中华人民共和国海事局
2007年第2期海船船员适任证书全国统考试题(总第43期)
科目：轮机英语 试卷代号：805
适用对象：无限、近洋航区3000KWaggressively及以上船舶二/三管轮
（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74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。
一、 单项选择题
1. ______ the engines, the diel engine is ______ ud engine on board.
弗里特A. Between/more commonly B. Among/the most commonly
C. Between/not more commonly D. Among/ not the most commonly
2. The average pressure exerted on a piston during each power stroke is termed ______.
A. indicated horpower B. mean effective pressure
C. exhaust back pressure D. compression pressure
3. 美发学校学费The cetane number rates fuels for diel engines according to its ______.
A. antiknock characteristics B. ignition qualities
C. rates of vaporization D. viscosity
数学专业排名4. The time between injection and ignition of the fuel is known as ______.
A. turbulence lag B. after burning ratio
C. pre-ignition lag D. ignition delay
5. ______ controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion.
A. The viscosity regulator B. The temperature controller
C. The flow meter D. The pressure switch
6. Constant cooling the various components of diel engine has a number of functions except for ______.
A.dream you to life good lubrication B. low thermal stress
C. good mechanical properties D. acid corrosion
7. A device which functions to bring a diel engine to a full stop to protect it from damage is known as a/an ______.
A. torque limiter B. over-speed trip
美剧scandalC. over-speed governor D. load limit governor
8. Engine speeds at which resonance can occur are termed ______.
A. maximum speeds B. full speeds C. a speeds D. critical speeds
9. Prolonged operation of a diel engine with a clod cooling water system at lower than normal designed operating temperatures can ______.
A. increa power output B. decrea lube oil viscosity
C. eliminate fuel knock D. cau sulfuric acid formation
10. ______ on a ship transmits power from the engine to the propeller.
A. The automatic control system B. The speed regularly system
英语学习的电影C. The transmission system D. The compression air system
11. In a _____ boiler the hot gas from the furnace pass through the tubes while the water is on the outside.
A. water-tube B. fire-tube C. exhaust gas D. composite
12. The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ______.
A.salinity is abnormally B.high steam demand is too high
C.feed-water flow is low D.water level is abnormally low
13. The water in a steaming auxiliary boiler should be tested daily for ______.
A. dissolved oxygen B. chlorides C. sludge D. dissolved nitrogen
14. Ignition failure in an automatically controlled auxiliary boiler could be caud by ____
__.
A. carbon deposits on the flame scanner B. high fuel oil temperature
C. low fuel oil viscosity D. high steam pressure
15. 从此以后英语The concentration of total dissolved solids in the water of an auxiliary boiler can increa as a result of ______.
A. awater contamination B. frequent surface blows
C. dissolved oxygen de-aeration D. frequent bottom blows
16. Some pumps u packing as aling gland. The gland should be ______.
A. slack enough to allow slight leakage of fluid B. slightly chocked
C. brought up tight so as not to allow any leakage D. fitted with a relief valve
17. A spur gear pump should be operated with the discharge valves ______.
A. slightly opened B. throttled C. fully opened D. halfway opened
18. Compared to globe and angle valves, gate valves ______.
A. are more suitable for throttling
B. operate with little or no pressure drop when fully opened
C. are more easily repaired
D. cannot be ud for rvice requiring infrequent operation
19. alternatelyAn increa in rotor clearances in a rotary pump will ______.
负责人翻译A. increa discharge pressure B. decrea pump capacity
C. decrea pump cavitation D. decrea reaction ring clearance
