大管轮轮机英语综合(33-48期)(14)

大管轮轮机英语综合

B. maintaining the metering adjustment for a reasonable period under all load conditions C. timing fuel injection to obtain maximum power and good fuel economy

D. distributing the fuel to all parts of the combustion chamber for proper combustion

67. Administrations should bear in mind the significance（重要性） of ______in maintaining safety

of life and property at sea and in preventing marine pollution.

A. advanced nautical equipment B. advanced performance main engines C. emergency equipment D. communication and language skills

68. During inspection of the machinery space, which of the following statements points to an

unsatisfactory organization of the systematic maintenance? A. missing valve hand wheels B. dirty tank tops C. a large number of temporary repairs D. All of the above. 三、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 cylinder cover is made of cast iron and is provided with two inlet valves, two exhaust valves, a central mounted fuel injection valve and an indicator valve. The inlet valves are mounted with separate seating rings made of special heat-resistant cast iron. These rings are pressed into the cylinder cover in cooled conditions. The exhaust valve seatings are special, water-cooled seating rings. These rings are also pressed into the cylinder cover in cooled conditions.

Each cylinder cover is provided with cooling water from a screwed -on tubular cooling water

jacket through radial bores in the thick bottom of the cover. Each of the radial bores is connected to two side bores. The cover has further separate bores that lead to the cooling water jacket and the bores in the cylinder cover to a common outlet chamber. The cylinder cover and cylinder liner are assembled by means of four threaded studs screwed into the frame. Tightening is effected by means of hydraulic tools, and sealing by means of a thin ring mounted between the cylinder cover and the cylinder liner. A starting valve is mounted on the side of the cylinder cover.

The engine has oil-cooled pistons of cast iron. The pistons are provided with three compression

rings and a spring-loaded scraper ring. A space for cooling oil is provided at the top of the piston. The scraper ring prevents lubricating oil from being drawn up into the combustion chamber. Oil for cooling the piston crown is led from a bore in the crankshaft through a channel in the connecting rod and the connecting rod journal, to the bushing for the gudgeon pin. This bushing is provided with an annular groove from which part of the oil is led for lubricating the gudgeon pin. The remaining oil continues through bores in the gudgeon pin and the piston to piston cooling chamber.

69. This passage is mainly about ______.

A. cylinders and cylinder covers B. cylinders and pistons C. cylinder covers and pistons D. cylinders and oil

70. Which of the following may be provided on top of the cylinder cover?

A. two exhaust valves B. a starting valve C. an indicator D. all of the above 71. Which of the following is true?

A. The inlet valve seating rings are of heat-resistant cast steel.

B. There are six studs by which the cylinder cover and liner are tightened. C. The exhaust valve seatings are cooled by water.

D. A copper ring is mounted between the cylinder cover and the liner.

72. Which of the following is NOT true?

A. The pistons are cooled by oil. B. Four piston rings are fitted to each piston. C. The scraper ring scrapes the oil downwards. D. The piston cooling is of splash type. 第二组：

Beck Smith, a PSCO from Port Hamburger, is carrying out an inspection in the machinery space of M/V SUN. Here is a dialogue between the PSCO and the Chief engineer.

PSCO: Chief engineer, your escape route marked in arrows at stairs, or corridors to emergency exit should be clearly sighted in dark. These marks should be smeared in fluorescence（荧光） in order to evacuate when lighting is cut off.

Chief Engineer: OK, I will rectify this as quickly as possible. PSCO: One more, your pumping line may slightly leak oil Chief Engineer: No. Our pumping line has no trouble at all.

PSCO: Trust me. I have served Chief Engineer for many years. There is somewhere leaking oil. Chief Engineer: How do you know?

PSCO: Oil tank bottom is very clean but with oily brightness. Significantly, you prepared for PSC inspection for quite a long time. As leaking oil, you cleaned second time just now.

Chief Engineer: You are very smart! Yes, one small place leaked oil and I planned to fix it after PSC inspection because time is limited.

PSCO: Let me check the leaking oil place and assist you to find out a solution. Chief Engineer: Thanks.

PSCO: According to your record, you have used oily water separator to handle oily water. I found your inlet valve of the machine is dry and rusty. I suspected that your record is untrue. Where is your 50 tons oily water? Did you pump out in high seas? Chief Engineer: We pumped into another ship.

PSCO: What is the ship’s name/call sign or another identification? Chief Engineer: I forgot.

PSCO: You can’t tell the ship’s name, call sign. And 50 tons of oily water were missing. But your engine log book was recorded to pump out water with handling of oil purifier. Obviously, your record is not right. And you pump out oily water in high seas. In compliance with MARPOL 73/78 Convention you must pay a fine

73. What about the evacuation route in the engine room of M/V SUN?

A. There is no evacuation route in the engine room.

B. The escape route is not marked in arrows at stairs or corridors to emergency exit. C. The escape route can be clearly sighted in …… 此处隐藏：5457字，全部文档内容请下载后查看。喜欢就下载吧 ……