第六章测试1.Which screw thread term is the nominal diameter?
A:Crest B:Minor diameter C:Major diameter D:Pitch diameter
答案:C
2.Which options belong to the five important screw thread elements?
A:Turning direction B:Thread number C:Major diameter, pitch diameter and minor diameter D:Pitch and lead E:Tread form 3.In the following options, are standard parts.
A:Gears B:Springs C:Keys D:Commonly used thread fasteners 4.Which option is the type symbol for pipe threads?
A:G B:Tr C:M D:Rc 5.
Which surface is working surface of square and rectangular key joint?
A:Side surface B:Upper surface C:Lower surface D:End surface
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