轮机英语新版教材添加内容.docx

1、轮机英语新版教材添加内容A1When a ship in loaded condition floats at arbitrary water line, its displacement is _to the relevant mass of water displaced by the ship. A. equal B. larger C. smaller D. equivalentB2The displacement of a ship is _ to the total weight, all told, of the relevant loaded ship. A. larger B

2、. equal C. smaller D. equivalentB3. Which one is true? A. Two main areas of skill are involved in the construction of ship. B. There are distinct divisions in responsibilities between naval architects and marine engineers. C. Each ship will assume varying proportions according to its type. D. Ships

3、can be divided into different categories from different perspectives.D4. Why a gearbox is needed in a ship driven by a medium-speed diesel engine? A. To reduce the main engine speed. B. To increase the main engine speed. C. To govern the main engine speed. D. To fix the propeller shaft.B5. A propell

4、er, in order to operate efficiently, must rotate at a relatively _ speed. A. high B. low C. fast D. lowlyD6. Ina diesel engine, _ offers the heat energy directly; _ works as working medium and changes the heat energy to mechanical energy. A. the burning of the fuel; medium shaft B. fuel spray; fresh

5、 air C. fuel; fuel spray D. the burning of the fuel, the burned gas mixtureB7. In a diesel engine, _ works as working medium and changes the heat energy to mechanical energy, _ changes the reciprocating movement to rotary moment. A. fuel spray; the burning of the fuel B. the burned gas mixture; conn

6、ecting rod C. medium shaft; crankshaft D. the burned gas mixture; piston rodD8. One of the differences between a two-stroke engine and a four-stroke engine is, _. A. a two-stroke engine works without exhaust operation B. a two-stroke engine works without compression stroke C. a two-stroke engine wor

7、ks without expansion stroke D. a two-stroke engine works without suction operationD9. One of the differences between a two-stroke engine and a four-stroke engine is, _. A. a two-stroke engine cant work without cylinders B. a two-stroke engine cant work without piston C. a two-stroke engine cant work

8、 without crankshaft D. a two-stroke engine cant work without a blowerC10. In a diesel engine, with the fuel is injected into the cylinder, _. A. the piston is just coming upward from the bottom dead center. B. the piston has moved about one-fifth of the up. C. the piston has moved most of the way up

9、 and almost reached the TDC. D. the piston has just past the TDC.B11. _ is the main reason that reduces the power advantage of a two-stoke engine over a same size four-stroke one to about _. A. Inefficient scavenging; twice B. Inefficient scavenging; 1.8 times C. Fewer strokes in a circle; twice D.

10、Fewer strokes in a circle; 1.8 timesA12. If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap, i.e. when both valves are _, will be _, and the exhaust valve will close some 10 _ top dead canter. A. open; short; after B. clos

11、ed; short; after C. open; long; before D; closed; long; beforeA13. In a two-stroke engine, there are always a series of openings known as _, and in some circumstances, there are also openings known as _, in the part of the cylinder liner inside the scavenging air box. A. scavenging air ports; exhaus

12、t ports B. inlet ports; scavenging air ports; C. scavenging air ports; inlet ports D. exhaust ports; inlet potsA14. In some type of two-stroke engines, besides some small holes for _, starting valve, safety valve, indicator cock, and so on, there is a large central opening in each cylinder cover for

13、 mounting the _. A. fuel valves; exhaust valve B. exhaust valve; inlet valve C. fuel valves; inlet valve D. exhaust valve; fuel valveC15. In a two-stroke engine, the piston consists of a lower part, which in named as _ and usually made of _, and a upper part, which is referred to as _ and made of _.

14、 A. low-half, cast iron; top-half, heat-resistant steel B. low-half, aluminum; top-half, stainless steel C. piston skirt; cast iron; piston crown; heat-resistant steel D. piston skirt; aluminum; piston crown; stainless steelB16. In order to keep the oil film on the cylinder liner during the running-

15、in period, the piston ring are slightly rounded _. A. on both the external and internal top edges B. on both the external top and bottom edges C. on both the external and internal bottom edges D. on all the four edgesD17. In order to control thermal stresses, some types of modern engines use piston

16、with _. A. heavy wall and intensive cooling B. heavy wall and no cooling C. thin wall and no cooling D. thin wall and intensive coolingA18. In order to improve the working conditions of the crosshead bearing, the bearing pressure is made _ and the peripheral speed is made _ in later designs. A. smal

17、ler, higher B. higher, smaller C. smaller, smaller D. higher, higherB19. When the heavy fuel oil is heated to achieve the viscosity of 10-15 cSt, _ may occur. To avoid this, a _ system is used in most occasions. A. boiling and cavitations; low temperature B. boiling and cavitations; pressurized C. l

18、eaking and boiling; low temperature D. leaking and boiling; pressurizedD20. The fuel from the bunker tanks must be treated by _ before entering the service tanks, from where the fuel enters _. A. centrifugal separators; the engine cylinder B. oily water separators; the engine cylinder C. oily water

19、separators; the fuel supply system D. centrifuges; the fuel supply systemA21. A full-flow 50m filter is installed _, so the injection system components on the main engine are safeguarded. A. as close to the main engine as possible B. as close to the main pump as possible C. just before the fuel valv

20、e D. just before the booster pumpB22. The booster pump, which supplies diesel oil to _, should have a possibility of being powered by compressed air or by emergency power. A. the main engines B. the auxiliary engines C. the emergency generator engine D. the auxiliary engines and the main engine(s)D2

21、3. _is harmful for fuel pumps, fuel valves, cylinder liner, exhaust valve seats, and the turbocharger blades as well. A. Bed combustion of the fuel B. Bed atomization of the fuel C. Liquid contaminants D. Solid contaminantsB24. As an alternative to the conventional seawater cooling system, _ is base

22、d on _ principles about cooler locations, flow control and preheating, but with a central cooler and one additional set of pumps. A. the central cooling system, different B. the central cooling system, the same C. the opening cooling system, different D. the opening cooling system, the sameD25. An a

23、larm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that _. A. the expansion tank in lack of water B. the expansion tank is over flowing C. there is something wrong with cooling system D. there is something wrong with the engineD26. The _ cooling s

24、ystem needs least maintenance work for _ in this kind of system. A. open, the minimum components B. open, the high cooling efficiency C. central, there more coolers and a extra set of pumps D. central, there is only one component contacts seawaterB27. About the jacket water, that of the auxiliary en

25、gines usually is circulated by_ pumps,And the main engine usually_.A.an engine-driven, as wellB.an engine-driven, has an independent pumpC.an independent, ad wellD.an independent, has an engine-driven pumpB28.In order to maintain a constant outlet water temperature of 8085 from the engine ,a Three C

26、way valve is installed_.A.at the jacket cooler outlet to control the flux through the engineB.at the jacket cooler outlet to control the flux through the coolerC.at the engine outlet to control the flux through the engineD.at the engine inlet t to control the flux through the engineC29.In modern ins

27、tallations ,the main engine and the standby auxiliary engines_ A. can be started at low temperature and are free from preheating B .usually are preheated by steam before being started C. are kept at a constant temperature and free from preheating D .are kept at a low temperature to save engine C30.A

28、 marine diesel engine is started by_ A. supplying high pressure oil into a hydraulic motor B .supplying high temperature air into the cylinder C .supplying high pressure air into the cylinder D .electrical ignitingC31.The staring air system of an engine on board usually has interlocks in to _ A .ens

29、ure a successful shutting down at emergency conditions B .ensure a successful starting at emergency conditionsC .prevent the engine from starting at some abnormal condition sD .prevent the engine from starting at emergency condition sA32.In the starting system, the automatic valve is controlled by _

30、,and the cylinder start valves are controlled by_.A. pilot air; pilot air B. handle; solenoid C. handle, pilot air coming through the distributor D. solenoid; pilot air coming through the distributor B33.The starting air entering the cylinder begins when the piston _.A. has nearly come to TDC B. has

31、 just past the TDCC. has nearly come to BDC D. has just past the BDCC34. When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its_.A. suction stroke B. compression strokeC. power stroke D. exhaust stroke A35. When an engine is starting and has got a