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机械专业英语试题及答案(共11页).docx

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课程 机械工程专业英语
课lower pairs is their better ability to trap lubricant between their ______ surfaces.
A. enveloping B. mating C. outer D. outside
11. The word______ itself usually refers to the deterioration of metals and ceramics, while similar phenomena in plastics generally called ______.
A. recrystallization…. corrosion B. recrystallization…degradation
题 号








总 分
得 分
C. degradation…corrosion D. corrosion… degradation
12. Most frames _______ cast iron, weld steel, composition, or concrete.
A. are made from B. are made up of
C. was produced by D. was consist of
13. Rotating shafts particularly those that run at high speeds, must be designed to avoid operation
at speeds.
A . low B .overload C. critical D. hollow
14. Although cast iron is a fairly cheap material, each casting requires a .
A. pattern B. model C. mold D. patent
15. The term is used to describe joints with surface contact, as with a pin surrounded by a hole.
A. high pair B. low pair C. surface pair D. rotary pair
二、完型填空(在每个小题四个备选答案中选出一个正确答案,本大题共15小题,每小题1分,总计15分)
The term shaft usually refers to a relatively long member of round cross section that rotates and transmits power. One or more members such as gears, sprockets, pulleys, and cams are usually (16) to the shaft by means of pins, keys, splines, snap rings, and other devices. These latter members are among the “associated parts” considered in this text, as are couplings and universal joint, which serve to (17) the shaft to the source of power or load.
A shaft can have a noround cross section, ant it need not necessarily rotate. It can be stationary and serve to (18) a rotating member, such as the short shafts that support the nondri