技师考题（Technician Exam）.doc

技师考题（Technician Exam） Fill in the blanks (first to 20). Please fill in the blanks in the blanks with the correct answers. 0.5 points for each question, 10 points 1., in order to improve the utilization of power supply, the inductive load circuit should be connected in parallel with the appropriate (capacitor) to improve power factor. 2. an integrator circuit consisting of an operational amplifier, which acts like a low pass filter. 3. multi harmonic oscillator, also known as (non steady state) circuit. 4. binary number 1110 converted to decimal is 14. 5. oscilloscope horizontal scanning signal generator is (Ju Chibo). 6. thermal relay heating element setting current IFRN = (0.95--1.05) IMN. 7. rotating transformer is a signal component whose output voltage varies with the rotor (corner). 8. equipment for overhaul, when the pipe is re threading, (not allowed) wires have joints. 9., in accordance with the requirements of the process, in the electrical overhaul, first of all to cut off the total power supply, to do (preventive) safety measures. 10. general protection earthing resistance value is below (4 ohm). 11. fast thermocouple temperature measurement belongs to (dynamic temperature measurement). 12. logic operations, AAB = (A). 13. programmable controller input instructions, you can use the programmer to write the program, based on the (ladder diagram and instruction list). 14. the output of the frequency converter is not allowed to connect (contactor), nor is it allowed to connect the capacitor type single-phase motor. 15. CNC system operation is controlled by the object (servo drive device). 16. CNC device is the core of CNC system, and its components include CNC (software and hardware). 17. power field effect transistor features: (grid) the static resistance is high, the drive power is small, the removal of the grid signal can automatically shut down, and there is no two times breakdown, safe working area Wide range. 18., in order to improve the reliability of