大管轮轮机英语综合(33-48期)(4)

大管轮轮机英语综合

C. In order to reduce moisture condensed. D. In order to increase the charge air density.

71. Which of the following may cause an explosion according to the passage?

A. Starting air cannot be supplied into the engine.

B. Air starting valve leaks and starting air is supplied into the engine. C. Cylinder-starting valves are properly maintained.

D. Oil discharged from compressors is kept to a minimum.

72. In order to avoid igniting the lubricating oil and leading to an explosion in the pipelines, ______.

A. pipelines should be regularly drained

B. cylinder-starting valves should be properly maintained

C. oil discharged from compressors should be kept to a minimum D. A+B+C

第二组：Maintenance and Overhauling

Satisfactory and proper operation of the engine depends not only on correct manoeuvring but also on how well it is kept in order. Regular maintenance of the engine helps a lot in preventing early wear of parts and in ensuring a long service as well as the working efficiency of the engine. With various types of engines, of course, the maintenance and overhaul is different. Instruction books are to be referred to whenever necessary.

The individual parts of the engine should be inspected and thoroughly cleaned at regular intervals. The periods for such overhaul work depend largely on the quality of the lubricating oil and fuel, on the load and on the efficiency of the operator in locating troubles and remedying them in time..

During overhaul the safety rules have to be observed as required in order to prevent the danger of accidents. Special precaution is necessary when the engine is running with the lagging removed. During overhauls with the engine shut down, safety measures should be taken to avoid undesirable turning of the crankshaft. All pipes should be pressure-relieved before the repair work is started. Read the pressure gauges and /or check the pipes by carefully loosening the screw plugs or connections.

If some parts of the running gear are dismantled, before using the turning gear, make sure that no loose parts are jammed in the crankcase where it is easy for them to cause damage. 73. According to the passage, which the following factors are involved to keep the engine

satisfactory and proper running?

A. correct manoeuvring B. keep the engine in order C. refer to the instruction books D. all of above

74. According to the passage, which the following items do influence the periods of the overhauling

work?

A. the quality of the lubricating oil B. the load of the engine

C. the efficiency of the operator in locating troubles and remedying them in time D. all of the above

75. According to the passage, we should take special precaution when ____.

A. the engine is running with the removal of lagging B. the engine is shut down

C. pipes are removed D. the screw plugs or connections are lossened 76. According to the passage, line 17 the bold and italic word “it” may propabably mean ____ .

A. running gear B. turning gear C. crankcase D. to cause damage

中华人民共和国海事局

2003年第3期海船船员适任证书全国统考试题(总第32期)

科目：轮机英语 试卷代号：803

适用对象：无限、近洋航区3000KW及以上船舶大管轮

（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）

答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔

涂黑。第1题至68题，每题1分，第69题至76题，每题1.5分,第77题至78题, 每题10分。

一、单项选择题：

69．The rate of pressure rise during the period following fuel ignition process in a diesel engine, is

influenced chiefly by the_______. A. percent of CO 2

B. range of inflammability C. theoretical fuel/air ratio

D. length of the ignition delay period

70．Which of the following would cause a diesel to have black smoke?

A. leaky injector. B. water in the gas. C. too heavy oil. D. water in the oil. 71．Before dismantling the pipe, would you _____the oil retained in the hose with _____?

A. flash/fresh air B. wash/fresh water C. flush/compressed air D. rush/diesel oil

72．Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means

of stopping the machinery from _______.

A. within the space concerned B. outside the space concerned C. the throttle station D. within the fire room

73．Cylinder oil is a high viscosity mineral oil, with a _____machined to the anticipated sulfur

content of the fuel.

A. TAN B. TBN C. SAN D. SBN

74．In a normally operating diesel engine, the main cause of lubricating oil contamination in the

crankcase is a result of the ______. A. metal particles loosened by wear B. air when no air cleaners are used C. condensation of water vapors

D. breakdown of the lubricating oil by dilution

75．The main engine is cooled with fresh water _____ is added suitable small quantities of chemicals

to prevent corrosion.

A. in which B. on which C. to which D. by which 76．As for a diesel engine,lack of combustion air may be due to______.

A. fouling turbine B. fuel pump faults C. lubrication failure D. excessive cooling 77．_____, remedies must be taken to stop it as early as possible.

A. Any surge occurs B. Any surge occurred

C. Should any surge occur D. Should any surge occurring

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