartsila 50DF are controlled by_____. A. Electronically and individually controlled servomotor B. Electronically and independently controlled valves C. Electrically and integradually controlled valves D. Electrically and individually controlled servomotor 95. (2) Which of the following is NOT the main functions of an advanced automation system for the Wartsila 50DF? A. Ensure that the minimum amount of pilot fuel can be injected B. Allow optimum running conditions to be set dependent of fuel C. Allow optimum running conditions to be set regardless of the ambient conditions D. Ensure that the correct air-fuel ratio can be set 96. (l)For the Wartsila 46, what is the content of NO emissions at 5%O? X23 3 A. 500rog /NmB. Beyond 500ing/NmC. 2 g/KWh D. Below 2 g/KWh 把 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 写在相应的题号后:(第四套) 姓名 1-5: 6-10: 11-15: 16-20: 21-25: 26-30: 31-35: 36-40: 41-45: 46-50: 51-55: 56-60: 61-65: 66-70: 71-75: 76-80: 81-85: 86-90: 91-96: 6