第38期轮机英语考试题
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：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.______of the A-frames there is a strong cast iron frame called the scavenging air box.
A. At the top
B. At the bottom
C. In the top
D. In the bottom
2.working with which of the following types of diesel engine arrangements is a waste heat boiler
most likely to produce the maximum steam pressure, temperature, and flow conditions?
A. Supercharged, four-stroke/cycle diesel engine.
B. Supercharged, loop scavenged diesel engine.
C. Turbocharged, crossflow scavenged diesel engine.
D. Turbocharged, return flow diesel engine.
3.The auxiliary engine and the a.c. generator can be connected with the______.
A. cam
B. crosshead
C. bulge
D. coupling
4.A: Please tell me the specification and quantity. B: ______.
A. Pump diesel oil first
B. 300 tons of 180 cSt fuel oi l
C. The figure is all right
D. OK, I'll sign it
5.The lube oil to lubricate the surfaces of the cylinder liners is spread over by the ______.
A. sliding piston rings
B. engine's camshaft
C. small pumps
D. forced feed system
6. A lube oil filter can be used to remove most contaminants from lube oil. A contaminant which
will remain in the lube oil after filtering is ______.
A. abravise
B. fuel oi l
C. sediment
D. impurities
7.______provide the water to the pistons.
A. Pneumatic pipes
B. Hydraulic pipes
C. Telescopic pipes
D. Operating gas pipes
8. 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
9.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 forme r
D. the farmer
10.Engage the flywheel with the ______.
A. turning gear
B. motor
C. driving gear
D. driven gear
11.Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ______.
A. apparent slip
B. true slip
C. pitch
D. propulsive efficiency 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.The process of loop scavenge is that the exhaust will be via ports______the air ports and
controlled by the same piston.
A. behind
B. far from
C. adjacent to
D. in front of
14.When the follower is on the base circle of the cam with a normal shape, the pump plunger is at
the ______of its stroke.
A. top
B. nip
C. bottom
D. middle
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 following possible causes should be investigated.
A. Should the engine stop without apparent reason
B. The engine should stop without apparent reason
C. The engine stops without apparent reason
D. The engine is stopped without apparent reason
18. A large low speed main propulsion diesel engine may become overloaded by______.
I. a heavily fouled hull II. strong head winds and heavy seas
A. I only
B. II only
C. both I and II
D. neither I nor II
19.The control mode in which the final control element is moved from one of two fixed positions
to the other is known as ______.
A. dead band action
B. neutral zone action
C. range
D. on-off action
20.Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by
______.
A. a compressed packing gland
B. lantern rings between the packing rings
C. a liquid seal
D. the stuffing box gland
21.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
22.Waterside scale in a fire-tube boiler may cause ______.
A. increased heat transfer
B. fireside erosion
C. high steam demand
D. overheated tubes
23.Excessive alkalinity of the water in an auxiliary boiler can cause ____________.
A. caustic embrittlement of the boiler metal
B. acidic corrosion of the boiler metal
C. hard scale deposits on the boiler tubes
D. etching of the heat exchange surfaces
24.When an auxiliary boiler is panting and emitting black smoke, you should _____________.
A. increase the fuel oil temperature.
B. decrease the fuel oil temperature.
C. decrease the fuel oil supply pressure.
D. increase the air supply.
25.There is a ______in the bilge system.
A. booster pump
B. evaporator
C. bilge pump
D. cooler
26.Strainers and fine filters should be cleaned at intervals, ______ prevent dirt from getting under
a fuel injection pump valve.
A. in order that
B. so as to
C. so that
D. in addition to
27.The oil sludge is burnt in the ______nboard. I’ll show you the ashes.
A. boiler
B. main engine
C. auxiliary engine
D. incinerator
28. A shipboard oil pollution emergency plan is required on ______.
A. all vessels, regardless of size and commercial application
B. any barge or other ship which is constructed or operated in such a manner that no oil in any
form can be carried aboard
C. an oil tanker of 150 gross tons or above, or other ship of 400 gross tons or above
D. an oil tanker of 400 gross tons and above, or other ships of 150 gross tons and above
29.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
30.In the hydraulic system, ______ is the actuator.
A. oil pump
B. control valve
C. hydraulic motor
D. fittings
31.The usual number of single-acting pistons used in a variable stroke axial-piston pump is ______.
A. 3 or 5
B. 5 or 7
C. 7 or 9
D. 9 or 11
32.The hand steering is a method by which the motion of the rudder is controlled with ______.
A. a motor-driven steering wheel
B. a pneumatic steering wheel
C. a hand-driven steering wheel
D. an electric steering wheel
33.The control rod of a steering gear pump is attached at its outer end to ______.
A. the hunting gear
B. the rudder stock
C. the rudder controller
D. the feedback unit
34.The main steering gear must be able to steer the ship at maximum ahead service speed and be
capable at this speed, and at the ship’s deepest service draught, of putting the rudder from 35 degrees on one side to 30 degrees on the other side within no ______.
A. more than 28 seconds
B. more than 60 seconds
C. less than 28 seconds
D. less than 60 seconds
35.If an air compressor is used to supply compressed air to outlets throughout the engine room and
on deck of a vessel, the system is known as the ______.
A. combustion control air system
B. supply air system
C. ship's service air system
D. inertia gas system
36.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
37.The primary task of the compressed air system is to deliver the starting air necessary for ______.
A. starting the M.E.
B. starting the emergency electric alternator
C. driving the main turbine
D. driving the turbocharger
38.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.
39.Which of the listed characteristics can be applied to R-12 vapor?
A. It is corrosive.
B. It is odorless.
C. It is visible as a blue fog.
D. It has a distinctive taste.
40.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.
41.In the refrigeration system, a shortage of refrigerant is indicated by ______.
A. the compressor short cycling on high pressure cut out switch
B. high suction pressure
C. high head pressure
D. bubbles in the sight glass
42.The dew point of air is reached when the wet bulb temperature is______.
A. twice the dry bulb temperature
B. 10℃ above the dry bulb temperature
C. 5℃ above the dry bulb temperature
D. equal to the dry bulb temperature
43.An emergency bilge pumping system is provided and should be ______ of the main bilge
pumping system, according to the SOLAS 74 Convention.
A. dependent
B. independent
C. in series
D. in parallel
44.Oil Mist detectors used on large low-speed main propulsion diesel engines monitor and check for
the presence of ______.
A. fuel oil vapor at the sludge tank vent
B. unburned fuel vapors in the scavenge air receiver
C. lube oil vapors in the crank case
D. lube oil vapors in the engine room
45.The operation of paralleling two alternators requires the voltages to be ______and also in phase.
A. zero
B. eliminated
C. different
D. equal
46. 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
47.Moisture in a D.C. motor would cause ______.
A. short circuit
B. speed up
C. slow down
D. hunting
48.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.
49.______control system is one in which the control action is independent of the output.
A. Feedback
B. Negative feedback
C. Close loop
D. Open loop
50.“ gauge pressure ” means ______.
A. vacuum
B. the excess of pressure above atmosphere
C. figure on a gauge
D. any of the above
51.An operational amplifier, as used in today's consoles, has a calculated gain of 5. This means that
when the input changes ______.
A. 5 volts, the output changes 10 volts
B. 10 volts, the output changes 5 volts
C. 2 volts, the output changes 10 volts
D. 10 volts, the output changes 2 volts
52.The 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
53.Diesel engine automated control systems may utilize sensing devices of dual function, with
sensing ranges providing both alarm and engine shut down capability. Which of the key points listed would only require an alarm sensor?
A. Lube oil pressure and temperature.
B. Jacket water pressure and temperature.
C. Engine over-speed.
D. Lube oil sump level.
54.Control of the main propulsion diesel engines can be shifted from the engine room to the
wheelhouse from the ______.
A. wheelhouse control station
B. engine room control station
C. captain's office
D. chief engineer's office
55.______shall be continuously powered and shall have an automatic changeover to a stand by
power supply in case of loss of normal power supply .
A. Cooling system
B. Alarm system
C. The air conditioning installation
D. The mooring equipment
56.Ambient temperature is the ______.
A. amount of temperature rise with no load
B. temperature of the compartment where the motor is located
C. normal operating temperature, less the room temperature
D. amount of temperature developed by an operating motor
57.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
58.At an unsheltered anchorage the chief engineer officer shall consult with ______whether or not to
maintain an underway watch.
A. the engineer officer in charge of watch
B. the deck officer in charge of watch
C. the master
D. the chief mate
59.After he ______the test, the engineer put down the results.
A. has finished
B. finishes
C. had finished
D. would finish
60. A moving object will not accelerate or decelerate ______a force is applied to it.
A. whether
B. if
C. unless
D. till
61.All members of the engineering watch shall be familiar with assigned watch-keeping duties.
In addition, every member shall, with respect to the ship they are serving in, have knowledge of ______.
I. the use of appropriate internal communication systems.
II. the use of GMDSS.
III. the escape routes from machinery spaces.
IV. the number location and types of fire-fighting equipment in the machinery spaces.
A. I+III+IV
B. II+III+IV
C. III+IV
D. I+II+III+IV
62.This machine ______out of order, but now it works well.
A. is used to be
B. was used to be
C. used to be
D. was used to
63.The order“Bow thrust stop.”means“______”.
A. Bow thrust full to port
B. Bow thrust full to starboard
C. No bow thrust revolutions
D. No stern thrust revolutions
64.Seawater may be used for drinking water ______.
A. at a maximum rate of two ounces per day
B. after mixing with an equal quantity of fresh water
C. if gather during or immediately after a hard rain
D. under no circumstance
65.Your vessel has run aground and upon taking fuel oil tank soundings. you find that a fuel tank
level has increased. You therefore should suspect ______.
A. condensation in the fuel tank
B. a crack in the hull portion of the fuel tank
C. a load of bad fuel
D. contamination from the saltwater flushing system
66.Which of the actions listed should be taken by the engineer on watch when the general alarm is
sounded continuously for 10 seconds?
A. Engine room ventilation should be started.
B. Main engines should be secured.
C. The fire pump should be started.
D. The fixed CO2 system should be activated.
67.The company should establish procedures to ensure that the ship is maintained_____ the
provisions of the relevant rules and regulations.
A. out of accordance with
B. in relation to
C. in conformity with
D. in connection with
68.The main objective of the SOLAS Convention is to specify _____ for the construction, equipment
and operation of ships, compatible their safety.
A. at most references
B. at least references
C. maximum standards
D. minimum standards
二、关联题（每组关联题题干下有4个小题，每小题4个选项）
第一组：
Beck Smith, a PSCO from Port Hamburger, is carrying out an inspection in the machinery space of M/V SUN. Here is a dialogue between the PSCO and the Chief engineer.
PSCO: Chief engineer, your escape route marked in arrows at stairs, or corridors to emergency exit should be clearly sighted in dark. These marks should be smeared in fluorescence in order to evacuate when lighting is cut off.
Chief Engineer: OK, I will rectify this as quickly as possible.
PSCO: One more, your pumping line may slightly leak oil
Chief Engineer: No. Our pumping line has no trouble at all.
PSCO: Trust me. I have served Chief Engineer for many years. There is somewhere leaking oil.
Chief Engineer: How do you know?
PSCO: Oil tank bottom is very clean but with oily brightness. Significantly, you prepared for PSC inspection for quite a long time. As leaking oil, you cleaned second time just now.
Chief Engineer: You are very smart! Yes, one small place leaked oil and I planned to fix it after PSC inspection because time is limited.
PSCO: Let me check the leaking oil place and assist you to find out a solution.
Chief Engineer: Thanks.
PSCO: According to your record, you have used oily water separator to handle oily water. I found your inlet valve of the machine is dry and rusty. I suspected that your record is untrue. Where is your 50 tons oily water? Did you pump out in high seas?
Chief Engineer: We pumped into another ship.
PSCO: What is the ship’s name/call sign or another identification?
Chief Engineer: I forgot.
PSCO: You can’t tell the ship’s name, call sign. And 50 tons of oily water were missing. But your engine log book was recorded to pump out water with handling of oil purifier.
Obviously, your record is not right. And you pump out oily water in high seas. In
compliance with MARPOL 73/78 Convention you must pay a fine.
69.What about the evacuation route in the engine room of M/V SUN?
A. There is no evacuation route in the engine room.
B. The escape route is not marked in arrows at stairs or corridors to emergency exit.
C. The escape route can be clearly sighted in dark.
D. The escape marks are not smeared in fluorescence.(荧光)
70.Which of the following is TRUE according to the dialogue?
A. There is no trouble with the pumping line.
B. The oil tank bottom is very clean without any oily brightness.
C. The engine room officers and ratings do not care for the PSC at all.
D. The PSCO used to be a Chief Engineer.
71.How did the PSCO determine the ship pumped out the oily water overboard?
A. The oily water separator has not been used for a long time.
B. The inlet valve of the oily water separator is dirty.
C. The oily water separator is inoperative
D. There is not any record in the engine room log book
72.The word “fine” in the last sentence means _____.
A. happiness
B. kindness
C. small piece
D. money
第二组：
The diesel engine is a form of internal combustion engine similar to that used in a bus. Its power is expressed as brake horsepower. This is the power put out by the engine. Effective horsepower is the power developed by the piston in the cylinder, but some of this is lost by friction within the engine. Large diesel engines, which have cylinders nearly 3 ft in diameter, turn at the relatively slow speed of about 108 rpm. These are known as slow speed diesel engines.
They can be connected directly to the propeller without gearing. Although higher power could be produced by higher revolutions, this would reduce the efficiency of the propeller, because a propeller is more efficient the larger it is and the slower it turns. These large slow running engines are used in the larger merchant ships, particularly in tankers and bulk carriers. The main reason is
their low fuel consumption. More and more of the large merchant vessels are being powered by medium-speed diesel engines. These operate between 150 and 450 rpm, therefore they are connected to the propeller by gearing. This type of engine was once restricted to smaller cargo ships, but now they are used in fast cargo liners as well as in tankers and bulk carriers. They are cheaper than slow speed diesel engines, and their smaller size and weight can result in a smaller, cheaper ship.
73.The diesel engine is similar to the gasoline engine in that _____.
A. both of them are ignited by compressed air
B. both of them are the forms of external combustion engines
C. both of them have spark plugs
D. the power is developed by the piston in the cylinder
74.Which of the following statements is FALSE?
A. The slow speed diesel engines can be connected to the propeller without reduction gearing
B. Higher power of the engine could be produced by higher rpm
C. Higher power of the engine would increase the efficiency of the propeller
D. The slower the propeller turns, the higher its efficiency will be
75.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
76.The brake horsepower is _____.
A. effective horsepower
B. the power put out by the engine
C. the power developed by the piston in the cylinder
D. the power developed by the propeller
三、中译英（共2题，请将答案写在答题纸上）
77.在港口国监督检查中，根据SOLAS 74，下列缺陷可以作为船舶滞留的明显理由：
1) 推进及其他关键设备，包括电气装置，不能进行正确操作
2)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
3)应急发电机，应急照明，应急蓄电池组及应急开关不能正确操作使用
4)主辅舵机无法操作
78.2月17日19时40分滚装船/集装箱船XX号的主机扫气箱和1号涡轮增压器着火，冒
出浓烟。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。计划抵达卸货港后打开1号涡轮增压器进行检查。某些缸的排气温度不正常，但未发现严重损坏。
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
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?
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