Note
1.Examination time: 120 minutes.
2. Please first fill in your name, pass number and the name of your organization in the marked cover of the test paper as required.
3. Please read carefully the requirements for answering the various questions and fill in your answers in the required places.
4. Don't scribble on the test paper and don't fill in irrelevant content in the marked seal area.
One, two, three, four, five Total Score Uniform Scorer Score
Score Scorer
I. Fill in the blanks (Questions 1 to 20. Please fill in the blanks of the questions with the correct answers. 1 point for each question, ***20 points.)
1. COMPUTERIZED NUMERICAL CONTROL is a system referred to as CNC.
2. SINUMERIk820S system is not a control system, designed for economic data machine tools
3. Distribution network three-phase voltage imbalance will make the frequency converter's input voltage and current waveforms occur
4. p>
4. In order to improve the anti-interference ability, AC power supply ground and ground can not be **** use.
5. Electric field shielding to solve the problem of distributed capacitance, ground to earth.
6. Electronic measuring device electrostatic shield must be shielded circuit with the zero signal phase connection.
7. Most of the control system with automatic control, automatic information processing, automatic correction, automatic detection
and other functions.
8. The main circuit capacitor of the inverter is mainly based on the rate of decline in capacitance to determine, if less than the initial value of the need to
replacement.
9. Mechatronics includes mechanical technology, computer and information processing technology, system technology, technology, sensing
and detection technology, servo drive technology.
10. Electrical control schematic design according to the main circuit - control circuit - - the overall check of the order. 11. Economic CNC machine tools are mainly used in the transformation of small and medium-sized and milling machine CNC transformation.
12. SIN840C can realize interpolation.
13. CSB is the abbreviation of CENTER SERVICE BOARD.
14. The SIN840C control system consists of the main body of the CNC unit, the spindle and the components.
15. There are four main types of machining operations on the machine's operating panel, namely JOG manual, TEACHIN instructional, MDA and
AUTOMATIC.
16. In an automatic control system, a system that can follow changes in input with a certain degree of accuracy is called a
servo system.
17. An inverting proportional amplifier has two inputs, one of which is a terminal indicating that the input is inverted with respect to the output, and the other
is an in-phase terminal indicating that the input signal is in-phase with respect to the output signal.
18. Lean production has the
characteristic of changing the mode of production from one process to the next.
19. It is a very important way and means to develop and improve the trainee's independent operating skills.
20. In order to improve the reliability of the operation of electrical equipment, will be closely connected with the grounding electrode is called the work of grounding. Score Scorer
Two, multiple-choice questions (Questions 21-30. Please choose a correct answer, the corresponding letter in parentheses in the question. Each question 2
points, ***20 points)
21. capacitor substitution, the capacitor ( ) must first meet the requirements.
A, capacitance B, withstand voltage C, current D, power
22. tester can provide three output formats: PROTEL file format, ( ) and index table format, according to the use of
the need to choose.
A, BMP format B, text format C, connection table format D, JGP format
23. Commonly used industrial control systems are usually divided into decentralized control systems, programmable controllers, STD bus industrial control
machines, ( ), modular control systems, intelligent regulation and control instruments.
A, 16-bit single-board computer B, industrial PC C, the main CPU D, 32-bit microcontroller
24. When the distribution transformer three-phase output voltage imbalance rate is greater than ( ) will have an adverse effect on the system.
A, ± 5% B, ± 3% C, 5% D, 3%
25. Inverter retrofit equipment speed control system to improve the performance of ( ), reducing power consumption.
A, speed B, accuracy C, anti-disturbance D, stability
26. PLC retrofit equipment control refers to the use of PLC programmable controllers to replace the original equipment control in the large and complex
( ) control device.
A, analog B, relay C, time real D, timing logic circuits
27. frequency converter to transform the equipment speed control system using AC frequency converter speed control to replace the original equipment in the ( ) or other motor regulation
3 speed program
A, variable pole speed control B. Variable voltage speed control C, DC speed control D, closed-loop negative feedback 28. transistor graphic meter measurement The spacing between families of characteristic curves can be changed when a transistor is measured by a transistor plotter ( ).
A, step selection B, power consumption resistance C, collector-base current/potential D, peak range
29. Repeated grounding serves to reduce the voltage to ground of the leakage equipment enclosure and to mitigate the dangers in the event of ( ) disconnection.
A, zero line B, protective earth line C, phase line D, phase and center line 30. leakage protection device in the human body touches the charged body, can cut off the power supply within ( ).
A. 10s B. 5s C. 1s D. 0.1s Score Scorer
Three, judgment questions (Questions 31 to 40. Please fill in the judgment results in parentheses, and fill in "√" for the correct one and "×" for the wrong one.
1 point for each question, ***10 points.)
( ) 31.SIN840C main menu of PROGEAMMING is edited on the hard disk of MMC. Edit by ASCII code. ( )32. The DIAGNOSIS diagnostic area is mainly used for machine tool adjustment and maintenance.
( ) 33. The A/D converter is an AC-DC converter.
( ) 34. There are master production planning (MP3). Material Requirements Planning (MRP). Production Schedule Planning (DS) Capacity Requirement Planning (CRP)
Constitutes Manufacturing Resource Planning MRP II.
( ) 35. ISO9000 family of standards in ISO9000-4 is the guiding standard.
( ) 36. the maintenance electrician team is mainly for production.
( )37. The general method of theoretical training is classroom lectures.
( )38. Instruction in operation is an extremely important method and means of developing and improving the independent skills of trainees.
( )39. It has been proved that low-frequency current is less harmful to the human body than high-frequency current.
( )40．Artificial respiration should be carried out when the electrocuted person has a heartbeat and is not breathing. Score Scorer
Four, short answer questions (Questions 41 to 44. 5 points per question, ***20 points.) 41. mapping generally include what steps.