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轮机英语试题十九

试题十九

一、单项选择题：

1.The lower section of a piston is called the ______.

A. land

B. skirt

C. crown

D. plate

2.Which cause of the following can lead to the engine not to start on air?

A. starting air pressure too high

B. correct timing of starting air valves

C. three of the starting valves stuck

D. the turning gear disengaged

3.Which of the following can be obtained by means of an indicator card?

A. the peak pressure in a cylinder.

B. the temperature of the cooling water.

C. the fuel consumption.

D. none of the above.

4.Expansion tank should be used to remove ______from cooling water.

A. scale

B. sludge

C. chemicals

D. air

5.Cracks in the cylinders and cylinder covers may result from ______.

A. low speed

B. unequal heating

C. less lubricating

D. low charge air pressure

6. A lube oil filter can be used to remove most contaminants from lube oil. A contaminant which

will remain in the lube oil after filtering is ______.

A. abravise

B. fuel oil

C. sediment

D. impurities

7. A ship designed for carrying goods requiring refrigeration is called_____.

A. REEFER

B. RO/RO SHIP

C. CONTAINER

TANKER

8.______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

9.______in what position the engine stops there will always be at least one of the cylinders with

its starting air valve open to admit compressed air to start the engine.

A. Because

B. Owing to

C. For

D. No matter

10.The pressurized air is usually cooled to increase the charge air ______.

A. viscosity

B. density

C. velocity

D. electricity

11.Load control on a diesel engine is accomplished by ______.

A. regulating the speed of the turbocharger

B. rotating the fuel injector pump plunger

C. regulating the speed of the fuel oil transfer pump

D. changing engine timing

12.When a vessel is in dry-dock, the vessel's engineers should ______.

A. examine the condition of the propeller

B. chip and paint all

hull protection zincs

C. install new docking plugs in all cofferdams(干隔舱)

D. inspect the hull for hogging or

sagging

13.The gear and screw pumps are classified as ______.

A. variable stroke pumps

B. multistage pumps

C. positive displacement pumps

D. triple-ported pumps

14.Centrifugal pumps, however, can be designed with a number of impellers______ to attain a

large amount of liquid.

A. in series

B. in parallel

C. assembled

D. together

15.The basic function of the centrifugal pump impeller is to ______.

A. directly increase the pressure of the liquid being pumped

B. directly increase the velocity of the liquid being pumped

C. convert the potential energy of the liquid to kinetic energy

D. separate air from the liquid being pumped

16.A non-return valve in the air delivery line near to the compressor must be ______type similar

to the compressor discharge valve.

A. the low inertia

B. the high inertia

C. the low velocity

D. the high velocity

17.The bilge system has been performing well; however, the aft starboard engine room bilge-well

suddenly fails to be pumped out. Which of the following should be done first to determine the cause?

A. Open the bilge pump for inspection.

B. Remove each of the manifold valves.

C. Remove only the manifold valve to the affected bilge-well.

D. Attempt to pump out another bilge well to determine if the entire system is affected.

18.Every liquid has a pressure at which will vaporize and this pressure varies with temperature.

The word “ which” means ______.

A. a liquid

B. a pressure

C. a temperature

D. none of the above

19.Excessive alkalinity of the water in an auxiliary boiler can cause ______.

A. caustic embrittlement（脆化）of the boiler metal

B. acidic corrosion of the boiler

metal

C. hard scale deposits on the boiler tubes

D. etching （腐蚀）of the heat

exchange surfaces

20.The purpose of the safety relief valves installed on an auxiliary boiler is to ______.

A.relieve excess fuel oil pressure during the “ off ” fire cycle

B. admit water to the dry pipe

C. throttle the forced draft fan output for proper combustion

D. reduce excess steam pressure in the boiler

21.Fusible plugs are installed in fire-tube boilers to ______.

A. provide a means of draining the boiler

B. warn the engineer of low water level

C. cool the crown sheet at high firing rates

D. open the burners' electrical firing circuits

22.In a purifier changing to a gravity disc with larger hole diameter will move the interface

towards the ______.

A. bowl periphery

B. bowl center

C. upper surface

D. lower surface

23.Preventive maintenance _____.

A. should not be carried out during the watches

B. can only be carried out in port

C. is a kind of maintenances carried out prior to the occurrence

D. is a kind of maintenances carried out after the occurrence

24.When started, a complete oily water separating unit is first filled ______. The oily water

mixture is then pumped through the inlet pipe into the coarse separating compartment.

A. with dirty water

B. with clean water

C. by oily water

D. by mixed water

25.Here some oil in the oily water separator, as a result of its lower ______,will separate and rise

into the oil collection space.

A. temperature

B. viscosity

C. density

D. velocity

26.Burning diesel oil should be treated as which class of fire?

A.Class ‘ A ’

B.Class ‘ B ’

C.Class ‘ C ’

D.Class ‘ D ’

27.If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be ______.

A. contaminated fluid

B. pitted thrust rings

C. worn pintle bearings

D. obstructed

suctions passage

28.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

29.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.

30.Because of the reduced ______in the vacuum boiling evaporator, some of the sea water boils

as it flows through the tubes.

A. temperature

B. water level

C. pressure

D. rate of flow

31.A dirty intercooler on the ship service air compressor will result in ______.

A. decreased compression ratio

B. higher than normal power consumption

C. un-loader malfunction

D. water in the lubricating oil

32.The ______stage air compressors are widely used on board the ship.

A. single

B. II

C. III

D. multiple

33.Sludge may form in the crankcase of an air conditioning compressor as a result of ______.

A. bubbling refrigerant

B. overheating and oxidation

C. lowered operating temperatures

D. reducing the cloud or flash point

34.Machinery operating features are designed to help conserve（保存）energy. Which of the

following results will not contribute to energy conservation?

A. Reduction of friction.

B. Insulation of hot surfaces.

C. Lubrication of moving parts.

D. Elevation (升高)of cooler outlet temperatures.

35.When adding oil to a refrigeration system, precautions must be taken to ensure that ______.

A. the compressor suction pressure is not too high

B. all air is purged from the pump and charging fittings

C. the high pressure cutout switch is held open to prevent accidental starting

D. the condenser is completely shutdown first

36.Air entering an air-cooled refrigeration system is indicated by ______.

A. frosting of the liquid line

B. higher than normal head pressure

C. a clear sight glass

D. abnormally cold reefer boxes

37.Which of the statements listed concerning heat transfer is correct?

A. Heat is always transferred at a constant rate.

B. Heat transfer rate increases as temperature difference increases.

C. The rate of heat transfer is not affected by temperature difference.

D. The high temperature region is known as a heat sink.

38.______is a machine by which electrical energy is transformed into mechanical energy.

A. An alternator

B. An electric motor

C. A diesel engine

D. A main

switchboard

39.Which of the following statements is true concerning all three-phase alternators?

A. Each has three separate but identical armature windings acted on by one system of rotating

magnets.

B. Each has one armature winding acted on by three identical but separate systems of rotating

magnets.

C. All three-phase alternators are designed to operate with a 0.8 leading power factor.

D. The three phases always provide power to the load through three sets of slip rings and

brushes.

40.Universal motors will operate on AC or DC current, and are generally found in ______.

A. portable tools

B. large pump motors

C. turbo electric main motors

D. forced

draft fans

41.Which of the following should be the FIRST step in removing a generator from parallel

operation?

A. Trip the generator off the switchboard.

B. Turn off all electrical equipment.

C. Remove the load from the 'off going' generator.

D. Increase the cycles of the generator staying on the line.

https://www.sodocs.net/doc/205360573.html,ually the panels are interlocked with ______so that the devices can be made dead before

the doors are opened.

A. protective earth

B. isolators

C. ground switch

D. circuit-breakers

43.The operating medium for control systems may be ______.

A. compressed air

B. hydraulic oil

C. electricity

D. all of the above

44.The most common type of containment device for spilled oil on the water is the use of ______.

A. straw

B. booms

C. skimmers

D. chemical dispersants

45.The ______is a crystal which, under pressure, produces an electric current which varies with

the pressure.

A. alternator

B. glass thermometer

C. burdon tube

D. piezoelectric（压电的）pressure transducer

46.In order to accurately measure very low pressures, which of the instruments listed should be

used?

A. Compound gage

B. Bourdon tube

C. Manometer

D. Deadweight gage

47.When the current flow through a copper wire increases, its ______.

A. resistance will decrease

B. insulation will burn

C. temperature will increase

D. conductivity will increase

48.The system will include various ______such as low tank level alarms and remote operation of

tank outlet valves in the events of a fire.

A. switches

B. panels

C. alarm units

D. safety devices

49.Electrically operated safety devices on auxiliary diesel engines function to stop the engine

by_____.

A. increasing the volume of intake air

B. shutting off the fuel supply

C. increasing the engine back pressure

D. over-speeding the engine

50.In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be

taken off and the piston should be______.

A. craned out

B. rolled out

C. lifted out

D. turned out

51.Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will______.

A. reduce engine horsepower output

B. aid in silencing the exhaust noise

C. increase the mean effective pressure

D. contribute to effective cylinder scavenging

52.Hearing a strong noise, ______at once.

A. the engine stopped

B. the engine was stopped

C. he stopped the engine

D. he had stopped the engine

53.Poor combustion in a diesel engine can be caused by______.

A. high compression pressure

B. low intake air temperature

C. low exhaust pressure

D. high scavenge air temperature

54.An automated diesel engine should normally shut down due to______.

A. low lube oil temperature

B. high ambient air temperature

C. low lube oil pressure

D. high exhaust system back pressure

55.Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits,

may cause______.

A. low compression pressure

B. increased piston wear

C. increased cylinder lube oil consumption

D. poor contact between compression rings and liner

56.During repair, lubrication lines and orifices must be______.

A. taken away

B. engaged

C. connected

D. sealed off

57.The bearing cap and shell are replaced and tightened up until______.

A.the “ nip” is zero

B.the “ nap” is zero

C.the “ gap” is correct

D.the “ clearance” is correct

58.A built-up exhaust valve is one in which______.

A. the stem and heads are made of different material

B. low-alloy steel is used throughout

C. a replaceable valve disk is welded to the head

D. the self-centering action comes from motion of the valve stem in the guide

59.A centrifugal pump can’t suppl y water after starting. You should check______.

A. discharge valve

B. power supply

C. packing gland

D. bearing lubrication

60.______, the engine must be stopped immediately.

A. Should knocking occur

B. If knocking occur

C. Should if knocking occurs

D. If occur knocking

61.Which of the motors for the devices listed below is fitted with an instantaneous overload relay?

A. Fan

B. Pump

C. Winch

D. Machine tool

62.Oil mist detectors are usually used on board to detect oil mist density within______.

A. the engine crankcase

B. the engine scavenge boxes

C. drain tanks

D. fuel tanks

63.The resistance of electric wire will decrease as its______.

A. length increases

B. cross-sectional area increases

C. temperature increases

D. percent of metallic purities increases

64.The______ is used to measure voltage.

A. ammeter

B. voltmeter

C. wattmeter

D. frequency meter

65.When the ship is in restricted visibility, the officer in charge of the engineering watch shall

ensure that______. I. bridge orders relating to changes in speed or direction of operation are immediately implemented. II. auxiliary machinery used for maneuvering is readily available.

III. permanent air or steam pressure is available for sound signals.

A. I+II

B. I+III

C. II+III

D. I+II+III

66.The value of GM still remains one meter, meanwhile we can pump the ballast water

to______the ship on even keel.

A. make

B. put

C. keep

D. get

67.Your ship’s certificates show that you did not do renewing work for certificate. All

certificates have expired a few days before. Thus, your ship is______. It follows therefore that she will______.

A. seaworthy / be fined in our port

B. un-seaworthy/ be disassembled in our

port

C. seaworthy / be assembled in our port

D. un-seaworthy / be detained in our port

68.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

69.A tank has been sealed and unventilated for a long period of time. Which of the following

conditions does this indicate?

A. The tank is safe to enter.

B. The tank is especially dangerous to enter.

C. Carbon monoxide is present.

D. Water vapor present when the tank was sealed has

oxidized.

70.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

B. combinations

C. concentrations

D. filters

71.When the general alarm is sounded continuously, the engine room personnel should______.

A. proceed to their man overboard stations

B. start the fire pump

C. put on lifejackets and go to their abandon ship stations

D. secure the propulsion diesel engines and evacuate the engine room

72.One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space

is______.

A.the ‘ snow ’ which is sometimes discha rged along with the gas is toxic

B. prolonged exposure to high concentrations of CO 2 gas causes suffocation

C. rapid dissipation of the CO 2 vapor

D. the CO 2 gas is lighter than air and a large amount is required to extinguish a fire near the

deck

73.The ______Convention is the first to establish basic requirements on training, certification

and watch-keeping for seafarers on an international level.

A. STCW78

B. STCW95

C. SOLAS74

D. SOLAS88

74.When viewed from astern, if the propeller revolves in a clockwise direction when going ahead,

it is known as______.

A. ahead direction

B. astern direction

C. right-handed

D. left-handed

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：Battery maintenance is substantially（充分的）the same for both types of battery. Cell tops must be kept The hoisting of the cargo is effected by a hoisting winch driven by a

hydraulic motor that provides a constant torque in both directions of rotation and at all speeds within the regulation range of the motor. The winch is equipped with a mechanical belt brake that acts on the outside of the rotating motor housing. During operation, the brake is released by means of oil pressure which compresses a spring. The crane jib is raised and lowered by means of a luffing winch is constructed in a similar manner to the hoisting winch.

The pumps are axial piston pumps and are driven by a common 3-phased asynchronous motor at a constant speed of rotation. The capacity of the pump is changed by turning the

swash-plate. The crane is turned by a hydraulic motor of the same type as that described

above, in that the rotor turns a pinion which engages with a toothed ring on the crane housing.

An oil cooler is used to remove the heat generated in the oil during the operation of the crane. The system is also provided with a pre-heater for heating the oil in cold weather. If the temperature of the oil reaches 85C, a thermostat in one of the oil lines switches off the electric motor.

Pressure relief valves are built into the system to protect the system and the crane against excessive loads. All moving parts in the hydraulic system are lubricated by means of the oil in the system..

The crane housing, which is a welded construction on a rigid base-plate, contains all the mechanical machinery, the hydraulic system and the electrical equipment. The top of the

crane housing and the jib carry blocks for wires for the hoisting of the cargo and the raising of the jib. All of the blocks have enclosed ball bearing.

75.Which of the following is true about the hoisting of the cargo?

A. an electric motor provides a constant torque.

B. an hoisting winch is used.

C. a mechanical brake acts on the hoisting cable.

D. All of the above are true.

76.The pumps _____.

A. are driven by variable speed electric motors

B. turn the crane

C. may deliver variable capacity by turning the swash plate

D. B and C are true

77.Which of the following is true about the oil in the system?

A. It can be cooled in a cooler.

B. Its temperature can exceed 85 degrees centigrade in no account.

C. It can be used to lubricate moving parts.

D. All of the above are true.

78.Which of the following is true?

A. The mechanical brake is released by means of a strong spring.

B. At least three hydraulic motors are fitted to the system.

C. The crane housing is of forged construction.

D. The blocks are installed on the base-plate.

三、中译英（共2题，请将答案写在答题纸上）

79.主机3、4和7号缸套吊出检查和测量。缸套水空间清洁，然后用新密封填料重新

装复。

80.

完整版五年级英语期末考试试卷及答案

紫云自治县2016—2017 学年度第一学期期末教学质量检测试卷（）13.—Do you often play football on the weekend? —________ 语五年级英 B. Yes, I do. C. No, I do. A. Yes, I am. 100分钟）100 分时间：（总分：）14. Where________the girl come from? （ A. are B. is C. does 题号一二三四五六七八九总分

（）15. ________nice camera it is! 分得A. What B. How C. What a 评卷人三、根据所给场景，选择合适的句子。(10 分) 分）一、找出下列单词中与众不同的一项。（10 （）16.当你想知道今天是星期几时，应问：C. hot B. sweet （）1.A. tea A. What day is it today? B. What do you have? C. It's Monday? （B. bike C. lake ）17.当你想知道别人会做什么事时，应问：（）2.A. river A. What do you do? ）（3.A. park B. old C. young B. What can you do? C. What are you do? （）18.当你想知道别人最喜欢的食物是什么时，应问：（）4. A. flower C. mountain B. tree

A. What's your favorite food? B. What 's your best like food? C. Sunday 5. A. Friday B. dirty （）C. What's your favorite fruit? 20 分）二、单项选择。（（）19.当你想感谢对方时，应说：________is your English teacher? （6. ）—A. You are welcome. B. I see. C. Thank you! Miss Liu. —（）20.当你问别人想喝什么时，你应说： C. Who B. Which A. What A. What do you like? B. What would you like to drink? 7. I________ a student. （）C. What's your like? C. is B. are A. am 四、从 B 栏中选出 A 栏的最佳答语。（10 分）8.

英语试题及答案

第五单元 Directions: In this section you'll hear some short conversations. Listen carefully and choose the best answer to the questions you hear. 1. A. She is upset with her daughter's school. B. She has nothing for her to do where she is. C. She is starting her own company. D. She has a new job. 2. A. He's too lazy. B. It's summertime. C. He can't see them. D. They look good. 3. A. She didn't want to answer while relaxing. B. She didn't notice that it was ringing. C. She didn't want to leave her bath. D. She was asleep at that time. 4. A. The man wants to marry the woman. B. The woman wants to marry the man. C. The man and woman are married. D. The man's mother wants the two to marry. 5. A. The woman is cleaning the home. B. The man is inviting the woman to stay. C. The man and woman live together. D. The man doesn't want the woman to move. 6. A. On the street. B. In the woman's home. C. With his mother. D. In his own place. 7. A. The man has a title he fought for. B. The man only had a couple of days to train. C. The man is a boxer with an upcoming fight. D. The man has trouble when he trains for fights. 8. A. The woman is talking on her mobile phone. B. The woman wants to bring home some milk. C. The man has picked up some bread.

八年级上期末英语试题8含答案

2019学年第一学期八年级学生学业水平测试英语本试卷共五大题，满分100分。考试时间90分钟。注意事项： 1．答题前，考生务必在答题卡上用黑色字迹的钢笔或签字笔填写学校、姓名、试室号和座位号；再用2B铅笔把对应该两号码的标号涂黑。 2．选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑；如需改动，用橡皮擦干净后，再选涂其他答案；不能答在试卷上。 3．非选择题答案必须写在答题卡各题目指定区域内的相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案，改动的答案也不能超出指定的区域；除作图可用2B 铅笔外，其他都必须用黑色字迹钢笔或签字笔作答。不准使用涂改液。不按以上要求作答的答案无效。4．考生必须保持答题卡的整洁。考试结束,将答题卡交回。一、单项选择（共10小题；每小题1分，满分10分）从1-10各题所给的A、B、C和D项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 1. Don’t worry. There is ________wrong with the computer. It’s only because of the power cut. A. something B. nothing C. anything D. everything 2. There are many famous pictures in the museum, ________the Mona Lisa. A. including B. included C. includes D. to include 3. We can ________ robots ________ help us do housework. A. use; for B. use; to C. used; for D. used; to 4. Ice Age V is one of ________ cartoons in 2016. A. more interested B．the most interested C. more interesting D．the most interesting 5. –I don’t like the white shirt. What about you, Simon? –I don’t like it, ________. I prefer the blue one. A. as well B. too C. also D. either 6. – Our country ________ a lot so far. –Yes. I am sure it will be ________ in the future. A. has changed; well B. changed; good C. has changed; better D. changed; better 7. It will be harmful to your hearing ________ you always listen to music by earphone (耳机). A. if B. so C. and D. but 8. To protect our eyes, we ________ keep enough distance from books when we read them. A. should to B. shouldn’t C. ought to D. ought not to 9. －All the workers went home yesterday ________ Mr. Smith. Why? －Because he was on duty. A. except B. except for C. besides D. beside 10. Tom will be ________. His parents are going to have a party for his ________ birthday. A. fourteen; fourteen B. fourteenth; fourteenth C. fourteen; fourteenth D. fourteenth; fourteen

第一学期期末考试英语试卷

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