1.When using a handheld hacksaw,you should apply pressure only on the forward stroke ____D
A only when cutting thin wall tubing
B only when cutting carbon steel
C only when cutting conduit
D at all times
2. the primary function of an electric motor is to __A
A develop torque
B generate high voltages
C produce a magenetic field
D generate high electrical resistance
3. which of the following can be used in transmission system usually?A
A .hydraulic oil
B Animal oil
C light oil
D fuel oil
4.if the ordered spare parts have been modified by manufacturer,which of the following should be paid attention to specially?A
A quality
B reliability
C price
D applicability
5.when fighting a spreading fire resulting from a fuel line,you should FIRST___
A look for a CO2 extinguisher
B use a soda acid extinguisher
C shut off the fuel supply
Dsmother the fire with rage
6 according to MARITIME LABOUR CONVENTION 2006,the employment engagement or work of seafarers under the age of 18 shall be prohibited where the work ___B
A is began at 06 am
B is likely to jeopardize their health or safety
C is likely to harm other people s life
D is proceeding under bad weather
7.Efficient bilge water treatment will contribute to the followings except____
A minimizing the impact of ship propulsion on the marine environment
B maximizing the heavy fines that ship operates can face for pumping oily bilge water overboard
C reducing the need for waste disposal ashore
D reducing the cost of waste disposal ashore
8.When received the order Finished With Engine which of the following is wrong?
A stop the LO pump ,SW pump jacket water cooling pump immediately
B stop the FO booster pump
C engage the turning gear turn the main engine
D open the main engine scavenge air trunks drain cock
9.A properly honed diesel engine cylinder liner will
Aprevent piston ring wear
B shorten the ring break in period
Cprewvent cylinder liner glazing\
Dappear slick and glazed
10the spur gerred mooring winches have advantages over worm geared ones in Ahigher efficiency of the gear train while reversing
Bthe higher gear ratio
Che multi start feature
Dhigher recovering speed
11An alternator is being paralleled with one on the line At the instant the circuit breaker is closed the frequently of the incoming alternator will normally
Aincrease
Bnot change
Cdecrease
D be exactly 60 hertz
12____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
13 When securing a flash type evaporator for an extended period of time you shoud
A Fill the unit with saltwater
B fill the unit with descaling compound
Ccompletely drain the unit
Dtightly seal the unit to exclude air
14which of the processes listed would be the most satisfactory method to use lower the humidity of the air being circulated by an air conditioning system
Acooling the air to a temperature just above dew point \
B heating the air to a point at which moisture will boil off then re cooling it Ccooling the air to a point below dew point then reheating it \
Dheating the air and then cooling it to a point below dew point
15the gear and screw pumps are classified as
Avarible stroke pumps
B multistatge pumps
Cpositive displacement pumps
Dtriple ported pumps
16 the correct statement about the generator paralleling off operation is B
Apush the paralleling off button directly
Bransfer the load and then perform the paralleling off operation
Cpush the paralleling off button when the power is nearly zero
17Electrical circuits are protected against overheating by means of a/an_____A Acircuit breaker
Bamplifier
CDiode
Dcapacitor
18.Current regulations with respect to the discharge of oily water set limits of concentration 15 parts per million. A monitor is required to measure these values and provide both continuous records and an alarm where the permitted level is exceeded. The principle used is that of ultra-violet fluorescence. This is the emission of light by a molecule that has absorbed light. During the short interval between absorption and emission, energy is lost and light of a longer wavelength is emitted. Oil fluoresces more readily than water and this provides the means for its detection. A sample is drawn off from the overboard discharge and passes through a sample cell. An ultra-violet light is directed at the sample and the fluorescence is monitored by a photoelectric cell. Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operated. The discharging liquid is then passed a to slop tank.
(1)A monitor can obtain all of the following functions except___C
A measuring oil content values
B providing continuous records
C lowering the oil content below 15ppm
D providing an alarm unit warning of levels of discharge in excess of 15ppm
(2)A sample is drawn off from __D and passes through a sample cell
A bilge water
B discharge of oil separator
Cslop tank
D discharge of oily water separator
(3)the passage is mainly about ___D
A oil pollution
B current regulations related to oil pollution
C oil in water monitor
D the principle of ultra-violet fluorescence
(4)from the passage, we can learn that the ultra –violet fluorescence
Is a kind of _____D
A oil sample
B light
C photoelectric
D alarm unit
19.in an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces ___B
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
20.for the oil purifier the water content of the oil is continuously__ D and when a
pre-set maximum level is reached a total discharge function is automatically actuated Acharged
Bcompensated
Ccomputed
D monitored
21disinfector used in the sewage biological treatment plant usually is __C
A chlorine
B ozone
C hypo-calcium chloride
D calcium oxide
22in china the administration for implementing SOLAS convention is___B
A the harbor bureau
B the government of the flag state(MSA)
C the ship classification society
D ship company
23the minimum height of the head tank may be based on maintaining __D of fresh water in the heat exchanger above that of the sea water to ensure that in the even t of a small internal leak developing sea water cannot enter the fresh water system. Atemperature
Bflow quantity
Cweight
D pressure
24when bilge water is heated in a holding tank which one of the following statements is not accurate?D
Athe relative high temperature facilitates primary gravity separation
Bmost of the oil and organic solvents are raised to the top layer
C the relative higher the temperature is the more the top oil will be collected
Dthe normal high temperature has little use on the separation of emulsified oil
25motor vessels usually have independent lube oil systems for main engine and main reduction gears because __B
A coolers are not needed for the gear system
B contaminants produced by the engine could harm the reduction gears
C non-addittive oils are used in the main engine system
D differnt type centrifuges are required for the main engine and reduction gear lube systems
26.__B should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment
Athe watch keeping personnel
B the chief engineer
Cthe person on a bunker barge
D the duty deck officer
27 .A class‘C‘ fire would most likely occur in the __B__
A engine room bilges
B main switchboard
C paint locker
D rag bin
28.the core item in the oil record book part I is _A_ and its main content is __.
A Item A,BALLAST OR CLEANING OF FUEL OIL TANKS
B Item B,DISCHARGE OF DIRTY BALLAST OR CLEANING WATER GROM FUEL OIL TANKS REFERRED TO UNDER SECTION(A)
C Item C,DISPOSAL OF OIL RESIDUES(SLUDGE)
D Item H,BUNKERING OF FUEL OIL
29.Fuel injection uses the jet pump system and a Woodward type hydraulic__is used To control engine speed.
A controller
B governor
C instrument
D apparatus
30.Syuchroscope and synchro indicating lights are locatsd on D of main switchboard.
A.load panel
B.emergency generator control panel
C.battery charging and discharging panel
D.paralleling panel
31.Which of the following should always be checked prior to starting a diesel engine? C
A.Air filters
B.Fuel oil strainers
C.Crankcase oil level
D.Pyrometer readings
32.The compound wound generator has D sets of field coils.
A.one
B.two
C.three
D.four
33.The officer in chage of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can be immionediately be placed in the manual mode of operation when notified that the ship is C .
A.at anchor
B.at unsheltered anchorage
C.in congested waters
D.in an open road-stead
34.Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the C .
A.cooling water leaving each cylinder
B.fuel oil entering the injector
C.exhaust gases at various locations
D.lube oil at the bearing supplies
35.The company should ensure that B documents are promptly removed.
A.absolute
B.updated
C.outdated
D.new
36.For the fuel oil purfier, a higher throughput and more efficient process can be achieved if the fuel is A .
A.heated to reduce its viscosity
B.cooled to reduce its temperature
C.heated to reduce its density
D.heated to reduce its gravity
37.The average pressure exerted on a piston during each power stroke is termed
B .
A.indicated horsepower
B.mean effective pressure
C.exhaust back pressure
https://www.doczj.com/doc/d59932701.html,pression pressure
38.If an oil spill occure on deck, you should B .
A.cover the area with foam
B.cover the area with absorbent materal
C.wash down immediately with a fire hose
D.wash down immediately with an oil dispersing solvent
39.Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump is a reaultof A .
A.cavitation
B.water hammer
C.fluid friction
D.stean knock
40.The ISM Code is a part of A .
A.SOLAS
B.MARPOL
C.STCW
D.Ballast Water convention
41. A is used by the controller to adjust the fuel racks to return the engine speed to required.
A.the rpm deviation
B.the exhaust gas temperature deviation
C.the vibration deviation
D.the fuel ranks position deviation
42.Diesel engine are remarkably simple in principle and require little in way of B although what little is required iss essential to a long life.
A.cleaning the lubricating oil filters and seeing that their strainer inserts are free from defects.
B.the routine maintenance to the diesel engine
C.the running hours of the diesel engine at full speed
D.the use of heavy fuel oils containing asphalt
43.Starting air valves are held firmly on their seats by B .
A.cam rollers on the camshaft
B.spring force
C.air pressure on top the valve differential piston
D.air pressure on the bottom of valve differential piston
44.UMS stnds for D in the maritime subject.
A.ultra much space
B.unversal medium system
C.unit machined space
D.unattended machinery space
45.According to what is the cargo handling equipment reted? A
A.the safe working load to be lifted
B.the capacity of the drive motor
C.output of the winch
D.cargo handling wires
46.Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out? C
A .de-energize the appicble switchboard bus
B .bypass the interlocks
C .secure and tag the supply circuit breaker in the open position
D .station a man at the circuit supply switch
47.
(1)According to the passage, the rotating units of a split windlass d on‘t include
C .
A.a cable lifter
B.a mooring drum
C.a chain locker
D.a warp end
(2)which of the following statement is correct? B
A.A more recently development,particularly on larger vvessels,is the split windlass where one machine is used to handle both anchors.
B.The word ―machine‖ in the passage refers to the windlass.
C.anchor capstans are used in some installation where the cable lifter rotates about a horizontal axis.
D.both the cable lifter unit and driving machinery are located on deck
(3)one of the functions of a dog clutch is C .
A.to transmit the motor drive to the shaft
B.to hold the cable lifter and moorig drum when the power is switched off
C.to engage or disengage the rotating units of split windlass separately
D.to handle both anchors
(4)the word‖assembly‖ in the sentence ? a spur gear assembly transmits the motor drive to the shaft where the various dog clutches enable the power take-off ? is as the same meaning as A
A.unit
B.shaft
C.dog clutch
D.spurling pipe
48.which of the following problem may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system
A.external seal leakage
B.hunting due to fast response
C.hydraulic oil film breakdown
D.increased power consumption
49. C is not on the control panel of the emergency generator
A.voltage transformer
B.current transformer
C.reverse-power relay
D.voltage regulation device
50.which of the following is NOT included in the things to done before bunkering? B
A.plug all deck scuppers
B.enter the information in the engine log and oil record book
C.position ―NO smoking‖ sign
D.record vessel draught and trim.
80题
[关联题]During normal operation on heavy oil at sea, the is taken from the OH tanks,where it is stored. First, it is fed through
A heater and next through a centrifuge for purification.It may then pass through a cooler, being discharged to the steam heated heavy oil service
Tanks. Two of these are usually fitted and they are used alternately .One tank is in use ,while the other is being filled .These tanks are heated to
A moderate temperature and self closing drain valves are fitted to remove any water or sludge which may settle out .The oil is drawm from the
Service tankin use by pumps and discharged at low pressure to the fuel oil heater . these pumps should be in duplicate .A relief valve on the pumps
Will return excess to the system .A viscosity regulator is fitted at the heater discharge,through which the oil will pass.This automatically controls
The temperature of the oil fuel leaving the heater to maintain its viscosity within close limits . A by pass must be fitted to the viscosity regulator.
The oil is then discharged through a fine strainer to the main engine fuel pump suctions . Apressure control valve is fitted in the system and excess oil
Returned either to the heavy oil service tanks or to a balbncing tank.
A diesel fuel tanks is included in the system with its discharge to the primary pump suction ;through a change over vale.By operating this valve the engine may be operation on diesel oil. Change over
Should be very gradual to allow temperatures in the system to stabilize .During this period , the excess oil will return either to the heavy oil service tanks or abalncing tank . After it has been pumped from
The DO tanks,where it is stored , the diesel oil passes through a centrifuge for purification before entering the diesel oil tank .
(1)Where are self closing drain valves fitted ?
A.HO tanks
B.Heavy oil service tanks
C.Balancing tank
D.Centrifuge
(2)The word these in line 4 probably means _____.
A.HO tanks
B. A heater and a centrifuge
C. A heater and a cooler
D.Heavy oil service tanks
(3)Which of the following statements is true according to this passage?
A.Two heavy oil service tanks are used meanwhile
B.Heater mentioned in this passage is only used to heat heavy oil
C.Two pumps are fitted , which draw oil from the service tank in use
D.Diesel oil passes to the primary pump, and then througuh a change
over valve
(4)How is change over from heavy oil to diesel oil carried out?
A.Step by step
B.Hand over hand
C.Step for step
D.Quickly
第79题
The lowest temperature at which fuel combustion becomes self sustaining in the presence of a source of ignition ,is
Defined as the _____.
A.autoignition point
B.flash point
C.burning temperature
D.fire point
第32题
The compound wound generator has _____sets of field coil.
A.one
B.two
C.three
D.four
第48题
The officer in charge of the engineering watch shall ensure that all machinery involved with the
Maneuvering of the ship can be immediately be placed in manual mode of operation when notified the
Ship is_____.
A.at anchor
B.atunsheltered anchorage
C.in congested waters
D.in an open road stead
第47题
Thermocouple pyometers are used on large , main propulsion diesel engine to indicate the temperature
Of the ______.
A.cooling water leaving each cylinder
B.fuel oil entering the injector
C.eshaust gasea at various locations
D.lube oil at the bearing supplies
第46题
The Company should ensure that _____documents are promptly removed.
A.absolute
B.updated
C.outdated
D.new
第36题
For the fuel oil purifier ,a higher throughput and more efficient process can be achieved if the fuel is_____.
A.heated to reduce its viscosity
B.cooled to reduce its temperature
C.heated to reduce its density
D.heated to reduce its gravity
第37题
The average pressure exerted on a piston during each power stroke is termed_____.
A.indicated horsepower
B.mean effective pressure
C.exhaust back pressure
https://www.doczj.com/doc/d59932701.html,pression pressure
第38题
If an oil spill occurs on deck , you should____>
A.cover the area with foam
B.cover the area with absorbent material
C.wash down immediately with a fire hose.
D.Wash down immediately with an oil dispersing solvent
第39题
Reduced capacity,accompanied by vibration and noise at the suction of centrifugal pump is a result
Of_______.
A.cavitation
B.
C.water hammer
D.fluid friction
E.steam knock
第48题
Which of the following problems may be encountered by using an oil having a viscosity higher than that specified
For an operating hydraulic system?
A.External seal leaking
B.Hunting due to fast response
C.Hydraulic oil film breakdown
D.Increased power con sumption
第49题
————is not on the control panel of emergency generator
A.voltage transformer
B.current transformer
C.reverse power relay
D.voltage regulation device
第50题
Which of the following is NOT included in the thing to be done before bunkering?
A.plug all deck scuppers
B.Enter the information in the engine log and oil record book
C.Position no smoking sign
D.Record vessel draught and trim
第50题
THE block has spaces to accommodate ____drive arrangements ,a housing for the camshaft and doors allowing
Access to the ____
A.camshaft/crankcase
B.crankcase/camshaft
C.crankshaft/crankcase
D.crankcase/crankshaft
第52题
An increase in rotor clearances in a rotary pump will______
A.increase discharge pressure
B.decrease pump capacity
C.decrease pump cavitation
D.decrease reacting ring clearance
第53题
Which kind of the following controllers is the most sophisticated controller?
A.Proportional controller
B.Integral controller
C.Derivaive controller
D.PID controller
第54题
————are used to limit the pressure in any particular portion and mainly control the pressure after
The valve
A.relief valves
B.check valves
C.safety valvea
D.reducing valve
第55题
Unacceptably large quantities of impurities are left in the oil after the purifying process .Which
Cause is incorrect?
A.the oil is in sufficiently heated
B.the throughput is too high
C.the wrong type of gravity disc is fitted
D.the density of impurities is too large
第56题
The_____convention is first to establish basic requirements on training, certification and watch keeping
For seafarers on an internation level.
A.STCW78
B.STCW95
C.SOLAS74
D.SOLAS88
第57题
A manometer is used to measure_____.
A.pressure
B.temperature
C.volume
D.specific gravity
第58题
_____fuel oils ___lubricating oils require treatment before passing to the engine
A.both/and
B.neither/nor
C.either/or
D.both/or
第59题
The abbreviation ERM in the manila amendments to the STCW convention stands for____
.
A.engine room management
B.engine resources management
C.engineer resources management
D.engine room resources management
第60题
A combination combustible gas and oxygen indicator is an instrument that measures the____of both
Combustible gas and oxygen each is indicated on a separate meter
A.purities
https://www.doczj.com/doc/d59932701.html,binations
C.concentrations
D.filters
第61题
In order to reduce the chance of detentions ships should routinely verify following except for
_____.
A.all oil record book entries completed according to marpol
B.operation of the oily water separtor able to be demonstrated
C.operation of the oily water separation monitor able to be
demonstrated
D.cleaning all associated monitor,alarm and stopping device
第62题
Particulate matter is acomplex mixture of inorganic and organic compounds resulting from_____
Partly unburned lube oil, thermal splitting of HC from and lube oil ,ash in the fuel and lube oil,sulphate and
Water.
A.incomplete combustion
B.over combustion
C.purification
D.contamination
第64题
If sludge had packed between the bowl discs it may be necessary to stop the machine for____of the
Bowl.
A.self cleaning
B.manual cleaning
C.automatic cleaing
D.self or automatic cleaing
第65题
_____is used to drop and heave in the anchor through the hawse pipe the ancher chain is stored in
The chain locker
A.the windlass
B.the anchorwinch
C.the mooring winch
D.the anchor winch or windlass
第66题
When exercising port state control, all possible efforts should be made to____.
A.make up the loss due to the inspection
B.carry out a more detailed inspection
C.avoid ship being unduly detained or delayed
D.take measure as told by the PSCO
第68题
Rudder position is shown on the bridge by the _____.
A.rudder angle indicator
B.follow up gear
C.telemotor position
D.rapson slide indicator
E.
第69题
The figure that the volum of air atBDC,is divided by the volume of air at tdc is termed as_____.
A.ignition ratio
B.power ratio
https://www.doczj.com/doc/d59932701.html,pression ratio
D.injection ratio
第70题
______may be required ,where the ship is docked for hull coating
renewal . and for any other required
Underwater work to be carried out ,when the opportunity is to make
other reqairs.
A.voyage repairs
B.routine docking
C.damage reqairs
D.conversion
71.during the watch keeping at sea where situations occur in the machine space which may affect the speed manoeuvring ability power supply or other essentials for the safe operation of the ship _A_ should be informed as soon as possible
A the chief engineer
B the master
C the bridge
D the company superintendent
72.the speed of a radial piston hydraulic motor is controlled by varying the _A_
A amount of cylinder block offset with respect to the rotor
B fluid flow rate discharged to the motor
C length of the motor piston stroke on the power cycle
D pintle discharge rate to the suction side the pump
73 The diesel engine is similar to the gasoline engine in that _D_
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 functions is NOT one of the functions of air conditioner? B Arefreshing the air
B waking up
C adjusting the air humidity
D adjusting the air temperature
75prevention of air pollution form ships is _C_of MARPOL73/78 convention
A annex I
B annex III
C annex VI
D annex V
76 The electronic governor actuator is a _B_device which moves the fuel linkage in response to a signal from the digital controller
A mechanical
B hydraulic
C electric
D pneumatic
77 A circuit breaker and a fuse have a basic similarity in that they both _B_
Acan be reset to energize the circuit
B should open the circuit when overloaded
C will burn out when an over current flow develops
D should short the circuit when overloaded
78 power is supplied through _B_to larger auxiliaries at the __ voltage
A circuit breakers low
B circuit breakers high
C exciters low
D exciters high
79 the lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition is defined as the _B_
Aautoignition point
B flash point
C burning temperature
D fire point
80(关联题) During normal operation on heavy oil at sea, the oil is taken from the HO tanks, where it is stored. First, it is fed through a heater and next through a centrifuge for purification. It may then pass through a cooler, before being discharged to the steam-heated heavy oil service tanks. Two of these are usually fitted and they are used alternately. One tank is in use, while the other is being filled. These tanks are heated to a moderate temperature and self-closing drain valves are fitted to remove any water or sludge which may settle out. The oil is drawn from the service tank in use by
pumps and discharged at low pressure to the fuel oil heater. These pumps should be in duplicate. A relief valve on the pumps will return excess pressure to the system. A viscosity regulator is fitted at the heater discharge, through which the oil will pass. This automatically controls the temperature of the oil fuel leaving the heater to maintain its viscosity within close limits. A by-pass must be fitted to the viscosity regulator. The oil is then discharged through a fine strainer to the main engine fuel pump suctions. A pressure control valve is fitted in the system and excess oil returned either to the heavy oil service tanks or to a balancing tank. A diesel fuel tank is included in the system with its discharge to the primary pump suctions through a change-over valve. By operating this valve the engine may be operated on diesel oil. Change-over should be very gradual to allow temperatures in the system to stabilize. During this period, the excess oil will return either to the heavy oil service tanks or a balancing tank. After it has been pumped from the DO tanks, where it is stored, the diesel oil passes through a centrifuge for purification before entering the diesel oil tank
（1）where are self-closing drain valves fitted? B
A hd tanks
B heavy oil service tank
C balancing tank
Dcentrifuge
(2)The word ―these‖in line 4 probably m eans __.D
A.HO tanks
B.a heater and a centrifuge
C. a heater and a cooler
D heavy oil service tanks
(3)which of the following statements is true according to thispassage?
Atwo heavy oil service tanks are used meanwhile
B heater mentioned in this passage is only used to heat heavy oil
C two pumps are fitted which dram oil from the service tank in use
Ddiesel oil passes to the primary pump and then through a change-over valve
(4)How is change over from heavy oil carried out?
A.step by step
B.hand over hand
C.step for step
D.quicky
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
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 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