轮机英语复习题Word文件下载.docx

1、6. Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? . reciprocating; . rotary; . centrifugal. A. only B. and C. , and D. and 7. A positive displacement pump is that where the volume of the pump chamber is alternately increased to _ and then decreas

2、ed to_. A. draw the liquid in/ force the liquid out B. force the liquid out/draw the liquid inC. suction/draw D. deliver/outlet8. Here some oil in the oily water separator, as a result of its lower _, will separate and riseinto the oil collection space. A. temperature B. viscosity C. density D. velo

3、city9. In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space. Whats the meaning of “it”in the sentence above? A. a separator B. oil C. water D. an oil collecting space10. _ are used

4、to ensure that ships dont discharge oil when pumping out oily water from any oil contaminated space. -印刷边界，请勿越界-出卷人： 出卷日期： 教研室主任： 教务科长： 印刷份数：A. Boiler B. Incinerator C. Oily water separator D. Sewage treatment unit11. In an oily water separator the oil will travel _ to the oil collecting spaces. A.

5、upwards B. downwards C. outwards D. forwards12. 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 waterC. by oily water D. by mixed water13. _ ar

6、e used for cargo handling. A. Cranes B. Mooring winches C. Windlasses D. Foreman14. _ are used to handle anchors and chains. A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches15. The drive motor will have a brake arranged to fail-safe, i. e. it will _ the load if power fails or machi

7、ne is stopped. A. lift B. put C. take D. hold16. _ are used for hauling in or letting out the wires which fasten the ship to the shore. 17. Cargo handling unit is rated according to the _ to be lifted. A. cargo crane B. jib C. safe working load D. oil pressure18. _ may be fitted for operating the de

8、rrick topping lift （the wire which adjusts the derrick height）. A. A capstan B. A hold C. A warp end D. A mooring drum19. In a compression refrigeration plant the refrigerant is under low pressure in the _ and under high pressure in the _.A compressor/condenser B condenser/evaporator C throttle valv

9、e/evaporator D evaporator/condenser 20. These include deck machinery such as mooring equipment, anchor handing equipment, cranes and _.A. boilers B. bow thrusters C. stabilizers D. hatch covers21. In a general cargo crane, three principal movements are _; _; _.A. hoisting/luffing/slewing B. lifting/

10、raising/loweringC. rotating/raising/handling D. hosting/lowering/moving22. Hydraulic cranes must be properly warmed-up before being operated because _.A. warm-up allows the hydraulic system to become charged with oilB. warm-up allows the relief valves to be properly testedC. hydraulic strainers oper

11、ate only during the warm-up periodD. hydraulic fluid must be at the proper viscosity23. _ is the production of pure water from sea water by evaporation and re-condensing. A Evaporation B Circulation C Condensation D Distillation24.When distilling sea water the cooling water discharging from the dist

12、iller is fed back to evaporator as feed water_.A to decrease scale formation B for better cooling effect C for more economic purpose D to raise vacuum 25. Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure, _ the saturation tem

13、perature. A the more B the higher C the lower D the highest 26. More than one stage of evaporation can take place by admitting the sea water into chambers with progressively _ pressure in the flash evaporator.A lower B higher C the lower D the higher 27. In a vacuum distillation system, the case is

14、the higher the pressure, _.A the saturation temperature is higher B the higher the saturation temperature C the higher is the saturation temperature D the saturation temperature is more high 28. When a flash-type evaporator is to be secured for an extended period of time, the entire unit should be d

15、rained, cleaned and _. A completely filled with saltwater B filled with de-scaling compound C tightly closed to exclude air D vented to the atmosphere 29. Which of the following statements is correct relative to distillation plant operation?A Distillation is the process of boiling seawater to produc

16、e vapor which is condensed into fresh water B Evaporation is the second part of the distillation process where brine is removed C Brine is the result of condensed sea water vapor D Distillate is the product resulting from the evaporation of fresh water vapor. 30. Compressed air is used on board ship

17、_.A for starting diesel engine B in pneumatic control system C in pneumatic tools D all the above are true.31. A knocking sound emitted from an unloaded air compressor is probably caused by _.A damaged intake valves B excessively tight mounting bolts C insufficient cylinder lubrication D a loose pis

18、ton 32. If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably_.A misalignment or worn main bearing B insufficient cylinder lubrication C defective or poorly fitted valves D all of the above 33. An un-loader is installed on an air compresso

19、r to _.A bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service B prevent excessive inter-stage pressure buildup C control compressor discharge pressure D remove all but the frictional load during starting 34. To obtain maximum efficiency, two stage air co

20、mpressors are usually _. A horizontally mounted B never fitted with intake filters C fitted with intercoolers D operated in an unloaded condition at all times 35. A knocking sound from one cylinder of an operating air compressor indicates _.A a defective or broken high pressure un-loader B a loose v

21、alve plate C excessively overload D no compression 36. If an air compressor is used to supply compressed air to outlets throughout the engine roomand on deck of a vessel , the system is known as the_.A combustion control air system B supply air system C ships service air system D low pressure deck a

22、ir system 37. If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the_.A control air system B forced draft air system C supply air system D ships service air system 38. Which of the following problem can

23、 result in below normal pressure in the intercooler of an operating low pressure air compressor?A Defective pressure pilot valve B Defective receiver relief valve C Leaking intake valves on the high pressure cylinder D Leaking discharge valves on the low pressure cylinder 39. Excessively low air pre

24、ssure occurring in the intercooler of a reciprocating air compressor is caused by _.A leaky discharge valves on the LP cylinder B leaky discharge valves on the HP cylinder C insufficient intercooler cooling D low ambient air pressure 40. In a compression refrigerant plant, the refrigerant flows from

25、 the expansion valve and through the _ where it absorbs heat from the space being cooled and becomes a gas or vapor. A compressor B condenser C throttle valve D evaporator 41. The boiling and condensation points of refrigerant mainly depend on the _ exerted upon it. A temperature B density C volume

26、D pressure 42. In a refrigeration system, the amount of refrigerant admitted to the evaporator is directly related to_.A the compressor discharge pressure B condenser cooling water temperature C the solenoid valve temperature D the superheat of the refrigerant in the tail coil 43. The heat used to c

27、hange a liquid to a vapor is called _.A latent heat of fusion B latent heat of vaporization C specific heat of vaporization D latent heat of the gas 44. Both the temperature and the pressure of the refrigerant are increased in the _.A compressor B condenser C evaporator D expansion valve 45. The compressor suction line conveys the refrigerant vapor form _ to _.A condenser/evaporator B evaporator/compressor C compressor/condenser D none of the above 46.The main steering gear must be able to steer the ship at maximum ahead service speed and be capable at this speed, and at the ships deepest