接触网工技能判定温习题---中级工部分(国外英文资料).doc

接触网工技能鉴定复习题---中级工部分(国外英文资料) Catenary work skill appraisal review - intermediate part. Txt19 Ming can understand into two sitting in the sky, the moon mutual care, illuminate each other, be short of one cannot, the steady stream of light is the tie and bridge to connect each other! The long journey of the world is full of cold and lonely, the people who have no friends are the people in the darkness of life, and those who have no friends are real orphans. Contact web skills verification problem - intermediate work section The second part of the class 1, intermediate contact net work knowledge requires some practice problems (1) fill in the blanks (fill in the blanks with the correct answers) Example 1 any active two end network can be replaced by one. Answer: equivalent power supply. The device that determines the contact line is called a positioning device. Answer: flat position. The pressure on the soil under the unit area is called. Answer: the pressure of the soil. Example 4 bar insulator for the suspension part. Answer: stress and bending. Example 50 000 meters for the + pole: Answer: red. exercises 1. The force on the objects effect depends on the strength of the three elements, the change of any kind of elements, the effects of force on an object is. Force is a vector, and three elements of force are available. The reverse force of the soft body is the direction of the rope, and the object. The fixed end constraint is two components, one force and one. When the projection of a force is aligned to the coordinate axis, its projection is taken. The projection onto the axis of the coordinate axis is equal to the projection onto the axis. The torque is zero: (1) the force is zero; (2) when the force of action is passed. Torque is the moment when the object moves in a counterclockwise direction. The force of two forces that are of equal size, opposite, and function, ______. The third element of a couple is (1) the size of the force moment. (2) the couple; (3) the b