皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
【题一】 某火力发电厂烟气脱硫工程,脱水楼主要是对烟气脱产生的石膏进行脱水,石膏经真空皮带脱水机脱水后,再由输送带传送至石膏仓库。脱水楼主要设备是真空皮带脱水机、石膏传送带。真空皮带脱水机主要靠皮带传动,皮带下方有成排辊轴,辊轴之间由齿轮进行传动,辊轴与机架之间安装滚动轴承,真空皮带脱水机动力由电机提供,为保持匀速运动,与辊轴采用链条传动。真空管道和石灰石浆液管道上安装气动阀门,由气压传动控制阀门的启闭。真空管道由真空泵提供动力,石灰石浆液由石灰石浆液泵提供动力,安装时施工单位对水泵联轴器进行同心度的对中,保证了安装精度。输送带的动力由电机带动,由皮带进行带动辊轴,辊轴滚动带动输送带的运输。 以上背景材料中未涉及的传动方式是( )。 A.齿轮传动 B.带传动 C.蜗轮传动 D.链传动 不属于齿轮传动的优点的是( )。A.传动比大 B.工作性能可靠,使用寿命长 C.可实现平等轴、任意角相交轴和任意角交错轴之间的传动 D.适用的圆周速度和功率范围广 石灰石浆液泵联轴器,主要作用是( )。A.水泵与电机轴之间的联结,使其一起回转并传递转矩和运动 B.为支承轴及轴上零件.承受其荷载,交保持轴的旋转精度,减少轴与支承的摩擦和磨损 C.水泵轴和电机轴之间的固定以传递扭矩 D.支承回转零件和传递运动和动力 真空皮带脱水机轴承为了降低摩擦、减少磨损,可采取哪项措施( )。A.密封圈 B.油环润滑 C.机械密封 D.填料密封 不属于带传动的优点的是( )。A.适用于两轴中心距较大的传动 B.带具有良好的挠性,可缓和冲击,吸收振动 C.结构简单,成本低廉 D.效率较高
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】—Where is Ms Li? —She London.
A.
went to
B.
has went to
C.
has gone to
D.
has been to
【单选题】The room ______ empty because there has been no lightin it at night for a long time.
A.
should 
B.
must    
C.
wouldn’t 
D.
can’t
【单选题】— By the way, where is Li Lei? — He ___ the bookstore. [     ]
A.
has been
B.
has been to
C.
has gone
D.
has gone to
【单选题】— By the way, where is Li Lei? — He ______ his library. [     ]
A.
has been
B.
has been to
C.
has gone
D.
has gone to
【单选题】The self-management factor consists of four behavioral dimensions. Which of the following was not one of the four dimensions? ( )
A.
Ethics and integrity
B.
Time management
C.
Developing others
D.
Flexibility and adaptability
E.
Self development
【判断题】The future management trends are empowerment self-managed teams. So the top managers are not as important as middle management as middle management has more contacts with the employees.
A.
正确
B.
错误
【简答题】听对话和短文,选择正确答案。 1. Where has Mr. Li been? [     ] A: He has been to Singapore. B: He has been to Korea. C: He has been to Japan. 2. How long has Mr. Li been away? [     ] A: Three months. B: Two months...
【简答题】 6. 维持体内环境相对稳定的免疫功能是
【简答题】维持体内环境相对稳定的免疫功能是
【单选题】—Is Miss Li in the office? —No, she ______ the classroom. [     ]
A.
has gone to
B.
has gone
C.
has been to
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题