中级电工（Intermediate electrician）.docVIP

中级电工（Intermediate electrician） 1. (x) the direction of the voltage specifies that the low potential point points to the high potential point. 2. (x) the electrolytic capacitor has a positive negative electrode 3. (o) in the outside of the magnetic field, the magnetic force line is directed by N pole to the S pole; Within the magnetic field, the magnetic force line is directed by S to the N pole. 4. (o) the magnetic field intensity depends only on the size of the current and the geometry of the coil, which is not related to the magnetic medium, and the magnetic induction intensity is related to the magnetic conductivity. 5. (x) the voltage at both ends of the capacitor is 90 degrees ahead of the current. (o) a transformer is a stationary device that converts an alternating current into another alternating current. (x) diodes have one-way conductivity and are linear components. 8. (x) technical personnel take the electrical schematic diagram, and the installation of the wiring diagram is the most important. 9. The basic steps of (x) reading chart are: look at the pattern description, see the main circuit, and see the installation wiring. (x) the advantage of the button interlocking forward and reverse control circuit is that the operation is convenient and the disadvantage is that it is easy to generate two phase short circuit accidents. In the real work, the button is often used, and the double interlocking of the contactor is the control circuit. 11. (x) professional ethics has the characteristics of voluntariness. (x) there are too many professional ethics indoctrinated to corporate employees, making it easy for employees to be cautious. (o) successful people tend to have higher professional ethics. 14. (x) employees should try their best to highlight their individuality in the clothing in the professional communication activities. 15. Under the conditions of market economy, it is necessary to set up a career idea of how to learn more and more knowledge. (x) consis