【单选题】【消耗次数:1】
轴承金属材料包括( )
青铜
轴承合金
以上为正确答案
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相关题目
【单选题】 轴承材料包括( )
①  金属材料
②  粉末冶金材料
③  以上为正确答案
【单选题】 ( )和轴承衬的材料统称为轴承材料。
①  轴颈
②  轴心
③  轴瓦
【判断题】 YG类硬质合金主要用于加工铸铁、有色金属及非金属材料。
①  正确
②  错误
【单选题】 轴承的组合的调整包括( )
①  轴系轴向位置的调整
②  轴承间隙的调整
③  以上为正确答案
【单选题】 金属材料的切削加工性能是指切削金属材料的()程度?
①  方便
②  塑性变形
③  硬化
④  难易
【单选题】 金属材料的切削加工性能是指切削金属材料的()程度。
①  方便
②  塑性变形
③  硬化
④  难易
【单选题】 下列轴承中必须成对使用的轴承是()。
①  深沟球轴承
②  圆锥滚子轴承
③  推力球轴承
④  圆柱滚子轴承
【单选题】 滑动轴承分为向心滑动轴承和( )。
①  滚动摩擦轴承
②  向心滑动轴承
③  整体式轴承
④  推力滑动轴承
【单选题】 为保证轴承正常工作,需满足的条件( )
①  要求轴承减摩性和耐磨性好
②  以上为正确答案
③  要求轴承材料有足够的强度和塑性
④  要求轴承耐蚀和抗胶合能力强
【判断题】 水泥属于无机非金属材料。
①  正确
②  错误
随机题目
【单选题】 9.“Has he seen this film?” “Yes. He _______ it several days ago.”
①  saw
②  has seen
③  had seen
④  was seeing
【单选题】 3.A hunter is a man who animals.
①  catch
②  catches
③  will catch
④  was catching
【单选题】 2.She the door before she goes away.
①  had locked
②  is locking
③  has locked
④  was locking
【单选题】 4.What if I drink this?
①  happens
②  is happening
③  will happen
④  is happened
【单选题】 10.Now Mike isn’t here. He _________ Mr. Green’s. Perhaps he _______ back in a few minutes.
①  went to; is coming
②  has gone to; will come
③  has been to ; will be
④  is going to; has come
【单选题】 6.Look out! That tree _______ fall down.
①  is going to
②  will be
③  shall
④  would
【单选题】 8.They can’t leave until they ______ their work.
①  did
②  are doing
③  have done
④  has done
【单选题】 1.When I saw Mary, she on the piano.
①  is playing
②  plays
③  was playing
④  played
【单选题】 7. My uncle __________ to see me. He’ll be there soon.
①  comes
②  is coming
③  had come
④  came
【单选题】 14.They ______ lunch at home every day.
①  have not
②  didnt have
③  dont have
④  have not any