轮机英语试题二十一
试题二十一
一、单项选择题：
1.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
2.______ pistons have low inertia and high coefficient of thermal expansion.
A. Cast iron
B. Cast steel
C. Forged steel
D. Aluminum
3.______ rods are not in the proper condition so that too much fuel is supplied to the
corresponding cylinder.
A. Piston
B. Sounding
C. Regulating
D. Connecting
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.______ 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.Impurities in the fuel oil will affect the operation of the engine, which has ______the use of
separator and some other devices.
A. brought about
B. caused for
C. resulted from
D. led
7.Diesel engine jacket water is used in the distillation process as the ______.
A. coolant for the distillate
B. coolant for the brine cooler
C. means of heating the feedwater
D. primary means of producing a vacuum within the distiller
8.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
9.Two-stroke engines invariably have ______ to admit air when uncovered by the descending
piston.
A. inlet ports
B. outlet ports
C. inlet valves
D. exhaust valves
10. A sealing arrangement is provided at ______ of the tail-shaft with the propeller and cone
completing the arrangement.
A. both ends
B. neither end
C. the outboard end
D. either end
11.Some vessels are equipped with a water lubricated stern tube. When at sea, operating under
normal conditions, the water service valve from the ship's saltwater system to the bearing should be______.
A. closed, and no leakage permitted across the shaft packing
B. closed, and only slight leakage permitted across the shaft packing
C. opened, and no leakage permitted across the shaft packing
D. opened, and only slight leakage permitted across the shaft packing
12.______ the repair in so short a time is unknown to us.
A. How they finished
B. How did they finished
C. That how they finished
D. That how did they finished
13.We should not start the engine unless the turning gear is ______.
A. on
B. disengaged
C. bolted
D. unscrewed
14.When a centrifuge is arranged to separate impurities and small amount of water from oil, it is
known as a ______.
A. purifier
B. separator
C. filter
D. clarifier
15.When a crankshaft ______ outside the engine, it should be carefully supported in a manner
which will avoid imposing high bending moments on it.
A. has to be handled
B. may be handled
C. has being handled
D. will be
handling
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.Concerning diesel propelled vessels, the astern power is to provide for continuous operation
astern ______.
A. equal to that available for ahead operation
B. at 70 percent of the ahead rpm at rated speed
C. while underway and under all normal conditions
D. at 70 percent of the ahead rpm of average continuous sea speed
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 pressure head of a water pump is given in the unit of ______.
A. kg
B. MPa
C. mH 2 O
D. none of the above
20.Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid
and ______.
A. fluid friction
B. fluid turbulence
C. component misalignment
D. pressure
surges
21.Some of the energy fed into the pump will be dissipated as______ due to mechanical
inefficiencies, the remainder will be converted into pressure rise and fluid velocity.
A. hydraulic head
B. static head
C. heat energy
D. steam
22.______ provides the head or pressure to supply the domestic water where required.
A. The compressed air
B. The compressing air
C. The transfer pump
D. The head
tank
23.Too much air in the furnace of an oil-fired boiler would be indicated by ______.
A. yellowish flame
B. golden yellow flame
C. white flame
D. brilliant white
flame
24.Fins are installed on the generating tube surfaces in waste heat boilers to ______.
A. prevent soot fires in the exhaust system
B. prevent exhaust gas erosion of the tubes
C. increase the velocity of exhaust gas flow
D. increase the rate of heat transfer
25.Proper filtering and straining of fuel oil is important because the ______.
A. fuel oil pump will over-speed if dirt is not removed
B. fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil
C. fuel injectors may be damaged by foreign particles in the fuel oil
D. dirty fuel will clog the intake air filter
26. A class ‘C ’fire would occur in ______.
A. bedding
B. pipe insulation
C. paint
D. a generator
27.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
28.The ______is used to treat bilge water.
A. oil centrifuge
B. oily water separator
C. incinerator
D. distiller
29.The core item in the Oil Record Book Part I is ______, 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 FROM FUEL
OIL
TANKS REFERRED TO UNDER SECTION(A)
C. Item C,DISPOSAL OF OIL RESIDUES(SLUDGE)
D. Item H,BUNKERING OF FUEL OIL
30.______ are used for cargo handling.
A. Cranes
B. Mooring winches
C. Windlasses
D. Foreman
31.In the design of hydraulic piping and equipment consideration is given to minimize
turbulence in the hydraulic fluid, as this will cause ______.
A. molecular fluid vibration
B. energy losses
C. wide pressure variations
D. mechanical damage to control valves
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.If a heavy sea strikes the ______, the shock is transmitted through the tiller to the rams.
A. propeller
B. rudder
C. bow thruster
D. stabiliser
34.With reference to rules governing steering gear, which one of the following rules is incorrect ?
A. It is required that all ships are provided with two independent steering gear systems that is
one
main and one auxiliary.
B. The auxiliary gear could be power operated in passenger ships.
C. The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigable
speed.
D. All moving parts of the steering gear must be guarded against any possible damage.
35.During an air compressor working, ______ should be drained .
A. the inter cooler
B. the cylinder
C. the outlet pipe
D. the inlet pipe
36.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.
37.The cooler as the liquid becomes, ______.
A. the faster it will evaporate
B. the slower it will condense
C. the slower it will evaporate
D. the faster it will flow
38. A dirty intercooler on an air compressor will cause ______.
A. damage to the un-loader operating diaphragm
B. an increase in current flow to the motor
C. high pressure in the receiver and filter
D. an excessive consumption of crankcase oil
39.If the capacity of the refrigeration compressor is too small the excess vapor will accumulate
in
the evaporator, causing the pressure to ______.
A. rise
B. fall
C. be maintained constant
D. None of
the above is true.
40.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
41.The fire-fighting practical training should take place in spaces which provide truly realistic
training conditions, and whenever possible and practical should be carried out in ______.
A. darkness
B. daylight
C. simulated engine-room
D. all of the above
42.If you must enter a room or compartment to combat the fire , keep an escape path ______.
A. open
B. close
C. opens
D. closes
43.The operation of paralleling two alternators requires the voltages to be ______ and also in
phase.
A. zero
B. eliminated
C. different
D. equal
44.The frequency of an alternator is controlled from the main switchboard by adjusting the
______.
A. frequency meter
B. voltage regulator
C. governor control
D. sychroscope
switch
45.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
46.Electrical supply is always needed even if only for lighting. So after a ship goes into service
it is extremely rare for the main bus-bars to be dead, it therefore follows that the bus-bars are continuously alive ______ the life of the ship .
A. along
B. will
C. throughout
D. for
47.The operating medium for control systems may be ______.
A. compressed air
B. hydraulic oil
C. electricity
D. all of the above
48.The viscosity regulator controls the fuel oil temperature ______ provide oil at the correct
viscosity for combustion.
A. in order that
B. because of
C. in order to
D. owing to
49. A transformer in an electric circuit serves to ______.
A. generate its own electrical power
B. transform electrical energy into mechanical energy
C. increase or decrease circuit voltage as required
D. convert A.C current to D.C current
50.Engine protection by means of an alarm or shutdown control can be obtained with devices
that are sensitive to _____________.
A. temperature
B. pressure
C. engine speed
D. all of the
above
51.The function of a rectifier is similar to that of a ______.
A. trap
B. regulating valve
C. check valve
D. filter
52.Control of the main propulsion diesel engines can be shifted to the wheelhouse from the
______.
A. wheelhouse control station
B. engine room control station
C. captain's office
D. chief engineer's office
53.______ means the Government of the State whose flag the ship is entitled to fly.
A. Assembly
B. Organization
C. Company
D. Administration
54.The officer in charge of the engineering ______ the watch to the relieving officer if there is
reason to believe that the latter is obviously not capable of carrying out the watch-keeping duties effectively.
A. shall take over
B. shall not take over
C. shall hand over
D. shall not hand
over
55.“Movement of engine no longer required.”means “______”.
A. Stop Engine
B. No Engine Revolution
C. Stand-by Engine
D. Finished With Engine
56.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
57.The stability of a vessel is normally the greatest when all fuel and water tanks are full
because the______.
A. center of gravity is lowered
B. center of buoyancy is lowered
C. reserve buoyancy is unchanged
D. hull freeboard is increased
58.While loading bulk oil, you notice oil on the water near the barge. Which of the following
actions should you carry out FIRST?
A. Search the vessel for leaks
B. Notify terminal superintendent
C. Stop loading
D. Notify the Coast Guard
59.An oceangoing ship of 400 gross tons and above must be fitted with a standard discharge
shore connection. What is the size of the bolt circle diameter of the shore connection required to transfer oily ballast to a shore side reception facility?
A. 125 mm
B. 183 mm
C. 215 mm
D. It depends on outside pipe
diameter.
60.The fire drill must, as far as practicable, be conducted as if _____.
A. there is a minor emergency
B. there is an actual emergency
C. there were a minor emergency
D. there were an actual emergency
61.The usual method of effectively applying foam on a fire is by _____.
A. spraying directly on the base of the fire
B. flowing the foam down a vertical surface
C. sweeping the fire before you with the foam
D. spraying directly on the surface of the fire
62. A _____,sometimes called filters, is a device designed to prevent the passage of unwanted
solids into the system.
A. steam trap
B. check valve
C. separator
D. strainer
63.In cleaning up an oil spill, the use of chemical agents would ______.
A. absorb the oil for easy removal
B. remove the oil from the water
C. disperse or dissolve the oil in the water
D. not affect the oil
64.When approaching a fire from winward, you should shield firefighters from the fire by using
______.
A. low-velocity fog
B. high-velocity fog
C. a straight stream of water
D. foam spray
65.In a diesel engine, an extremely leaking exhaust valve can cause ______.
A. misfiring
B. pre-ignition
C. interrupted scavenging
D. reduced
scavenging
66.With regard to a diesel engine crankcase explosion, the most violent is the ______.
I. primary explosion II. secondary explosion
A. I only
B. II only
C. both I and II
D. neither I or II
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 minimum number and capacity of bilge pumps and fire pumps and their dispersement
within the ship is governed by______.
A. Classification Society Rules
B. National requirements
C. The IMO International Convention for the Safety of Life at Sea
D. All of the above.
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：
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.
69.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
70.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
71.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
72.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
第二组：
At appropriate intervals inspection should be made of the main propulsion plant, auxiliary machinery and steering gear spaces. Any routine adjustments may then be made and malfunctions or breakdowns can be noted, reported and corrected. During these tours of inspection bilge level should be noted, piping and systems observed for leaks, and local indication instruments also be observed.
Bridge orders must be promptly carried out and a record of any required changes in speed and direction should be kept. When under standby or maneuvering conditions with the machinery being manually operated the control unit or console should be continuously manned.
Certain watchkeeping duties will be necessary for the continuous operation of equipment or plant-the transferring of fuel for instance. In addition to these regular tasks other repair or maintenance tasks may be required of the watchkeeping personnel. However no tasks should be undertaken which will interfere with the supervisory duties relating to the main machinery and associated equipment.
During the watch a log or record will be taken of the various parameters of main and auxiliary equipment. Fuel consumption figures are used to determine the efficiency of operation, in addition to providing a check on the available bunker quantities. Lubrication oil tank levels to some extent indicates engine oil consumption. If the sump level were to rise this would indicate water leakage into the oil and an investigation into the cause must be made. The engine exhaust temperature reading should all be about the same to indicate an equal power production from each cylinder. The various temperature and pressure values for the cooling water and lubrication oil should be at, or near to, the manufacturer’s designed values for the particular speed or fuel lever settings.
(The following questions are based on the passage above)
73.The first paragraph mainly about ______.
A. what should be done during the watch
B. what should be done during tours of inspection
C. what the duty personnel should do when they begin their watch
D. all of the above
74.The watchkeeping personnel ______.
A. should note bilge level
B. should observe piping for leaks
C. should undertake required tasks not affecting their supervisory duties
D. All of the above are true
75.Fuel consumption figures are used to ______.
A. determine the efficiency of operation
B. provide a check on the available bunker quantities
C. Both A and B are true
D. Neither A nor B is true
76.The fourth paragraph is mainly about ______.
A. why certain parameters should be recorded
B. where to get these readings
C. the purpose to log the sump level
D. all of the above
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。
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
小学六年级英语试题
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