轮机英语38期805试题
中华人民共和国海事局
2005年第3期海船船员适任证书全国统考试题(总第38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.Bedplates are the ______of the engine, without the support of which the shaft alignment in
particular, and engine structure as a whole, would inevitably be lost.
A. hull
B. projection
C. graphitication
D. foundation
2.Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?
A. Exhaust and scavenging.
B. Scavenging and compression.
C. Ignition and expansion.
D. Exhaust and compression.
3.Which of the following may lead to the engine NOT to start on air?
A. starting air pressure too high.
B. correct timing of starting air valves.
C. three of the six starting valves stuck..
D. the turning gear disengaged.
4.The lowest temperature required to cause self-sustained combustion of a substance independent
of any outside source of ignition is called ______.
A. explosive range
B. flash point
C. ignition temperature
D. combustion temperature
5.The function of a lubricating oil is ______to lubricate the running surface ______to carry away a
great deal of heat.
A. not/but
B. neither/nor
C. either/or
D. not only/but also
6.The degree to which the viscosity of an oil will change with a change in temperature is indicated
by the ______.
A. weight designation
B. viscosity index
C. pour point
D. thermal change value
7.All three systems have the ports____to swirl the incoming air and direct it in the appropriate path.
A. angled
B. rounded
C. being angled
D. being rounded
8.Scavenging in a four-stroke/cycle diesel engine occurs during the ______.
A. last part of the exhaust stroke, and the first part of the intake stroke
B. last part of the intake stroke only
C. early part of the injection stroke only
D. early part of the power stroke
9.______in what position the engine stops there will always be at least one of the cylinders with its
starting air valve open to admit compressed air to start the engine.
A. Because
B. Owing to
C. For
D. No matter
10.The process to remove exhaust gases by blowing in fresh air is called ______.
A. charging
B. supercharging
C. starting
D. scavenging
11.Some vessels are equipped with a water lubricated stern tube. When at sea, operating under
normal conditions, the water service valve from the ship's saltwater system to the bearing should be ______.
A. closed, and no leakage permitted across the shaft packing
B. closed, and only slight leakage permitted across the shaft packing
C. opened, and no leakage permitted across the shaft packing
D. opened, and only slight leakage permitted across the shaft packing
12.The required amount in the change of speed necessary before a governor will make a corrective
movement is known as ______.
A. speed droop
B. sensitivity
C. stability
D. promptness
13.The pressure head of a water pump is given in the unit of ______.
A. kg
B. MPa
C. mH 2 O
D. none of the above
14.The pump discharge pressure will be considerably higher than the pressure at the ______.
A. pump entry branch
B. outlet pipe
C. impeller
D. None of the above is true.
15. A feed pump for an auxiliary boiler might lose suction if the ______.
A. boiler water level is low
B. feedwater is too hot
C. boiler steam demand is low
D. feedwater is too cold
16.To operate a centrifugal fire pump at reduced capacity, you should ______.
A. readjust the relief valve
B. throttle the suction line
C. throttle the discharge valve
D. open the priming line
17.______the moveable plate and floating ring inside the pump is very difficult.
A. Having adjusted
B. Being adjusted
C. To adjust
D. Adjusted
18.Strainers, sometimes called______, are devices designed to prevent the passage of unwanted
solids into or further along a system.
A. dampers
B. filters
C. stopper circuits
D. separators
19. A donkey boiler is ______.
A. one to supply steam to the main propulsion turbine
B. an auxiliary boiler
C. A and B
D. neither A nor B
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.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. blowdown the gage glass
D. crack the steam stop to assure protective steam flow
22.The ______is not a(n) component of an oil separator.
A. sliding bowl bottom
B. gravity disc
C. separating disc
D. scum valve
23. A magnetic strainer is used in the diesel engine reduction gear oil system to remove small
particles of ______.
A. water
B. babbitt
C. iron or steel
D. acids
24.In a complete oil/water separator, more oil will separate out onto the underside of these plates and
travel outwards until it is free to rise into the oil collecting space. What’s the meaning of “it”
in the sentence above?
A. a separator
B. oil
C. water
D. an oil collecting space
25.The oil sludge is burnt in the ______onboard. I’ll show you the ashes.
A. boiler
B. main engine
C. auxiliary engine
D. incinerator
26. A burning AC motor would be considered what class of fire?
A. Class ‘ A'
B. Class ‘ B'
C. Class ‘ C'
D. Class ‘ D'
27.In which of the listed hydraulic systems will the installation of an oil cooler be necessary?
A. Constant tension mooring winch system
B. Hatch cover system
C. Watertight door system
D. Internal combustion engine hydraulic starter system
28.No specific period is given for the renewal of the lubricating oil filter element as this should be
done ______a figure of 0.7 bars is shown on the gauge.
A. whatever
B. whenever
C. wherever
D. whoever
29.If a hydraulic pump is overheating, the cause may be ______.
A. excessive internal leakage in the pump
B. low discharge pressure and fluid flow
C. excessive fluid level in the hydraulic reservoir
D. operation of the pump at 100% efficiency
https://www.360docs.net/doc/a88087702.html,pressed air is used on board ship ______.
A. for starting diesel engines
B. in pneumatic control system
C. in pneumatic tools
D. All the above are true.
31.In which of the areas listed would you expect to find the highest salt concentration in a flash
evaporator?
A. Distiller air ejector cooling medium
B. Saltwater heater discharge
C. First-stage internal feed box
D. Second-stage internal feed box
32.Supply the ______before starting an air compressor.
A. fuel oil
B. cooling water
C. steam
D. power
33.Sludge may form in the crankcase of an air conditioning compressor as a result of ______.
A. bubbling refrigerant
B. overheating and oxidation
C. lowered operating temperatures
D. reducing the cloud or flash point
34.Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however ____.
A. toxic
B. flammable
C. explosive
D. all of the above
35.Which of the statements listed concerning heat transfer is correct?
A. Heat is always transferred at a constant rate.
B. Heat transfer rate increases as temperature difference increases.
C. The rate of heat transfer is not affected by temperature difference.
D. The high temperature region is known as a heat sink.
36.If a refrigeration compressor will not start, the reason may be ______.
A. the pressure regulating valve is not closing
B. an excessive lack of refrigerant in the system
C. badly leaking discharge valves
D. worn piston rings
37.In a refrigeration system, if the cooling water to the condenser fails, the ______.
A. box temperature solenoid valve will close
B. expansion valve will close
C. compressor will shutdown
D. king valve will open
38.The power factor of an AC generator operating singularly is determined by the ______.
A. connected load
B. prime mover speed
C. field excitation
D. generator's rated voltage
39. A constant output voltage from an AC generator is maintained by the ______.
A. prime mover governor
B. exciter generator
C. voltage regulator
D. reverse power relay
40.In order to change the direction of rotation of a D.C. motor ______.
I. the field leads must be changed ; Ⅱ. the input leads must be changed
A. I only
B.Ⅱ only
C. either I or Ⅱ
D. neither I or Ⅱ
41.Which of the following should be the FIRST step in removing a generator from parallel operation?
A. Trip the generator off the switchboard.
B. Turn off all electrical equipment.
C. Remove the load from the 'off going' generator.
D. Increase the cycles of the generator staying on the line.
42.The purpose of a main switchboard circuit breaker's reverse-power trip is to ______.
A. prevent main circuit overload
B. protect the circuit breaker blowout coil
C. prevent alternator motorization
D. prevent low voltage tripout 43.In ______the control action is independent on the output.
A. a closed loop control system
B. an open loop control system
C. a boiler control system
D. a steering gear control system
44.Which of the following marine examples belongs to the open loop control system?
A. accommodation heating system
B. steering gear
C. boiler control
D. cargo control
45.The viscosity regulator controls the fuel oil temperature ______provide oil at the correct viscosity
for combustion.
A. in order that
B. because of
C. in order to
D. owing to
46. A transformer in an electric circuit serves to ______.
A. generate its own electrical power
B. transform electrical energy into mechanical energy
C. increase or decrease circuit voltage as required
D. convert AC current to DC current
47.The liquid flowing in the capillary(毛细管) is such that the difference in ______readings taken
before the capillary and after it is related to the oil viscosity.
A. pressure
B. velocity
C. flow rate
D. temperature
48.Domestic water pump is started automatically by ______which operates as the water level falls to
a predetermined level.
A. a level controller
B. a temperature switch
C. a floating ball
D. a pressure switch
49.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. BRC
B. MCC
C. AUT-0
D. AUT-1
50.Low compression of diesel engine may result from ______.
A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above
51.White smoke exhausting from an operating diesel engine may indicate ______.
A. a cracked liner
B. burning lube oil
C. an overloaded engine
D. insufficient combustion air
52.Defective timing gear in a diesel engine may lead to:
A. smoky exhaust
B. starting failure
C. overload
D. over speed
53.Poor combustion in a diesel engine can be caused by ______.
A. high compression pressure
B. low intake air temperature
C. low exhaust pressure
D. high scavenge air temperature
54.An automated diesel engine should normally shut down due to ______.
A. low lube oil temperature
B. high ambient air temperature
C. low lube oil pressure
D. high exhaust system back pressure
55.To successfully reduce an excessively high diesel engine exhaust gas temperature, you should
______.
A. reduce the engine driven fuel pump outlet pressure
B. retard the fuel injector timing to reduce power
C. increase the fuel rack setting
D. reduce the load on the engine
56.______, the engine must be stopped immediately.
A. Should knocking occur
B. If knocking occur
C. Should if knocking occurs
D. If occur knocking
57.Lower suction pressure of a pump may be caused by ______.
A. too much air in the pipe line
B. closed inlet valve
C. empty tank
D. leaky pipe
58.Each journal and pin should be examined for ______and grooving.
A. bridges
B. recesses
C. rears
D. ridging
59. A built-up exhaust valve is one in which ______.
A. the stem and heads are made of different material
B. low-alloy steel is used throughout
C. a replaceable valve disk is welded to the head
D. the self-centering action comes from motion of the valve stem in the guide
https://www.360docs.net/doc/a88087702.html,bustion knock can occur in the cylinders of a diesel engine under any condition permitting
______.
A. a shortened ignition delay period
B. a lean fuel/air mixture
C. excess fuel in the combustion chamber
D. rapid vaporization of injected fuel droplets
61.The bearing cap and shell are replaced and tightened up until ______.
A. the “ nip ”is zero
B. the “ nap ” is zero
C. the “ gap ”is correct
D. the “ clearance ” is correct
62.The resistance of electric wire will decrease as its ______.
A. length increases
B. cross-sectional area increases
C. temperature increases
D. percent of metallic purities increases
63.Oil mist detectors are usually used on board to detect oil mist density within ______.
A. the engine crankcase
B. the engine scavenge boxes
C. drain tanks
D. fuel tanks
64.Tools with ______handles should be used to check electric circuit.
A. plastic
B. metal
C. stainless steel
D. copper
65.The crankcase cover should not be opened until at least ______minutes after the engine stops.
A. 10
B. 15
C. 20
D. 30
66.“Movement of engine no longer required.” means “______”.
A. Stop Engine
B. No Engine Revolution
C. Stand-by Engine
D. Finished With Engine
67.Under the provisions of applicable international conventions, ships entitled to fly the flag of a
Party are subject, while in the port of a Party, to control by officers duly authorized by the Party.
Ships of non-parties or below convention size shall be given ______.
A. more favorable treatment
B. less favorable treatment
C. no more favorable treatment
D. the most favorable treatment
68.The conventions under which the port state control inspection is carried out include all the
following except ______.
A. SOLAS 74
B. MARPOL 73/78
C. STCW 78/95
D. ISM Code
69.If you burned your arm on a bare steam line, the most effective immediate treatment would be
to______.
A. wrap the arm in a tight bandage
B. soak the arm in hot salt water
C. cover the burn with petroleum jelly
D. put the burn in cold water
70.If liquid refrigerant accidentally comes in contact with the eyes, ______immediately.
A. rub the eyes
B. irritate the eyes
C. wash the eyes with a heavy boric acid solution
D. obtain medical help
71.Diesel fuel is relatively safe to handle due to its low volatility（挥发）, but the fumes will self-
ignite and continue to burn steadily if the fuel is heated to the ______.
A. flash point
B. auto-ignition point
C. volatility point
D. upper explosive limit
72.Duty officer informs us that the vessel is out of harbor and in “Full Ahead”.We are going to
run ______.
A. diesel oil instead of fuel oil
B. fuel oil instead of diesel oil
C. diesel oil instead fuel oil
D. fuel oil instead diesel oil 73.A(An) ______should be issued for every company complying with the requirement of the ISM
Code by the Administration.
A. ISM
B. DOC
C. SMC
D. PSC
74.The term “moderate speed” was previously interpreted as meaning a speed which would
enable a vessel ______within half the range of visibility.
A. stopping
B. being stopped
C. to stop
D. to be stopped
二、关联题（每组关联题题干下有4个小题，每小题4个选项）
Each of the engine cylinders is provided with a Bosch, type PF, fuel pump. The fuel pump is a single-acting plunger pump with non-adjustable stroke. The plunger is so accurately ground and
lapped that its clearance inside the barrel is only 0.002-0.003 mm. This provides sufficient
tightness between plunger and barrel, even at pressures as high as 200-400 bar, without the need
for sealing materials. Neither the plunger nor the barrel can therefore be renewed individually.
The plunger pressure stroke is produced by a cam on the engine camshaft, whereas the return
stroke, the suction stroke is effected by means of a strong coil spring. The top of the pump barrel
is closed by a spring-loaded pressure valve, to which the fuel oil pipe for the respective fuel valve
on the relevant engine cylinder is connected.
Regulation of the amount of fuel delivered by the fuel pump is achieved by turning the pump
plunger, the cylindrical surface of which has a milled recess. The bottom of this recess ends with
an edge, which is at right angles to the cylinder generating lines, whereas the top of the recess is
limited by a helix. This produces an inclined control edge on the plunger, which also has a narrow
longitudinal groove. In the pump barrel are drilled two diametrical holes through which the fuel
oil can flow into the fuel pump barrel. The pump barrel is surrounded by a regulating sleeve, the
upper end of which is shaped as a toothed rim. The lower end has two lengthwise slots in which
projecting lugs on the lower end of the plunger can slide up and down. The end of the regulating
rod from the engine governor is designed as a toothed rack that engages with the toothed rim on
the end of the regulating sleeve. This makes it possible to turn the pump plunger during engine
operation.
75.The fuel pump ______.
A. is of PF type
B. is of reciprocating type
C. has an inlet valve and an outlet valve
D. A and B are true.
76.The plunger ______.
A. is accurately ground and lapped outside the barrel.
B. has a tiny clearance inside the barrel
C. can be renewed individually when worn out
D. All of the above are true.
77.Which of the following is true?
A. The stroke of the plunger can be adjusted
B. The outlet valve is spring loaded
C. The plunger down stroke is accomplished by the spring
D. B and C are true.
78.It can be inferred that when moving the rack ______.
A. the sleeve moves up and down
B. the plunger moves up and down
C. the effective stroke of the pump will be changed
D. All of the above are true.
三、中译英（共2题，请将答案写在答题纸上）
79.机舱不够清洁，舱底水中油水混合物过量, 机舱管系包括排气管绝热层有油污，舱底水管
系操作失当。
80.火于20时30分扑灭。主机于2月18日1时启动，船已恢复向XX港航行。
第47期轮机英语
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
轮机大管轮英语真题48期
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?
三管轮轮机英语大证考试真题41期
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
第32期轮机英语考试题
中华人民共和国海事局 2003年第3期海船船员适任证书全国统考试题(总第32期) 科目：轮机英语试卷代号：801 适用对象：无限、近洋航区3000KW及以上船舶轮机长 （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68题，每题1分，第69题至76题，每题1．5分,第77题至78题, 每题10分。 一、单项选择题： 1．______ is fully floating in both connecting rod small end and the piston skirt．A． The piston rod B． The cross head pin C． The gudgeon pin D． The crank-pin 2．When we say that two objects have relative motion, we mean ______． A． the distance between them remains the same B． the distance between them is changing C． the position between them is not changing D． their positions to the earth remain the same 3．The ______ or balance tank collects the re-circulated fuel oil． A． buffer B． sump C． bilge D． overflowing 4．What is the harmful effect of sulfur in a fuel? A． It causes excessive smoking and soot at low firing rates． B． It doesn't readily burn when combined with oxygen． C． It clogs fuel oil strainers more often． D． It forms a corrosive acid when mixed with water or water vapor． 5．The main bearing metal is a lining ______． A． inside the bearing B． outside the bearing C． covering the crankshaft D． none of the above 6．______ neutralizes the acid conditions and ______ cleanses the rings and grooves．A． The detergency/the alkalinity B． The alkalinity/the detergency C． The inhabitant/ the water D． The additives/the distilled water 7．In a central cooling system, used in some modern ships, sea water is supplied to cool ______ which will circulate to other individual cooler, greatly reducing the corrosion problems． A． fresh water B． sea water C． cooling oil D． emulsion 8．An electrically driven automatically operating auxiliary blower is provided for slow speed and ______ of a low speed diesel engine． A． manoeuvring operations B． bad combustion C． cooling D． mooring trial 9．The average exhaust temperature of a two-stroke/cycle diesel engine with a turbine-driven supercharger is lower than a similar four-stroke/cycle diesel engine at equal loads because _______． A． two-stroke/cycle diesel engines have a higher M．E．P． than four-stroke /cycle diesel engines B． four-stroke/cycle diesel engine exhaust is cooled by scavenging air C． two-stroke/cycle diesel engines have a lower M．E．P． than four-stroke/cycle diesel engines D． the opening of the two-stroke/cycle diesel exhaust ports or valves occurs much later than in four-stroke/cycle diesel engines 10．Engine speeds at which resonance can occur are termed ______． A． maximum speeds B． full speeds C． sea speeds D． critical speeds 11．When the propeller blades are integral with the hub, the propeller is called a______．A． built up propeller B． solid propeller C． controllable pitch propeller D． suction back propeller 12．The timing of the injection can be altered by raising or lowering the pump ______in relation to the cam． A． needle valve B． cylinder C． piston D． arm rod 13．______ are commonly used in mechanical-hydraulic governor to sense engine speeds．A． Bulbs B． Bulks C． Flyweights D． Flywheels 14．When ______is operated, a supply of pilot air enables the remote valve to open．A． the distributor B． the air start lever C． the turning gear D． the cylinder air start valve 15．A reduction in load on a diesel engine results in ______ of speed of the crankshaft．A． a reduction B． an increase C． an outing D． a downwards 16．All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low． Which of the following situations is responsible for this condition? A． Excessively early injection timing B． Combustion knock． C． Leaking piston rings．D． Light load． 17．The mechanical efficiency of an engine is always less than 100% _____ losses occurring in the form of friction. A. because B. since C. due to D. owing 18．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 unchanged C． speed is reduced and torque is increased D． speed is sometimes unchanged while torque is increased 19．The ab breviation “TDS” about the potable water probably means ______． A． total dissolved solids B． temperature of distillation of sea water C． total dissolved sodium D． total delivery system 20．Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid ______ pressure． A． depending on B． in relative to C． regardless of D． because of
轮机英语历年真题43期
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