Fill in the blanks with the correct answers: 1. COMPUTERIZED NUMERICAL CONTROL is a kind of (computer numerical control) system, commonly referred to as CNC. 2. The SINUMERIK 820S system is a (stepper motor) control system designed for economical CNC machine tools. 3. Three-phase voltage imbalance in the distribution network causes distortion in the input voltage and current waveforms of the inverter. 4. To improve anti-interference ability, the AC power ground wire and the (signal ground wire) should not be shared. 5. The electric field shielding solves the problem of distributed capacitance, and the (shielded) ground wire is connected to the earth. 6. The electrostatic shield of an electronic measuring device must be connected to the zero signal (potential common line) of the shielded circuit. 7. Most control systems have automatic functions such as control, (automatic diagnosis), information processing, correction, and detection. 8. Most mechatronic product control systems include automatic control, automatic diagnosis, automatic information processing, automatic correction, and (automatic detection). 9. Mechatronics includes mechanical technology, computer and information processing technology, system technology, (automatic control) technology, sensing and detection technology, and servo drive technology. 10. Electrical control schematic design follows the order: main circuit - control circuit - (interlock and protection) - overall inspection. 11. The retrofit of economical CNC machine tools is mainly used for converting medium and small (lathes) and milling machines. 12. The SIN840C can implement (3D) differential compensation. 13. CBS stands for CENTERSERVICEBOARD. 14. The SIN840C control system consists of a numerical control unit body, a spindle, and a (servo unit). 15. There are four main machining operations on the machine operation panel: JOG manual, TEACHIN teaching, MDA (manual data input automatic operation), and AUTOMATIC automatic. 16. In an automatic control system, a system that can follow input changes with a certain degree of accuracy is called a (servo) system. 17. The inverting proportional amplifier has two inputs: one (inverting) and one non-inverting. 18. Lean production promotes the next process by changing the mode of the previous process (the next process requires the previous process to produce). 19. (Guided operational training) is an essential way to improve students' independent operation skills. 20. To enhance the reliability of electrical equipment, the transformer neutral point is connected to the grounding pole, known as working ground. Part B 1. The CNC system relies on (software) to meet the needs of different types of machine tools. 2. A typical industrial control system consists of (primary equipment) and an industrial control unit. 3. When inductance and compensation capacitors are in series resonance, the impedance is (minimum). 4. Floating connection requires that the insulation resistance between the whole machine and ground is not (less than) 50MΩ. 5. Magnetic circuit shielding uses (magnetic material) to close the magnetic field and connects the shielding wire to the ground. 6. The junction of the zero signal reference potential must ensure that (interference current) does not flow through the signal line. 7. With 12 switch input nodes and 8 output nodes, the F-20MR controller can meet the requirements. 8. The electrical control schematic is designed in the order of main circuit - control circuit - (interlock and protection) - overall inspection. 9. Digital display machine tools install digital (position) detection devices on ordinary machine tools. 10. The SIN840C (standard system) software includes two types of settings: lathe and milling machine. 11. On the machine operation panel, there are four machining modes: JOG manual, TEACHIN teaching, MDA manual input data, and AUTOMATIC. 12. The IFT5 brushless three-phase motor includes a stator, rotor, and a brushless feedback system that detects the rotor position and (speed). 13. The difference compensation principle calculates the end point and (curve equation) in real time. 14. The SIN840C control system consists of a numerical control unit body, a spindle, and a (feed servo unit). 15. The servo system of a CNC machine tool generally includes a mechanical transmission system and a (drive) device. 16. The (ISO14000) series of standards relates to environmental management. 17. The advantage of the DC drive system is its good (speed regulation) performance. 18. Improving labor productivity aims to reduce costs, accelerate economic development, and achieve modernization. 19. In instructional operation and independent training, students should perform (independent and practical) tasks repeatedly. 20. (Protective grounding) is used in electrical equipment where the power neutral is not directly grounded. Part C 1. The CNC system has good (flexibility), versatility, and reliability. 2. The (primary equipment) part of an industrial control system includes the controlled object, transmitter, and actuator. 3. When inductance and compensation capacitors are in series resonance, the current is (maximum). 4. Floating connection is prone to (static) interference. 5. When a grounded signal source is connected to an ungrounded amplifier, the shield at the input should be connected to the (amplifier). 6. Using a low-noise preamplifier prevents (self-oscillation) between amplifiers. 7. Mechatronics integrates electronic device functions into (mechanical devices) for better system performance. 8. Most mechatronic control systems have automatic control, automatic shut-off, automatic information processing, (automatic correction), and automatic detection. 9. Mechatronics includes mechanical, computer, system, (automatic control), sensing, and servo technologies. 10. The electrical control schematic is designed in the order of main circuit - control circuit - (interlock and protection) - overall inspection. 11. PCL retrofit replaces large and complex (relay) control devices with programmable controllers. 12. The SIN840C system module has (fewer) components, clear structure, and easy maintenance. 13. On the machine operation panel, there are four machining modes: JOG manual, TEACHIN teaching, MDA, and AUTOMATIC. 14. The difference compensation principle calculates the coordinates of intermediate points in real time based on the start point and (curve equation). 15. The mechanical transmission system of the servo system includes a drive system, mechanical components, and a (drive component). 16. The servo system is a feedback control system that uses the (offset value) generated after comparison to adjust the system. 17. CIMS stands for (Computer Integrated Manufacturing System). 18. All direct and indirect working hours required to complete a task are included in the (fixed time) quota. 19. Guided operation involves demonstration and (field technology) instruction. 20. (Two-phase electric shock) is the most dangerous type of electric shock. Part D 1. To facilitate system maintenance, the CNC system has a self-diagnosis feature. 2. The hardware of an industrial control system includes a computer basic system and a (process I/O system). 3. To avoid (resonance), a reactor should be connected in series before the compensation capacitor. 4. The A/D converter is crucial when acquiring weak signals of 0–50 mV using (simulated grounding). 5. When a grounded signal source is connected to an ungrounded amplifier, the input shield should be connected to the (source). 6. Pay attention to magnetic flux leakage direction and reduce (mutual inductance coupling). 7. With the development of electronics and mechanics, system optimization is achieved through (optimization). 8. Most mechatronic controls have (automatic control), automatic diagnosis, automatic information processing, (automatic correction), and automatic detection. 9. The frequency converter retrofit speed control system uses AC frequency conversion instead of (DC speed control). 10. Machine data, PLC programs, and machining operations can be backed up on the (MMC) hard disk. 11. On the machine operation panel, there are four machining operations: JOG (manual), TEACHIN (teaching), MDA (manual data input), and AUTOMATIC. 12. The SIN840C can implement (3D) interpolation. 13. The mechanical transmission system of the servo system includes (servo drive) system, mechanical components, and drive components. 14. The servo system uses (command pulse) as the input set value and compares it with the output. 15. The inverting proportional amplifier has two inputs: one (in-phase) and one inverting. 16. An automatic control system that follows input changes is called a (servo) system. 17. CIMS includes business management, engineering design automation, manufacturing automation, and (quality assurance). 18. Improving labor productivity reduces (production costs) and accelerates economic growth. 19. During training, emphasize (safe) practices for trainees. 20. (Two-phase electric shock) is the most serious form of electric shock. Part E 1. The FANUC system's F15 series has a (32)-bit CNC device, making it an intelligent CNC device. 2. The LJ-20 series PCL forms object files and (ladder) files via computer programming. 3. When connecting a motor to the inverter input side, (capacitor) should not be added to increase the power factor. 4. The three-wire sampling double-shielded floating technology samples the ground and (signal line). 5. Floating connection requires the whole machine's insulation resistance to be (not less than) 50MΩ. 6. For small inverters, each phase conductor can be wound on the (zero-sequence reactor) for more than 4 turns. 7. Mechatronics includes mechanical, computer, (information processing), system, automatic control, sensing, and servo technologies. 8. Electrical control schematic design follows the order: main circuit - control circuit - (interlock and protection) - overall inspection. 9. The inverter retrofit speed control system improves (speed control) and reduces energy consumption. 10. Interpolation in CNC systems is typically done by (software). 11. The SIN840C numerical control unit includes the display part, (host frame), input/output device, and drive unit. 12. Machine data, PLC program, and processing can be backed up on the (MMC) hard disk. 13. CSB stands for CENTERSERVICEBOARD. 14. The servo drive system is composed of (drive control) and drive components. 15. The detecting device in the servo system consists of (detection elements). 16. The servo system of a CNC machine tool includes a mechanical transmission system and a (detection) device. 17. All direct and indirect working hours required for production tasks are included in the (fixed time) quota. 18. Lean production changes the mode of the next project to promote the next project (the next project pulls the previous project). 19. Through guided operation, students' (hands-on) ability is improved. 20. Low-frequency current is (more) harmful to the human body than high-frequency current. Multiple Choice Questions A 1. When replacing a capacitor, the capacitor (B) must first meet the requirements. A. Capacitance B. Withstand voltage C. Current D. Power 2. The tester can provide three input formats: PROTEL file format, (C), and index table format. A. BMP B. Text C. Connection table D. JGP 3. Common industrial control systems are divided into distributed control systems, programmable controllers, STD bus industrial control machines, (B), modular control systems, etc. A. 16-bit single board B. Industrial PCC C. 32-bit single unit 4. When the three-phase input voltage unbalance rate of the distribution transformer exceeds (D), it will have adverse effects. A. ±5% B. ±3% C. 5% D. 3% 5. The frequency converter retrofit speed control system improves (A) performance and reduces power consumption. A. Speed control B. Accuracy C. Anti-disturbance D. Stability 6. PLC retrofit replaces large and complex (B) control devices in the original equipment. A. Analog B. Relay C. Real D. Timing logic 7. The frequency converter retrofit speed control system replaces the original equipment (C) or other motor speed control schemes. A. Variable pole speed B. Variable voltage C. DC speed D. Closed loop negative feedback 8. The transistor diagram shows that when measuring the triode (C), the distance between the family of characteristic curves can be changed. A. Step selection B. Power resistor C. Collector-base current/potential D. Peak range 9. Repeated grounding reduces the voltage of the leaking device to ground and reduces the risk of (A) disconnection. A. Neutral line B. Protection ground C. Phase line D. Phase and center line 10. The leakage protection device can cut off the power supply in (D) when the human body touches the charged body. A. 10s B. 5s C. 1s D. 0.1s B 1. 50uF/400V is equivalent to (A) in parallel with 100uF/400V. A. 150uF/400V B. 75uF/400V C. 150uF/800V D. 25uF/400V 2. The logic analyzer is developed according to the (C) idea. A. Storage oscilloscope B. Dual trace oscilloscope C. Multi-line oscilloscope D. Logic circuit 3. A single CPU industrial control system can control (D) loop time-sharing. A. Multiple open-loop B. Two closed-loop C. Three closed-loop D. Multiple closed-loop 4. When inductance and compensation capacitor are in series resonance, the impedance is (B). A. Zero B. Minimum C. Maximum D. Short circuit 5. The frequency converter retrofit speed control system improves (A) performance and reduces power consumption. A. Speed control B. Accuracy C. Anti-disturbance D. Stability 6. PLC retrofit replaces large and complex (B) control devices in the original equipment. A. Analog B. Relay C. Real time D. Sequential logic 7. The frequency converter retrofit speed control system replaces the original equipment (C) or other motor speed control schemes. A. Variable pole speed B. Variable pressure C. DC speed D. Closed loop negative feedback 8. The main frequency signal generator uses the frequency adjustment knob to change the main vibration map (A). A. Variable circuit B. Lower voltage C. Current size D. Variable resistance 9. Electric shock (B) should be rescued with artificial respiration and chest compression. A. Have heartbeat without breathing B. No heartbeat and no breathing C. No heartbeat, breathing D. Difficulty breathing 10. The main circuit switching device of the high-performance high-voltage inverter speed control device adopts (B). A. Fast recovery diode B. Insulated gate bipolar transistor C. Power transistor D. Power field effect transistor C 1. The mounting dimensions of the PLC module, (D), etc., are generally standardized. A. Current class B. Power class C. Insulation class D. Voltage class 2. Accuracy is the deviation from the true value. The size of (C) indicates accuracy. A. Additional error B. Basic error C. Systematic error D. Absolute error 3. The primary equipment of a typical industrial control system usually consists of a (C) transmitter and actuator. A. Sensor B. Probe C. Controlled object D. Primary cable 4. To reduce (B) on the inverter output side, an output reactor can be installed. A. Power supply B. Electromagnetic noise C. Higher harmonic D. Signal 5. The frequency converter retrofit speed control system improves (A) performance and reduces energy consumption. A. Speed regulation B. Accuracy C. Anti-disturbance D. Stability 6. PLC retrofit replaces large and complex (B) control devices in the original equipment. A. Analog B. Relay C. Time real D. Sequential logic 7. When conducting theoretical teaching, in addition to textbooks, some (A) aspects should be introduced. A. "Four new" application B. Case C. Students interested D. Technology dynamics 8. The frequency converter retrofit speed control system replaces the original equipment (C) or other motor speed control scheme. A. Variable pole speed B. Variable pressure C. DC speed D. Closed loop negative feedback 9. Digital display retrofit installs a digital display (B) detection device on ordinary machine tools. A. Spindle rotation speed B. Position C. Overload D. Feed rate 10. Observing the waveform on the oscilloscope is done by (B). A. Filament voltage B. Deflection system C. Acceleration pole voltage D. Focus voltage D 1. The modulated signal is expressed in the form of (A). A. Discrete B. Sword C. Surround D. Oscillation 2. 50uF/400V is equivalent to (A) in parallel with 100uF/400V. A. 150uF/400V B. 75uF/400V C. 150uF/800V D. 25uF/400V 3. When (A) is involved, artificial respiration should be performed. A. Have a heartbeat and no breath B. Have a breath without heartbeat C. No heartbeat and no breathing D. Both heartbeat and breathing 4. Floating connection requires the insulation resistance of the whole machine and ground to be (C). A. Less than 4Ω B. Greater than 500MΩ C. Less than 500MΩ D. Greater than 50MΩ 5. PLC retrofit replaces large and complex (B) control devices in the original equipment. A. Analog B. Relay C. Time real D. Sequential logic 6. The frequency converter retrofit speed control system replaces the original equipment (C) or other motor speed control scheme. A. Variable pole speed B. Variable pressure C. DC speed D. Closed loop negative feedback 7. The digital display machine tool is equipped with a digital display (B) detection device. A. Spindle rotation speed B. Position C. Overload D. Feed rate 8. The retrofit of economical CNC machine tools is mainly used for the numerical control transformation of medium and small (A) and milling machines. A. Lathe B. Grinder C. Drilling machine D. Boring machine 9. The master production plan (MP3), material requirements planning (MRP), production schedule (DS), and capacity demand plan (CRP) constitute (B). A. Lean production plan B. Manufacturing resource plan MRPII C. Kanban management plan D. Comprehensive production plan 10. When (A) is involved, artificial respiration should be performed. A. Have a heartbeat without breathing B. No heartbeat and no breathing C. No heartbeat, breathing D. Difficulty breathing True or False Questions 1. The PROGEAMMING of the SIN840C main menu is edited on the MMC hard disk and in ASCII code. (√) 2. The DIAGNOSIS diagnostic area is primarily used for machine tool adjustment and maintenance. (√) 3. The A/D converter is an AC to DC converter. (×) 4. The master production plan (MP3), material requirements planning (MRP), production schedule (DS), and capacity demand plan (CRP) constitute the manufacturing resource plan MRPII. (√) 5. ISO9000-4 in the ISO9000 family is the guiding standard. (×) 6. Maintenance electrician classes are mainly for production services. (√) 7. The general approach to theoretical training is classroom instruction. (√) 8. Guiding the operation is an extremely important method to develop and improve student skills. (×) 9. Practice has proved that low frequency current is less harmful than high frequency current. (×) 10. When an electric shock victim has a heartbeat and no breathing, artificial respiration should be performed. (√) 1. SIN840C can achieve 3D interpolation. (√) 2. PROGEAMMING of the main menu of SIN840C is edited on the MMC hard disk and in ASCII code. (√) 3. The square wave is generated by the scan in the oscilloscope. (×) 4. Production synchronization is a production logistics control system. (×) 5. ISO9004-1 in the ISO9000 family is the basic standard. (√) 6. The ISO9000 series of standards is related to environmental management. (×) 7. Theoretical training should be organized and systematic, paying attention to theory and practice. (√) 8. Maintenance electricians pay special attention to the first power off. (×) 9. Two phases are the most serious electric shock accidents. (√) 10. When the electric shock victim has no heartbeat, use the chest compression method. (√) 1. CSB central service board is the abbreviation of CENTERSERVICEBOARD. (√) 2. DIAGNOSIS diagnostic area is mainly used for machine tool adjustment and maintenance. (√) 3. When repairing the DC electrode, a withstand voltage test is performed between the windings, and the test voltage is DC. (×) 4. Just-in-time production mode’s business goal is quality. (×) 5. The difference between ISO 9000 and TQC is that ISO 9000 is quality assurance from the buyer’s standpoint. (√) 6. The first part of the quality system is quality management and quality system in the GB/1900-ISO9000 “Quality Management and Quality Assurance†national standard. (×) 7. When carrying out theoretical training, it should be combined with problems in the enterprise’s production technology and quality. (√) 8. Through the demonstration of operational skills, students’ hands-on ability is continuously improved. (√) 9. Protective earthing is used for electrical equipment where the neutral line is directly grounded. (×) 10. The conductor cuts the magnetic field lines in the magnetic field to generate induced electromotive force, and its direction is determined by the right-hand amperometric rule. (√) 1. CSB central service board is the abbreviation of CENTERSERVICEBOARD. (√) 2. PROGEAMMING of the SIN840C main menu is edited on the MMC hard disk and in assembly language. (×) 3. When operating the crystal plotter, pay special attention to the power supply voltage, step selection, and peak range selection switch position, which are the main causes of damage. (√) 4. The required practice of lean production is the Ford production method. (×) 5. The ISO-14000 series of standards is related to environmental management. (√) 6. ISO is an abbreviation of International Electrotechnical Organization. (×) 7. ISO9004-1 is a guide to quality management and quality system elements. (√) 8. It is also very important to introduce new technologies, knowledge, materials, and equipment to students. (×) 9. Theoretical training is generally carried out using inspiring teaching methods. (×) 10. The function of repeated grounding is to reduce the ground voltage of the foreigner of the leakage equipment and reduce the danger of the neutral line disconnection. (√) 1. SIN840C can realize position interpolation. (×) 2. DJAGNOSIS diagnostic area is mainly used for machine tool adjustment and maintenance. (×) 3. The model of domestic integrated circuits consists of five parts. (√) 4. In repair work, it is necessary to repair according to the original data and accuracy requirements of the equipment, strictly controlling the quality of the repair. (√) 5. Lean production is suitable for modern manufacturing enterprises. (√) 6. The direct cause of the ISO14000 series is the performance degradation of the product. (×) 7. ISO 9000 family standards include quality terminology standards (ISO8402). (×) 8. The purpose of guiding the operation training is to enable trainees to master the technical knowledge of the maintenance electrician through classroom teaching. (√) 9. When conducting theoretical teaching, in addition to textbooks, contents of some “four new†applications should be introduced. (√) 10. To improve the reliability of electrical equipment, the neutral point of the secondary side of the transformer is closely connected to the grounding pole, known as working ground. (√)
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