2009年第1期海船船员适任统考试题（总第47期）
一、单项选择题
1. The ____engine is used for alternators and some times for main propulsion with a gearbox provide a propeller of between 90 to 120 rpm.
A.four-stroke
B. Two-stroke
C. Slow speed
D.reversible
2.The abbreviation "MIP" stand for_____.
A. middle indicating pressure
B. mean indicated pressure
C. Mean indicated pitch
D. Middle indicated power
3.The cetane number of a diesel fuel oil indicates its_____.
A.V iscosity
B. Acid content
C. Heating value
D.ignition quality
4.In a two-stroke engine the camshaft rotates at____the engine rotational speed.
A.Half
B.twice
C. The same speed as
D. Four times
5.A diesel engine is similar to a gasoline engine except that the former has no_____.
A.Cross-head
B. Cylinder
C. Connecting rod
D.spark plug
6.It is easier to replace a dry cylinder liner than a wet one because______.
A.Of the thin wall thickness
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
7.A main bearing consists of two shells which are secured by means of studs and _____.
A.Tie rods
B. Through bolts
C. Lead wires
D. Bearing caps
8.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
9.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 valve is flushed clean during each injection
C.Prevent combustion gas blowback into the open needle valve
D.Prevent reflected pressure waves when the needle valve closes
10.In a diesel engine lube oil system, which of the following parts should be lubricated first?
A.Camshaft bearing
B. Main bearing
C. Piston crowns
D. Cylinder walls
11.In a diesel engine closed fresh water 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
12.which of the diesel engine component listed increases air density and helps to improve engine operating efficiency?
A.impeller
B. Air bottle
C. Air cooler
D. Exhaust diffuser
13. a large two-stroke/cycle direct reversing diesel engine is to be reversed. Prior to the admission of starting air you must______.
A. line up the engine for restarting with light diesel oil
B. Reposition the fuel injection cam
C. Change the intake and exhaust valve cam positions
D. Place the starting cam in the intermediate position
14.Which of the listed governor characteristics will greatly affect the load sharing
relationship between paralleled diesel generators?
A.Sensitivity
B. Power
C. Speed droop
D. Compensation
15.Thermocouple pyrometers are used on large, main propulsion diesel engines to
indicate the temperature of the ______.
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
16.After starting a diesel engine, which of the listed operating conditions should be
checked first?
A.Air box pressure
B. Lube oil pressure
C. Exhaust temperatures
D.raw
water pressure
17.To shut down a diesel engine after it exceeds the set maximum speed, which type of
device listed should be used ?
A.Speed limiting governor
B. Over-speed governor
C. Over-speed trip
D. Over-speed relay
18.The treatment of the fuel oils involves storage, heating, filtering and_____.
A.Centrifuging
B. Pressurizing
C. Atomization
D. Igniting
19.A propeller, in order to operate efficiently, must rotate at a relatively______speed.
A.High
B. Low
C. Fast
D.lowly
https://www.doczj.com/doc/8f8650408.html,tent heat changes the ___of water.
A.physical state
B. Temperature
C. Atmospheric pressure
D. Sensible
pressure
21.The primary function of a flame safeguard system, as used on an automatically fired
auxiliary boiler, is to prevent_____.
A.Accidental dry firing and overpressure
B. Uncontrolled fires in the furnace
C. Explosions in the boiler furnace
D. Overheating of the pressure parts
22.Improper maintenance of the fuel oil burners in an automatically fired auxiliary
boiler could result in_______.
A. increased fuel consumption
B. Increased feed-water consumption
C. Fuel pump failure
D. Combustion control system failure
23.Burner ignition failure in an automatically fired auxiliary boiler would be caused
by______.
A.A burned out solenoid in the oil supply valve
B. High temperature excess air
C. Incorrectly setting the hot-well dump valve
D. An incorrectly positioned burner
snubber relay
24.if the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler,
the cause may be______.
A.High steam pressure in the boiler
B. Abnormally high feed-water
temperature
C. Abnormally high boiler water temperature
D. Steam demand exceeding feed
pump capacity
25.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
26.A spur gear pump should be operated with the discharge valves______.
A.Slightly opened
B. Throttled
C. Fully opened
D. Halfway opened
27.An independent bilge suction is required for________.
A.Ballast tanks
B. Sludge tanks
C. Machinery space bilges
D. Cargo hold
bilges
28.To thoroughly pump out the bilges using a horizontally mounted centrifugal pump,
the _______.
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A. Pump must always be primed
B. V olute must impart a radial and rotary motion of the water
C. Suction side connection must guide the liquid to the lantern rings
D. Stuffing box should not be allowed any water leakage
29.An inadequate reciprocating bilge pump discharge is most often caused by______.
A.Defective safety valves
B. Clogged suction strainers
C. Scarred cylinder walls
D. Clogged drain valves
30.In a compression refrigeration plant, the hot, high pressure refrigerant gas is cooled by the sea water and becomes liquid in the______.
https://www.doczj.com/doc/8f8650408.html,pressor
B. Condenser
C. Throttle valve
D. Evaporator
31.The______only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.
A.Central air conditioning system
B. High velocity system
C. Low velocity system
D. Single duct system
32.The opening of the humidifier's valve of air-conditioner should be _____,when the circumstance temperature is raised to above 5~8℃in the winter.
A.Decreased
B. Increased
C. Fixed
D. Closed
33.Under normal conditions. The quantity of air circulation becomes less and less. What is the reason?
A.Dirty delivery ducts
B. Too much refrigerant
C. The fouling filters
D. High temperature outside
34.When bilge water is heated in a holding tank, which one of the following statement is not accurate?
A.The relative high temperature facilitates primary gravity separation
B.Most of the oil and organic solvents are raised to the top layer.
C.The relative high the temperature is, the more the top oil will be collected
D.The normal high temperature has little use on the separation of emulsified oil
35. If separating effect of the oily water separator is not good, we can improve it by_____.
A.Flushing separator with cold water
B. increasing bilge water supply flow
C. Heat oily water properly
D. Opening manual oil discharge valve
36.Which is the pollution prevention equipment?
A.Booster pump
B. Evaporator
C. Incinerator
D. Cooler
37.When does auxiliary burner of rotary nozzle type incinerator put into use? Ⅰ、when igniting Ⅱ、the waste oil for dealing with is too much Ⅲ、before stopping incinerator
A. Ⅰ+Ⅱ
B. Ⅰ+ Ⅲ
C. Ⅱ+ Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
38. when anaerobic bacteria convert the sewage to an inert sludge,______.
A. No oxygen is needed
B. Oxygen is necessary
C. Oxygen is given off
D. no gas is produced
39.For a I.O.purifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will______.
A.Be interrupted
B. Move downwards
C. Move outwards
D.retain original position
40.When separating the lube oil without additive, it is usually working with hot water; the aim is to remove _____from it .
A.Acid
B. Oil sludge
C. Mechanical impurity
D. Salinity
41.If the bowl of a disk type centrifugal purifier when operated as a separator is not primed the _____.
A.Oil has a tendency to emulsify in the bowl
B.Purifier will act as a clarifier at the discharge ring
C.Oil will be lost through the water discharge ports
D.Oil solids will be deposited only at the intermediate top disk
42.Tube leaks in the distillate cooler of a two stage flash evaporator will result
in______.
A.Loss of second stage vacuum
B. Contamination of the distillate
C. Lower feed mfet temperature
D. Contamination of the second stage
condenser
43.Small droplets of water entrained in the flashed vapor produced in a flash-type
evaporator, are removed by the ______.
A.Spray pipes
B. Demisters
C. Condensers
D. Splash baffles
44.Overflow valve usually be used to ______.
A.Control the fluid flow through it
B.Prevent the pressure before overflow valve over the specified value
C.Make the pressure after overflow valve steady
D.Control the direction of oil flow
45.Among the basic categories of equipment, which of the following are used to
convert mechanical into hydraulic energy?
A.The hydraulic pumps
B. V alves
C. Hydraulic cylinders
D.
Hydraulic motors
46.Cargo handling unit is rated according to the _____to be lifted.
A.Cargo crane
B. Jib
C. Safe working load
D. Oil pressure
47.The part of the anchor windlass that engages the anchor chain for lifting is called
the ______.
A.Warping head
B. Fair lead
C. Wildcat
D. Capstan
48.In automatic _____, the winch may be overhauled and wire is paid off the barrel at a
Pre-determined maximum tension.
A.Cranes
B. Windlass
C. Capstans
D. Mooring winches
49.The major source of chemical contaminants in hydraulic fluid is ______.
A.Microscopic steel shavings
B. Abrasive waste
C. Anti- oxidant compounds
D. Oxidation by-products
50.Before doing any work on a hydraulic system equipped with accumulators, you
should______.
A.Drain the accumulators and purge with oxygen
B.Bleed off all stored energy from the accumulators completely
C.Charge the accumulators to prevent system energy loss
D.Pump the hydraulic fluid into the accumulators to prevent fluid loss
51.One factor that determines the frequency of an altemator is the ______.
A.Number of turns of wire in the armature coil
B. Number of magnetic poles
C. Strength of the magnets used
D. Output voltage
52.The frequency output of an operating alternator is controlled b the _______.
A.Relative speed of the rotor poles
B. Number of turns of wire in the armature
coil
C. Strength of the magnets used
D. Output voltages
53.Prior to closing the breaker when paralleling two AC generators ,. The
recommended practice is to have the frequency of the incoming machine ______.
A.Slightly less than the line frequency
B. The same as the line frequency
C. Slightly greater than the line frequency
D. Have nothing to do with the line
frequency
54.If two A.C. Generators are to be operated in parallel, the load is distributed evenly
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by______.
A.Mens of rheostat
B. A balance coil
C. Adjusting the governor setting
D. Changing excitation
55.The first requirement for logical troubleshooting of ant system is the ability to ______.
A.Collect all available data on a casualty
B. Recognize normal operation
C. Identify the probable cause of a symptom
D. Isolate the faulty component
56.______is(are) not power supplied by main switchboard directly.
A.Steering gear and windlass
B. Navigation light and radio power panel
C. Navigation device power box
D. Daily fresh water pump
57.The emergency generator or emergency battery is connected to______on most large ships.
A.Distribution boards
B. Section boards
C. Emergency switch boards
D. Main switch boards
58.______connectors hold best if a wire is accidentally pulled or a connection becomes loose.
A.Ring type
B. Fork type
C. Spade type
D. "Push on, pull off" type
59.The primary function of an electric motor is to ______.
A.Develop torque
B. Generate high voltages
C. Produce a magnetic field
D. Generate high electrical resistance
60.puses placed in series with a thermal trip-type circuit breaker are used for ______.
A.Time-delay protection
B. Short-circuit protection
C. Short duration surge protection surge protection
D. Sustained overload protection
61.Shore power must be ______during dock repair.
A.Disconnected
B. Switched off
C. Cut off
D. Connected
62.The operator of electrical motors should keep a constant check on the loads they carry because __________.
A.Low loads necessitate frequent insulation cleaning
B.Exceeding nameplate values shortens useful life
C.Energy is wasted if full loading is not utilized
D.Power factor correction methods are load dependent
63.Before a marine diesel engine is started the cylinders and pistons must be ______.
A.Cooled to appropriate temperature
B.Warmed up gradually to appropriate temperature
C.Opened up and renewed
D.Ground and polished
64.______is a precaution which contributes to avoiding trouble under normal operating conditions.
A.Constant inspection
B. Keeping constant load
C. Remaining constant temperature
D. V arying speed
65.During ship manoeuvering , when the diesel is stopped, which of the following items is wrong?
A.Keep all systems running normally
B.Main engine is available at any moment
C.Shut off the starting air bottle outlet valve
D.Pay attention to the changes of the system parameters
66.A tank which has been sealed for a long period of time can be dangerous because _____.
A.Steel surfaces consume oxygen by rusting
B.Sealed tanks usually form a vacuum
C.Moisture condenses in the tank, displacing the oxygen
D.Most tank coatings give off poisonous vapors in the presence of moisture
67.The class of fire on which a blanketing effect is essential to extinguish the fire is
_______.
A.Class "A"
B. Class "B"
C. Class "C"
D. Class "D"
68.Fires in escaping flammable gas are quickly brought under control by_______.
A.Stopping the flow of gas
B. Reducing the chemical chain reaction
C. Increasing the oxygen supply
D. Cooling below the autoignition point
69.Which of the following statements is true concerning carbon dioxide when used as a
fire extinguishing a gent？
A.Carbon dioxide is corrosive when exposed to fire
B.Carbon dioxide should be applied slowly to a large engine room fire
C.Its total cooling effect is far greater than water
D.Its smothering effect is excellent for class B fires
70.While on watch in the engine room. Y ou hear a continuous sounding of the general
alarm. Which of the following actions should you take?
A.Make an entry en the official logbook
B.Open the master control valves on the fixed CO2 system.
C.Start the fire pump and check discharge pressure
D.Secure auxiliary condenser overboard discharge
71.To determine that a compartment contains sufficient oxygen to sustain life, you
should use a/an______.
A.Explosimeter
B. Oxygen indicator
C. Fresh air indicator
D. Emergency escape breathing devece
72.If the overflow tank high-level alarm sounds while the fuel oil tanks are being
topped off. The engineer should __________.
A.Close the static leg filling valve
B. Close the overflow tank filling valve
C. Reduce the fuel oil pumping rate
D. Stop the fuel oil pumping operation
73.The _______tools is used in precision work to smooth or enlarge a slightly
undersized hole.
A.Round out
B. Round file
C. Reamer
D. Hole driller
74.During the dock repair, each sea valve seat should be checked and ratified by
_____before reassembled.
A.Chief engineer
B. Surveyor
C. The engineer
D.the technique personnel of
the shipyard
75.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
76.The oil record book, as a part of the ship's official logbook, shall be kept on board
and preserved for a period of ______.
A. 3years after making the first entry
B. 2years after the last entry
C. 3months after last entry
D. 3years after the last entry
77.The valid period of the international oil pollution prevention certificate on board
isn't more than______.
A.One year
B. Two years
C. Four years
D. Five years
78.During the PSC inspection under the provisions of SOLAS 74. Which one may not
be regarded as clear grounds for ships' detainment?
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A. failure of the proper operation of emergency generator
B. Insulation of piping including exhaust pipes in engine room contaminated by oil
C. Improper operation of bilge pumping arrangements
D. Damaged sanitary pump
79."insufficiency of manning or insufficiency of certification of seafarers" is an identification of a _________.
A.Substandard ship
B. Standard ship
C. Over-standard ship
D. Reference ship
80.STCW 78/95 convention shall apply to seafarers_______on board seagoing ships entitled to fly the flag of a party.
A.Served
B. Serving
C. Surveyed
D. Surveying
81.All engineer officers and engine room ratings shall be aware of the serious effects of operational or accidental pollution of the marine environment and shall take all possible_____to prevent such pollution, particularly within the framework of relevant international and port regulations
82.When the order given by bridge may have bad results, the duty engineer should______.
https://www.doczj.com/doc/8f8650408.html,rm the captain for a further consideration
https://www.doczj.com/doc/8f8650408.html,rm the captain, and not perform it
C.Stop the M/B immediately, and then inform the chief engineer
D.Stop the M/B immediately, and then inform the captain
83.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
84.According to the international regulations concerning the prevention of pollution of sea areas from ships, the disposal into the sea of all plastics is _______.
A.Welcome
B. Admitted in some special sea areas
C. Prohibited
D. Acceptable
85.The main objective of the SOLAS convention is ______.
A.To provide a solution of lowering pollution at sea
B.To specify minimum standards for the members composing the watch at sea
C.To specify minimum standards for ships considering their safety
D.To tell the company how to go about running their business
86.Which of the following about ISM code is not right?
A.It aims to ensure safety at sea
B.It aims to avoid damage to the environment
C.It aims to prevent human injury or loss of life
D.If aims to provide a method to run a company
87.The ship security assessment is an essential and integral part of the process of developing and updating____________.
A.The ship security plan
B. The company security plan
C. The port security plan
D. The national security plan
88.In order to limit the introduction of alien species by ship, ______was adopted on 13 Feb,2004 at the IMO.
A.Revised Marpol annexⅠ
B. Revised marpol annexⅡ
C. International convention for the control and management of ships' ballast water and sediments
D. ISPS code
二、关联题（关联题题干下有4个小题，每小题4个选项）
第一组：
Stating Air System
The engine is started with compressed air of max 30bar. Minimum pressure required is 15bar. A pressure transmitter PT301 mounted on the starting air line before the main starting valve has an indicator in the instrument panel. The supply line from the staring air bottles is provided with a non return valve and a drain valve.
The solenoid valve is electrical(remote control) or manual (on the engine) operated and send after activation a pilot air signal to the main starting air valve. Interruption of the control air doses the main starting air valve. After the main starting air valve is activated the air flows through the flame arresters to the starting air valves in the cylinder heads.
The starting air distributor controls the timing of opening and closing of the starting air valves. On the moment the main staring air valve is operated also the governor booster is energized. The main starting air line is provided of a safety valve.
Interlock valve is a safety device to avoid an engine start with engaged turning gear.
89.As the engine is started with compressed air, the correct sequence of the following
devices being activated is______.1.solenoid valve 2. Starting air valve 3. Starting air distributor 4. Main starting air valve. https://www.doczj.com/doc/8f8650408.html,ernor booster
A. 1,5,4,2,3
B. 1,4,5,3,2
C. 1,4,3,2,5
D. 4,3,1,2,5
90.inderline sentence "the governor booster is energized" probably
means___________.
A.The governor booster is supplied with electric power
B.Hydraulic oil is pumped into the governor booster
C.The governor starts to work before starting the engine
D.The governor booster is supplied with pressurized air before starting the engine
91.Which of the following components are attached to the air bottles?
A.A pressure transmitter PT 301
B. A non-return valve and a drain valve
C. A solenoid valve
D. A starting air distributor
92.When the engine is engaged with turning gear, _______can keep the engine from
starting.
A.the control air
B. The solenoid valve
C. The main starting air valve
D.the
interlock valve
第二组：
（1）The company should establish procedures to ensure that the ship is maintained in conform the provisions of the relevant rules and regulations and with any additional requirements which established by the company.
（2）In meeting these requirements the company should ensure that:
(2.1) inspections are held at appropriate intervals
(2.2) any non-conformity is reported, with its possible cause, if known；
(2.3) appropriate corrective action is taken; and
(2.4) records of these activities are maintained.
(3)The company should establish procedures in its safety management system to
identify equipment and technical systems the sudden operational failure of which may result in hazardous situations. The safety management system should provide for specific measures aimed at promoting the reliability of arrangements and equipment or technical system that are nor in continuous use.
93.This passage concerns ______.
A.The inspections of the ship and equipment
B. The reports of non-conformities
C. The corrective actions
D. The maintenance of the ship and
4
equipment
94.In(2.4) of this passage,"these activities" refers to the following activities except_________.
A.The establishment of any additional requirement
B.The corrective action taken
C.The inspections held
D.The reporting of any non-conformity
95.According to this passage, some particular equipment should have specific measures to promote its reliability, because_______.
A.It is not in continuous use
B. Its sudden failure may result in hazardous situations
C. Its stand-by arrangements may not be regularly tested
D. It may not be identified by the company's safety management system
96.This passage is probably taken from___________.
A.The MARPOL convention
B. The STCW convention
C. The ISPS code
D. The ISM code
47轮机英语的答案
1- 5 ABDCD 6-10 CDAAB
11-15 BCBCC 16-20 BCABA
21-25 DAABC 26-30 CCABB
31-35 DDCDC 36-40 CBACA
41-45 CBBBC 46-50 CCDDB
51-55 BACCB 56-60 DCAAB
61-65 DBBAC 66-70 ABADC
71-75 BDCCC 76-80 DDDAB
81-88 CABCCDAC 89-96 BDBDDABD
5
47期轮机英语考试题目 一单项选择题 A1.The___ engine is used for alternators and some times for main propulsion provide a propeller of between 90 to 120 rpm. A.four-stroke B.two-stroke. C.slow speed D.reversible B2.The abbreviation”MIP”stands for____, A.middle indicating pressure B.mean indicated pressure C.mean pitch D.middle indicated power D3.The cetane number of a diesel fuel oil indicates its____. A.viscosity B.acid content C.heating value D.ignition quality C4.In a two-stroke engine the camshaft rotates at___the enging rotational speed. A.half B.twice C.the same speed as D.four times D5.A diesel enging is similar to a gasoline engine except that the former has no ____. A.cross-head B.cylinder C.connecting rod D.spark plug C6.It is easier to replace a dry cylinder liner than a wet one because____. A.of the thin wall thickedss B.honing makes it easier to maintain the desired oil film C.water seals are not required D.it fits more loosely due to a decrease in heat transfer through the composite wall D7.A main bearing consists of two shells which are secured by means of studs and____. A.tie rods B.though bolts C.lead wires D.bearing caps C8.However fast or slow the combustion rate,it is still a____between carbon,hydrogen,sulph and oxygen that releases heat. A.physical deformation B.state exchange C.chemical reaction D.coalescence A9.During the fuel injection period,fuel pressure must exceed cylinder gas pressure to____. A.ensure penetration and distribution of the fuel in the combustion chamber B.ensure the needle valves is flushed clean duringeach injection C.prevent combustion gas blowback into the open needle valve Dprevent reflected pressure waves when the neddle valve close. B10.In a diesel engine lube oil system ,which of the following parts should be lubricated first? A.Camshaft bearings B.Main bearings C.Piston crowns D.Cylinder walls B11.In a diesel engine closed freshwater cooling system,the amount of coolant flowing through the heat exchanger is controlled by the _____, A.suction pressure regulator B.thermostatic bypass valve C.sea water temperature D.water level in the expansion tank
中华人民共和国海事局 2009年第5期海船船员适任证书全国统考试题(总第48期) 科目：轮机英语试卷代号：803 适用对象：无限、近洋航区3000KW及以上船舶大管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至82题，每题1分，第83题至94题，每题1.5分。 一、单项选择题： 1. The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is . A. they operate between 150 and 450 rpm B. they are connected to the propeller by gearing C. their smaller size and weight D. they can be connected directly to the propeller without gearing 2. The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by . A. large conical springs B. compressed air pressure C. hydraulic pressure D. exhaust gas pressure 3. One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the . A. governor sensitivity B. exhaust temperature C. fuel injection pressure D. speed of the cam shaft 4. The desirable properties or a marine fuel oil should inc lude . A. high flash point and high viscosity B. low flash point and high viscosity C. low heating value and high sulphur content D. high heating value and low sulphur content 5. As the plunger moves upwards in the barrel, injection will commence once the plunger bas the spill ports and the pressure builds up. A. opened up B. closed off C. lined up D. taken off 6. In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces . A. all of the oil used by the engine through a filter B. some of the oil used by the engine through a filter C. some of the oil used by the engine through a centrifuge D. all of the oil used by the engine through a centrifuge 7. Because the circulating water is in a closed loop, is installed to cater for expansion and contraction of the water at different conditions of operation. A. an expansion joint B. a drain tank C. a head tank D. a contraction tank 8. The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the . A. inlet nozzle ring B. turbine wheel blade C. diffuser passages D. inlet volute 9. is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve. A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 10. Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as . A. actuation B. sensitivity C. compensation D. promptness 11. By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a . A. tachometer B. pyrometer C. dynamometer D. calorimeter 12. When the ship is going to enter into the harbor, ____. A. change from heavy fuel oil to diesel oil for main engine B. pumping out bilge water C. change sea chest from high level one to lower level one D. test emergency generator 13. If the jacket water temperature rises rapidly above normal in a diesel engine, you should first . A. place standby cooler in operation B. reduce engine toad C. check thermostatic valve D. clean sea water strainer 14. Air cocks, usually positioned at the in a circulating system, is used to get rid of the air in the system. A. bending joint B. expansion tank C. weld D. the highest point 15. Which of the following conditions could contribute to the cracking of a diesel engine cylinder head? A. Leaking seal ring B. Insufficient heat transfer from the exhaust valves C. Blocked cooling water passages to the head D. Excessive scavenging air provided to the engine 16. of an engine crankshaft can be detected by measuring deflections of' crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 17. can be a direct cause of faulty operation of diesel engine fuel injection nozzles. A. Excessive fuel nozzle holder cooling B. Sediment in the fuel supply C. Distortion of the fuel spray pattern D. Improper atomization of the fuel 18. When fuel is injected late into a diesel engine cylinder . A. the exhaust will be clear B. fuel consumption will be low C. all the fuel will be burned at top dead center D. fuel consumption will be high 19. A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result m the need to adjust the . A. pilot valve opening B. compensating needle valve C. compensating spring tension D. accumulator spring tension 20. Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system? A. Baffle plates that have been bent during prior removal. B. Leaks m the cooler tube nest. C. Operating the engine while maintaining a high sea water outlet temperature. D. A punctured sea water strainer supplying cooling water to the heat exchanger. 21. If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to the engine. A. stop B. start C. speed up D. slow down 22. In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?
中华人民共和国海事局 2006年第3期海船船员适任证书全国统考试题(总第41期) 科目：轮机英语试卷代号：805 适用对象：无限、近洋航区3000KW及以上船舶二/三管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。 一、单项选择题 1. A diesel engine is similar to a gasoline engine except that the former has no ______. A. cross-head B. spark plug C. connecting rod D. cylinder 2. A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ______. A. slow-speed diesel B. medium-speed diesel C. high-speed diesel D. constant-speed diesel 3.Which of the diesel engine components listed increases air density and helps to improve engine operating efficiency? A. Impeller B. Compressor C. After-cooler D. Exhaust diffuser 4.For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four- stroke/cycle diesel engine because ______. A. it has a longer power stroke B. more air gets into the cylinder each stroke C. it develops twice as many power strokes at the same speed D. higher combustion pressure is developed 5.The intake valves in a diesel engine are reseated by ______. A. cam followers B. push rods C. combustion gases D. valve springs 6.According to the way the energy of the exhaust gases is utilized, pressure-charging can be divided into two main systems, namely, the constant-pressure system and ______. A. the pulse-phase system B. the pulse Doppler system C. the pulse system D. the pulse interval system 7.An over-speed safety device is usually fitted to a generator engine for______in the event of over- speed. A. cutting power off the engine B. increasing the fuel pump setting C. braking the crankshaft D. stabilizing the ship speed 8.What preventative maintenance should be done frequently to diesel engine starting air receivers? A. Drain the accumulated moisture. B. Test the relief valves. C. Watch the temperature to prevent fluctuations in pressure. D. Clean the interior to remove oil and foreign matter. 9.Immediately after any diesel engine is started, the engineer should check the ______. A. crankcase pressure B. lube oil pressure C. seawater pressure D. exhaust temperature 10. A controllable pitch propeller on a diesel driven vessel eliminates the need for ______. A. friction clutches B. disconnect clutches C. reversing gears D. reduction gears 11.In motor ship, ______is often used to recover some of the heat carried in the exhaust gases from the main engine. A. an diesel oil heater B. a waste heat boiler C. a fresh water generator D. a donkey boiler 12.An exhaust gas bypass is installed on a waste heat boiler in order to ______. A. bypass exhaust gas at high loads to prevent excessive back pressure B. bypass a portion of the exhaust gas at peak loads for better efficiency C. recycle exhaust gas to the turbocharger D. minimize moisture condensation in the boiler gas passages at low loads 13.Prior to lighting off a cold automatically fired auxiliary boiler, you should ______. A. check and regulate the water level B. close the air cock once fires are lit C. blow down the gage glass D. assure protective steam flow 14.Flame failure in an automatically fired auxiliary boiler can mostly result from a/an ______. A. incorrect electrode setting B. incorrect nozzle position C. clogged fuel nozzle D. broken high tension lead 15.Waterside scale in a fire-tube boiler may cause ______. A. increased heat transfer B. fireside erosion C. high steam demand D. overheated tubes 16.Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? I. Its discharge is continuous; II. It has no internal valves; III. Upon accidental closing of discharge valve, excessive pressure will not build up A. I, II B. II, III C. I, II, III D. II only 17.Why are removable sleeves installed on centrifugal pump shafts? A. They make it easier to replace the pump shaft packing. B. They can be economically replaced as they wear out. C. They can be removed when it is necessary to lighten the weight of the pump. D. They increase the strength of the shaft. 18.If one of the bilge system manifold valves does not properly seat, the ______. A. bilge well connected to that valve, plus the second bilge well being pumped will be completely emptied B. bilge system will lose vacuum and prevent the other bilges from being pumped out C. bilge well aft connected to that valve will siphon(虹吸) its contents to the forward bilge wells D. discharge pressure will be too high. 19.Which of the listed statements is correct concerning the starting of centrifugal pumps? A. They should always be started with the discharge valve closed. B. They should always be started with the discharge valve opened. C. A priming pump is always required to flood the impeller suction. D. They should always be started with the sealing line valves closed. 20.The simplest method to use for determining if a centrifugal pump is operating as designed, is to ______. A. closely observe the pump discharge temperature B. close off the discharge valve, and watch for a rise in pressure C. momentarily close off the suction valve, and watch for a rise in pressure D. use a clamp on ammeter and compare the readings to past records
中华人民共和国海事局 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
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