第46期轮机英语试题
一、单项选择题
1. In order to control thermal stresses ,some type of modern engines use piston with______.
A. heavy wall and intensive cooling
B. heavy wall and no cooling
C. thin wall and no cooling
D. thin wall and intensive cooling
2. The average pressure exerted on a piston during each power stroke is termed______.
A. indicated horsepower
B. mean effective pressure
C. exhaust back pressure
D. compression pressure
3. The ignition quality of a diesel fuel is indicated by the ______.
A. cetane number
B. volatility point
C. viscosity index
D. octane number
4. A piston in a four-stroke/cycle diesel engine makes four strokes during each ______.
A. crankshaft revolution
B. mechanical cycle of operation
C. period of two combustion cycles
D. cycle of two events
5. Crankshafts of medium speed engines are ______ from a single piece of steel.
A. unusually solid welded
B. never be solid forged
C. almost invariably solid forged
D. almost invariably be welded
6. The starting 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
7. 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
8. Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of ______.
A. less even torque
B. higher cylinder head temperatures
C. fewer power strokes per revolution
D. greater weight/size requirements
9.______ controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion.
A. The viscosity regulator
B. The temperature controller
C. The flow meter
D. greater weight/size requirements
10. 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 walls
11. A large, low-speed, main propulsion diesel engine uses sea water to directly cool the ______.
A. cylinder heads
B. exhaust valves
C. scavenging air
D. injectors
12. In a turbocharger, inlet air velocity is increased in the ______.
A. inlet nozzle ring
B. stationary diffuser passages
C. compressor outlet volute
D. rotating impeller vanes
13. 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
14. In a simple mechanical governor, the ______.
A. centrifugal force rotates the ball-head
B. flyweight centrifugal force is balanced by spring force
C. flyweight centrifugal force is balanced by hydraulic pressure
D. speeder spring alone actuates the fuel control rod
15. A pyrometer is an instrument commonly used to measure ______.
A. cylinder pressure
B. flame intensity
C. exhaust gas temperature
D. crankshaft axial alignment
16. After starting a diesel engine, which of the listed operating conditions should be checked first?
A. Air box pressure
B. Lube oil pressure
C. Exhaust temperatures
D. Raw water pressure
17. 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 relief valve
C. a fusible plug
D. a bursting cap
18. What preventative maintenance should be done frequently to diesel engines starting air receivers?
A. Drain the accumulated moisture
B. Test the relief valves
C. Watch the temperature to prevent fluctuation in pressure
D. Clean the interior to remove oil and foreign matter
19. In reducing engine speed to an efficient propeller speed by the use of reduction gears, ______.
A. speed and torque are both reduced
B. speed is reduced and torque remains uncharged
C. speed is reduced and torque is increased
D. speed is sometimes unchanged while torque is increased
20. Which of the following statements concerning fire-tube boilers is correct?
A. Combustion gases flow through the tubes
B. Flames impinge on the tubes
C. Combustion occurs in the tubes
D. Water flows through the tubes
21. The exhaust boilers are used to recover some of ______ carried in the exhaust gas from the main engine.
A. water
B. oil
C. heat
D. steam
22. The water level in a steaming auxiliary boiler will always ______.
A. rise when the steam pressure is increased
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
23. When lighting off 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
24. If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.
A. high steam pressure in the boiler
B. abnormally high feed-water temperature
C. abnormally high boiler water temperature
D. steam demand exceeding feed pump capacity
25. Through a ______ pump, the liquid is transferred from the suction to the discharge by the
mechanical variation of the volume of a chamber or chambers.
A. positive displacement
B. ejector
C. centrifugal
D. air compressor
26. 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 present
B. to cool the shaft
C. in place of mechanical seals
D. in place of lantern rings
27. Which of the valves listed will be cycled from fully open to fully close when the handle is turned 90 degree?
A. A rising steam gate valve
B. A globe stop valve
C. A check valve
D. A butterfly valve
28. Centrifugal pumps, used to handle hot liquids, must have a minimum flow through them under all operating conditions. This flow serves to ______.
A. prevent overheating and damage to pump rotating parts due to rubbing
B. maintain the net positive suction head of the pump
C. maintain hydraulic differential in the pump impeller passages
D. purge the pump of non-condensable vapors and gases
29. If you heard a …crankling ? noise in a centrifugal pump, the most probable cause of the problem would be ______.
A. insufficient speed
B. cavitation
C. excess discharge pressure
D. excessive net positive suction head
30. In the process of ______, liquid changes into gas.
A. evaporation
B. frosting
C. condensing
D. compressing
31. 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 switch
32. A purge recovery system is used in central air conditioning or refrigeration system to ______.
A. purge lube oil from the liquid refrigerant
B. recover water purged from the system
C. separate foul gases from the receiver
D. purge non-condensable gases without losing refrigerant
33. 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 belts
C. high line voltage
D. air in the system
34. When discharging bilge water over board, which criteria must be observed?
A. The requirement for the oil content of bilge water discharged is under 15 ppm
B. No discharge in sensitive waters
C. Any discharge in sensitive waters
D. International, national or local requirements have to be observed
35. The following measures can be used to improve oily water separator?s separating effect except ______.
A. overhauling every two year
B. working at intervals
C. renewing filtration material
D. properly heating
36. Disposal of all kinds of garbage but ______ listed as below is prohibited whining Special Areas.
A. comminuted or ground papers, rags, glass, metal etc
B. plastics
C. food waste comminuted or ground
D. Incinerator ash
37. When does auxiliary burner of incinerator put into operation?Ⅰ、start incinerator when it is cold Ⅱ、little waste oil for dealing withⅢ、plenty of waste oil for dealing withⅣ、the water and impurity in sludge are too muchⅤ、the temperature in incinerator is lowⅥ、dealing with little solid rubbish
A. Ⅱ+Ⅲ+Ⅴ
B. Ⅰ+ Ⅱ+Ⅲ+Ⅳ
C. Ⅰ+Ⅳ+Ⅴ+Ⅵ
D. Ⅰ+ Ⅱ+Ⅲ+ Ⅵ
38. Bacteria which live ______ are said to be aerobic.
A. in the presence of oxygen
B. without oxygen
C. in the presence of nutrition
D. without nutrition
39. When centrifuging heavy fuel oil , an important factor to consider is (are) the ______.①flow rate②viscosity of the fuel oil
A. ①
B. ②
C. ①②
D. Neither ① nor ② are correct
40. To ensure lube oil purifier working in normal condition, the interval between two sludge discharging should not exceed ______ hours.
A. 2
B. 4
C. 5
D. 6
41. ______ can not cause oil flow from water outlet of self cleaning purifier.
A. Oil temperature too high
B. Diameter of gravity disc too large
C. Oil temperature too low
D. High level tank out of water
42. In the production of freshwater from seawater through a process of heating and cooling, the cooling phase of production is usually called ______.
A. evaporation
B. distillation
C. dehydration
D. condensation
43. Distilled water from an evaporator may be discharged into a potable water tank ______.
A. through a detachable hose connection
B. after passing through an activated charcoal filter
C. after chemical analysis shows it is fit for consumption
D. through a solenoid operated three-way valve
44. What type of valve is used to direct the flow of hydraulic fluid?
A. relief valve
B. direction control valve
C. stop valve
D. pressure control valve
45. Cargo handling unit is rated according to the ______ to be lifted.
A. cargo crane
B. jib
C. safe working load
D. oil pressure
46. The crane is usually mounted on a pedestal to offer adequate ______to the operator.
A. time
B. space
C. length
D. visibility
47. Proper internal lubrication of a hydraulic anchor windlass left idle for extended periods can be accomplished by ______.
A. performing a check run on the unit at regular intervals
B. testing the hydraulic fluid for proper PH
C. checking the reservoir for proper level
D. cleaning strainers at regular intervals
48. ______ 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
D. Cargo hatches
49. The major source of chemical contaminants in hydraulic fluid is ______.
A. microscopic steel shavings
B. abrasive waste
C. anti-oxidant compounds
D. oxidation by-products
50. If you install a new hydraulic hose in a hydraulic system , the hose must be long enough to allow for contraction to prevent______.
A. failure of the hydraulic hose
B. excessive flow through the line
C. friction in other areas of the hydraulic system
D. overheating of the hydraulic fluid
51. 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. closed circuit
52. 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. output voltage
53. The operation of paralleling two alternators requires the voltages to be _____and also in phase.
A. zero
B. eliminated
C. different
D. equal
54. The frequency of an AC generator is controlled by the ______.
A. rheostat
B. governor
C. exciter
D. capacitor
55. A motor enclosure which protects against falling liquids is classified as ______.
A. water-proof
B. drip-proof
C. spray-tight
D. spray-proof
56. ______ are supplied with electricity by main switchboard directly.
A. Suez Canal searchlight, air compressor and air conditioning compressor.
B. Air compressor, boiler blower and refrigeration plant
C. Boiler blower, Suez Canal searchlight and refrigeration plant
D. Suez Canal searchlight and boiler blower
57. ______ is not installed on the emergency switchboard.
A. Ammeter
B. V oltmeter
C. Wattmeter
D. Synchroscope
58. 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
59. Moisture in a D.C. motor would cause ______.
A. short circuit
B. speed up
C. slow down
D.hunting
60. The part of a fuse that melts and opens the circuit is made of ______.
A. copper and antimony
B. steel and babbitt
C. aluminum or beryllium alloy
D. zinc or an alloy of tin and lead
61. The main purpose of an electric 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 starting
62. Sparking at the brushes of a running motor could be an indication of ______.
A. normal operation
B. a dirty commutator
C. increased brush capacity
D. water vapor absorption
63. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open , is to ______.
A. test the starting system
B. remove condensation from the cylinders
C. check the compression
D. check for proper lube oil pressure
64. During the watch keeping at sea, _______ should be logged or recorded in the engine log book.
A. the running hours of the cooling water pump
B. chief engineer’s order
C. the main parameters of main and auxiliary equipments
D. the position of the vessel
65. During ship maneuvering, when the diesel is stopped, which of the following items is wrong?
A. keep all systems running normally
B. main engines is available bottle outlet valve
C. shut off the starting air bottle outlet valve
D. pay attention to the changes of the system parameters
66. Which of the listed conditions can be considered as the single greatest cause of accidents?
A. Speed
B. Excessive knowledge or skill
C. Human error
D. Excitement
67. On a tank vessel, which of the following substances would be burning in a class ‘B’fire?
A. Oil
B. Wood
C. Rags
D. Electrical wiring
68. 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 bin
69. Which of the fire extinguishers listed is to be weighed annually and sent ashore for recharging is the weight loss exceeds 10% of the weight of a full charge?
A. Foam
B. Soda acid
C. Dry chemical
D. Carbon dioxide
70. 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 proceed 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
71. If there were a fire in the bunker tanks, you should _________.
A. close the vent
B. pump out the tank
C. activate the fixed CO2 system
D. cut off the heating coils
72. To avoid excessive surge pressure when bunkering , you should______.
A. bunker at a normal rate
B. check for kind in hose
C. close at a normal rate
D. shut valves before topping off
73. ______, where minor repairs are carried out with a ship 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. Conversion
74. 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 annual survey
75. In the initial survey, ______ compiles the survey report and fills in certificate.
A. surveyor
B. chief engineer
C. Before sea trial
D. After 5 years from last annual survey
76. If an incorrect entry were made in the Oil Record Book, you should _______-.
A. erase the entry and rewrite it
B. notify the ship?s officer-in-charge
C. completely black it out and make the correct entry alongside
D. draw a single line through the wrong entry and initial it
77. The International Oil Pollution Prevention Certificate is valid for a period of ______.
A. one year from the date of issue
B. f ive years from the date of issue
C. three years from the date of issue
D. four years from the date of issue
78. 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 effectively
D. absence of an up-date muster list
79. 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
80 .STCW 78/95 Convention shall apply to seafarers ______ on board seagoing ships entitled to fly the flag of a Party.
A. served
B. serving
C. surveyed
D. surveying
81. The main purpose of port State control is not to ______.
A .prevent an unsafe ship proceeding to sea
B. prevent a ship threatening the marine environment
C. fine the ships
D. confirm a safe sailing
82. 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 minutes
83. When the chief engineer is in the machinery spaces, the officer in charge of the engineering watch shall ______.
A. continue to be responsible for machinery space operations despite the presence of the C/E
B. hand over the responsibility to the chief engineer actively
C. be responsible for the watching together with the chief engineer
D. assistant the chief engineer to control the machinery
84. 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
85. The ship emergency plan item does not include ______usually.Ⅰ.lifesaving, fire fighting
Ⅱ.first aid Ⅲ.abandon ship
A. Ⅱ
B. Ⅲ
C. Ⅱ.Ⅲ
D.Ⅰ
86. Under ISM Code, the ship to which it applies has to carry ______.
A. an International Ship Security Certificate
B. an International Oil Pollution Certificate
C. a Safety Management Certificate
D. an International Ballast Water Management Certificate
87. The objective of ISPS Code is ______.
A. to protect the marine environment
B. to provide a method to avoid an accident
C. to protect the ship from collision
D. to keep terrorism action away from ships
88. According to “MARITIME LABOUR CONVENTION,2006”, The maximum hours of work shall not exceed ______.
A. 14 hours in any 24-hour period
B. 72 hours in any seven-day period
C. 10 hours in any 24-hour period
D. 88 hours in any seven-day period
二、关联题（关联题题干下有4个小题，每个小题4个选项）
第一组
Port State Control (PSC) is the inspection of foreign ships in national ports foe the purpose of verifying that condition of the ship and its equipment comply with the requirements of international conventions and that the ship in manned and operated in compliance with applicable international laws.
The primary responsibility for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions rests with the flag State and if all flag States performed their duties satisfactorily there would be no need for port State control. Unfortunately this is not the case as evidenced by the many marine accidents around the world-hence the need for additional control.
The authority for exercising PSC is the national law based on relevant conventions. It is therefore necessary for a port State to be Party to those conventions and to have promulgated the necessary legislation before exercising PSC. In accordance with the provisions of the applicable conventions, Parties may conduct inspections of foreign ships in ports through Port State Control Officers (PSCOs).
89. The purpose of PSC is ______.
①to check and inspect foreign ships
②to verify the condition of a ship in compliance with requirements of international conventions
③to make sure that the ship is manned and operated well
④to detain ships
A. ①②
B. ②③
C. ①③
D. ①②③④
90. Who will be responsible for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions?
A. PSCOS
B. Ship owners
C. Flag states
D. Port states
91. Before exercising PSC, a port state should ______.
A. become a contracting Party and promulgate regulations for implementing PSC
B. inform ship owners
C. establish procedures
D. inform shipping companies
92. PSC inspection is implemented by ______ through ______.
A. flag states/PSCOs
B. flag states/ship owners
C. port states/PSCOs
D. port states/ship owners
第二组
Almost all failures in the fuel oil system, including the compression being too low, result in the crankshaft rotating more slowly if there is a failure at one or two cylinders fail, and the engine is not fully loaded, the crankshaft rev/min does not decrease, the reason being that the governor ensures that the remaining cylinders are loaded to a correspondingly greater extent. If the engine is already fully loaded, the cylinders that are working normally become overloaded causing a smoking exhaust and higher exhaust temperatures etc. The load must always be reduced until the failure has been located and rectified. The reasons for a cylinder suddenly working at reduced load, or failing completely, may be:
1. a defective or blocked fuel injection valve
2.the fuel oil pump piston seizing in the barrel. This failure can be ascertained by trying to
move the pump?s toothed rack.. Defective fuel pumps must be changed.
3.the compression being too low because of sticking, worn or broken piston rings
4.leaking inlet or exhaust valves
5.no clearance in the valve operation gear
The reasons for the crankshaft rotating more slowly, or stopping completely, can also be :
1.the fuel oil filter being blocked. This failure is identified by decreasing oil pressure after
the fuel oil filter.
2.the fuel oil primary pump?s bypass slide valve sticking in the open position
3.leaking fuel oil pipes or joints
4.water in the fuel oil
5.the regulating mechanism being jammed
6.the governor not functioning correctly
7.the electrical shutdown valve (the monitoring system) being activated
93. This passage is mainly about ______.
A. the failure of reduced rpm
B. the failure of the governor
C. how to ensure the constant rotational speed
D. the reasons for the fuel system to shut down
94. If one or two cylinders fail in fuel oil system the crankshaft rev/min ______.①will invariably decrease ②does not decrease ③will decrease under certain circumstances
A. ①
B. ②
C. ③
D. None of ①②③is true
95. Which of the following is NOT mentioned as the reason for a cylinder suddenly working at reduced load?
A. fuel valve failure
B. failure of fuel pump discharge valves
C. too large gaps of piston rings
D. the fuel oil filter being blocked completely
96. Which of the following is NOT mentioned as the reason for the crankshaft rotating more slowly or stopping?
A. changing from heavy oil to light diesel oil
B. connections leaking
C. there being too much water
D. malfunction of the governor
47期轮机英语考试题目 一单项选择题 A1.The___ engine is used for alternators and some times for main propulsion provide a propeller of between 90 to 120 rpm. A.four-stroke B.two-stroke. C.slow speed D.reversible B2.The abbreviation”MIP”stands for____, A.middle indicating pressure B.mean indicated pressure C.mean pitch D.middle indicated power D3.The cetane number of a diesel fuel oil indicates its____. A.viscosity B.acid content C.heating value D.ignition quality C4.In a two-stroke engine the camshaft rotates at___the enging rotational speed. A.half B.twice C.the same speed as D.four times D5.A diesel enging is similar to a gasoline engine except that the former has no ____. A.cross-head B.cylinder C.connecting rod D.spark plug C6.It is easier to replace a dry cylinder liner than a wet one because____. A.of the thin wall thickedss B.honing makes it easier to maintain the desired oil film C.water seals are not required D.it fits more loosely due to a decrease in heat transfer through the composite wall D7.A main bearing consists of two shells which are secured by means of studs and____. A.tie rods B.though bolts C.lead wires D.bearing caps C8.However fast or slow the combustion rate,it is still a____between carbon,hydrogen,sulph and oxygen that releases heat. A.physical deformation B.state exchange C.chemical reaction D.coalescence A9.During the fuel injection period,fuel pressure must exceed cylinder gas pressure to____. A.ensure penetration and distribution of the fuel in the combustion chamber B.ensure the needle valves is flushed clean duringeach injection C.prevent combustion gas blowback into the open needle valve Dprevent reflected pressure waves when the neddle valve close. 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 walls B11.In a diesel engine closed freshwater cooling system,the amount of coolant flowing through the heat exchanger is controlled by the _____, A.suction pressure regulator B.thermostatic bypass valve C.sea water temperature D.water level in the expansion tank
中华人民共和国海事局 2009年第5期海船船员适任证书全国统考试题(总第48期) 科目：轮机英语试卷代号：803 适用对象：无限、近洋航区3000KW及以上船舶大管轮 （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82题，每题1分，第83题至94题，每题1.5分。 一、单项选择题： 1. The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is . A. they operate between 150 and 450 rpm B. they are connected to the propeller by gearing C. their smaller size and weight D. they can be connected directly to the propeller without gearing 2. The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by . A. large conical springs B. compressed air pressure C. hydraulic pressure D. exhaust gas pressure 3. One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the . A. governor sensitivity B. exhaust temperature C. fuel injection pressure D. speed of the cam shaft 4. The desirable properties or a marine fuel oil should inc lude . A. high flash point and high viscosity B. low flash point and high viscosity C. low heating value and high sulphur content D. high heating value and low sulphur content 5. As the plunger moves upwards in the barrel, injection will commence once the plunger bas the spill ports and the pressure builds up. A. opened up B. closed off C. lined up D. taken off 6. In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces . A. all of the oil used by the engine through a filter B. some of the oil used by the engine through a filter C. some of the oil used by the engine through a centrifuge D. all of the oil used by the engine through a centrifuge 7. Because the circulating water is in a closed loop, is installed to cater for expansion and contraction of the water at different conditions of operation. A. an expansion joint B. a drain tank C. a head tank D. a contraction tank 8. The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the . A. inlet nozzle ring B. turbine wheel blade C. diffuser passages D. inlet volute 9. is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve. A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 10. Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as . A. actuation B. sensitivity C. compensation D. promptness 11. 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. tachometer B. pyrometer C. dynamometer D. calorimeter 12. When the ship is going to enter into the harbor, ____. A. change from heavy fuel oil to diesel oil for main engine B. pumping out bilge water C. change sea chest from high level one to lower level one D. test emergency generator 13. If the jacket water temperature rises rapidly above normal in a diesel engine, you should first . A. place standby cooler in operation B. reduce engine toad C. check thermostatic valve D. clean sea water strainer 14. Air cocks, usually positioned at the in a circulating system, is used to get rid of the air in the system. A. bending joint B. expansion tank C. weld D. the highest point 15. Which of the following conditions could contribute to the cracking of a diesel engine cylinder head? A. Leaking seal ring B. Insufficient heat transfer from the exhaust valves C. Blocked cooling water passages to the head D. Excessive scavenging air provided to the engine 16. of an engine crankshaft can be detected by measuring deflections of' crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 17. can be a direct cause of faulty operation of diesel engine fuel injection nozzles. A. Excessive fuel nozzle holder cooling B. Sediment in the fuel supply C. Distortion of the fuel spray pattern D. Improper atomization of the fuel 18. When fuel is injected late into a diesel engine cylinder . A. the exhaust will be clear B. fuel consumption will be low C. all the fuel will be burned at top dead center D. fuel consumption will be high 19. A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result m the need to adjust the . A. pilot valve opening B. compensating needle valve C. compensating spring tension D. accumulator spring tension 20. Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system? A. Baffle plates that have been bent during prior removal. B. Leaks m the cooler tube nest. C. Operating the engine while maintaining a high sea water outlet temperature. D. A punctured sea water strainer supplying cooling water to the heat exchanger. 21. If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to the engine. A. stop B. start C. speed up D. slow down 22. In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?
中华人民共和国海事局 2006年第3期海船船员适任证书全国统考试题(总第41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. A diesel engine is similar to a gasoline engine except that the former has no ______. A. cross-head B. spark plug C. connecting rod D. cylinder 2. A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ______. A. slow-speed diesel B. medium-speed diesel C. high-speed diesel D. constant-speed diesel 3.Which of the diesel engine components listed increases air density and helps to improve engine operating efficiency? A. Impeller B. Compressor C. After-cooler D. Exhaust diffuser 4.For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four- stroke/cycle diesel engine because ______. A. it has a longer power stroke B. more air gets into the cylinder each stroke C. it develops twice as many power strokes at the same speed D. higher combustion pressure is developed 5.The intake valves in a diesel engine are reseated by ______. A. cam followers B. push rods C. combustion gases D. valve springs 6.According 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 system B. the pulse Doppler system C. the pulse system D. the pulse interval system 7.An over-speed safety device is usually fitted to a generator engine for______in the event of over- speed. A. cutting power off the engine B. increasing the fuel pump setting C. braking the crankshaft D. stabilizing the ship speed 8.What preventative maintenance 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 and foreign matter. 9.Immediately after any diesel engine is started, the engineer should check the ______. A. crankcase pressure B. lube oil pressure C. seawater pressure D. exhaust temperature 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.In motor ship, ______is often used to recover some of the heat carried in the exhaust gases from the main engine. A. an diesel oil heater B. a waste heat boiler C. a fresh water generator D. a donkey boiler 12.An exhaust gas bypass is installed on a waste heat boiler in order to ______. A. bypass exhaust gas at high loads to prevent excessive back pressure B. bypass a portion of the exhaust gas at peak loads for better efficiency C. recycle exhaust gas to the turbocharger D. minimize moisture condensation in the boiler gas passages at low loads 13.Prior to lighting off a cold automatically fired auxiliary boiler, you should ______. A. check and regulate the water level B. close the air cock once fires are lit C. blow down the gage glass D. assure protective steam flow 14.Flame failure in an automatically fired auxiliary boiler can mostly result from a/an ______. A. incorrect electrode setting B. incorrect nozzle position C. clogged fuel nozzle D. broken high tension lead 15.Waterside scale in a fire-tube boiler may cause ______. A. increased heat transfer B. fireside erosion C. high steam demand D. overheated tubes 16.Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? I. Its discharge is continuous; II. It has no internal valves; III. Upon accidental closing of discharge valve, excessive pressure will not build up A. I, II B. II, III C. I, II, III D. II only 17.Why are removable sleeves installed on centrifugal pump shafts? A. They make it easier to replace the pump shaft packing. B. They can be economically replaced as they wear out. C. They can be removed when it is necessary to lighten the weight of the pump. D. They increase the strength of the shaft. 18.If one of the bilge system manifold valves does not properly seat, the ______. A. bilge well connected to that valve, plus the second bilge well being pumped will be completely emptied B. bilge system will lose vacuum and prevent the other bilges from being pumped out C. bilge well aft connected to that valve will siphon(虹吸) its contents to the forward bilge wells D. discharge pressure will be too high. 19.Which of the listed statements is correct concerning the starting of centrifugal pumps? A. They should always be started with the discharge valve closed. B. They should always be started with the discharge valve opened. C. A priming pump is always required to flood the impeller suction. D. They should always be started with the sealing line valves closed. 20.The simplest method to use for determining if a centrifugal pump is operating as designed, is to ______. A. closely observe the pump discharge temperature B. close off the discharge valve, and watch for a rise in pressure C. momentarily close off the suction valve, and watch for a rise in pressure D. use a clamp on ammeter and compare the readings to past records
中华人民共和国海事局 2007年第2期海船船员适任证书全国统考试题(总第43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 engines, the diesel engine is ______ used engine on board. A. Between/more commonly B. Among/the most commonly C. Between/not more commonly D. Among/ not the most commonly 2.The average pressure exerted on a piston during each power stroke is termed ______. A. indicated horsepower B. mean effective pressure C. exhaust back pressure D. compression pressure 3.The cetane number rates fuels for diesel engines according to its ______. A. antiknock characteristics B. ignition qualities C. rates of vaporization D. viscosity 4.The time between injection and ignition of the fuel is known as ______. A. turbulence lag B. after burning ratio C. pre-ignition lag D. ignition delay 5.______ controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion. A. The viscosity regulator B. The temperature controller C. The flow meter D. The pressure switch 6.Constant cooling the various components of diesel engine has a number of functions except for ______. A. good lubrication B. low thermal stress C. good mechanical properties D. acid corrosion 7. A device which functions to bring a diesel engine to a full stop to protect it from damage is known as a/an ______. A. torque limiter B. over-speed trip C. over-speed governor D. load limit governor 8.Engine speeds at which resonance can occur are termed ______. A. maximum speeds B. full speeds C. sea speeds D. critical speeds 9.Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can ______. A. increase power output B. decrease lube oil viscosity C. eliminate fuel knock D. cause sulfuric acid formation 10.______ on a ship transmits power from the engine to the propeller. A. The automatic control system B. The speed regularly system C. The transmission system D. The compression air system 11.In a _____ boiler the hot gases from the furnace pass through the tubes while the water is on the outside. A. water-tube B. fire-tube C. exhaust gas D. composite 12.The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ______. A.salinity is abnormally B.high steam demand is too high C.feed-water flow is low D.water level is abnormally low 13.The water in a steaming auxiliary boiler should be tested daily for ______. A. dissolved oxygen B. chlorides C. sludge D. dissolved nitrogen 14.Ignition failure in an automatically controlled auxiliary boiler could be caused by ______. A. carbon deposits on the flame scanner B. high fuel oil temperature C. low fuel oil viscosity D. high steam pressure 15.The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of ______. A. seawater contamination B. frequent surface blows C. dissolved oxygen de-aeration D. frequent bottom blows
试题二十三 一、单项选择题： 1.Because the castings of smaller engines are not so big and heavy, ______ and cylinder block may be made in one piece. A. the column B. the jacket C. cylinder cover D. cylinder liner 2.______ of an engine crankshaft can be detected by measuring deflections of crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 3. A common trouble with the fuel pump plungers or fuel valve spindle is______. A. broken down B. stuck C. oil leakage D. carbonized 4.Diesel fuel oil having a low cetane rating can result in ______. A. improved cold weather starting B. smoother engine operation C. combustion knock D. reduce ignition lag 5.______ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank. A. A filter B. A centrifuge C. A distiller D. A generator 6.The emulsion of the oil is mainly caused by ______. A. the solid impurities of large particle B. the solid impurities of fine particle C. the water content D. both water and solid impurities 7.Cylinders of marine diesel engines are normally cooled by ______. A. sea water B. fine mineral oil C. sanitary water D. fresh water 8.______ are fitted in the exhaust system and facilitate charge removal and scavenging in each cylinder. A. Diffusers B. Compressors C. Steam boilers D. Soot blowers 9.______ device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed. A. An automatic B. A transmission C. A self-regulating D. An interlocking 10.The difference between a supercharged engine and an un-supercharged engine is that ______ operates at an increased pressure. A. the later B. the latter C. the former D. the farmer 11.______ for attachment to the propeller shaft also accommodates the turning gear and is integrally forged with the crankshaft. A. The coupling flange B. The camshaft C. The cross-head pin D. The cylinder jackets 12.A(n) ______is a chemical or electro-chemical attack on the metal surface which may be further increased if the sea-water is polluted. A. errosion B. corrosion C. cavity D. scouring 13.The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being ______. A. shut B. closing C. opened D. closed 14.The governor of a generator engine is to ______. A. make the engine stop
第46期轮机英语试题 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 is termed A indicated B ean effective pressure C exhaust back pessure D compression 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 each __ 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 starting 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 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 C fewer power strokes per revolution D greater weight /size requirements A9. _____controls the fuel oil temperature in order to provide oil at the correct 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 walls C11 A large ,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 impeller 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