Lighting engineer annual review test questions and stage lighting test answers
How many questions did you answer in the annual review test for lighting technicians?
As a lighting technician, you need to have a lot of knowledge and skills, from mechanics to electricians, from consoles to design, from high-altitude operations to music colors... Today's lighting technicians have become a compound talent spanning many fields. But the real society is very strange. Some bosses often consider whether a lighting technician is qualified based on a certain ability, just like "a blind man touching an elephant". Of course, it is not denied that there are some "lighting technicians" who are just filling in the numbers.
A chaotic and disorderly state is not conducive to the development of the company, nor is it suitable for the progress of promising young people. I hope that the lighting network can do something to contribute to the development of the industry. Thanks again to Mr. Wu Jiangnan of Ruiyi Tiancheng for providing the lighting engineer examination questions and answers, which provides us with a new idea for testing the ability of lighting engineers.
Below I share with you some lighting engineer annual review examination questions and answers summarized and published by the lighting designer of Guangzhou DoveFen.
Lighting Examination Questions and Answers
01. What will happen if an AC string line is connected to 8 pars (cp60)?
Answer:All dark! The brightness is 12.5%. In a series circuit, the current remains unchanged but the voltage decreases.
02. What will happen if an AC series line is connected to 7 ACs and a par (cp60)?
Answer:7 ACs are dimly lit. Par light is bright! The larger the resistance in the series circuit, the greater the voltage!
03. What will happen if a parallel line (four in parallel) is connected to 3 ACs and a par (cp60)?
Answer:3 ACs are burning. Par is on normally.
04. When connecting the power cable, what should be connected first and what should be connected later? When removing the cable, what should be removed first and what should be removed later?
Answer:When wiring, ground (E) neutral (N) live (L). To disconnect the power, first disconnect the three live wires (L), then neutral (N), and finally (E).
05. State the commonly used cross-sectional area specifications of power lines; and the calculation between cross-sectional area and electrical power. Say the formula and give an example?
Answer:Common specifications are: 1; 1.5; 2.5; 4; 6; 10; 16; 25; 35; 50; 70; 95; 120; 150; 185······. Calculation formula: 10 down five, 100 up two, 25, 35, four, three boundaries, .70, 95, two and a half times. Pipe, temperature, 80%, 90% off. Bare wire plus half. Copper wire upgrade calculation.
06. A lamp has 13 channels. How many lamps can be connected to one port on the console?
Answer: 512/13=39 (units)
07. A lamp has 9 channels. The first lamp has an address code of 9. What is the address code of the 49th lamp? Write a simple calculation method?
Answer:(49-1)*9+9=441
08. A silicon box has 12 channels. The first address code is 301. What is the address code of the 10th channel of the 8th silicon box? Write a simple calculation method?
Answer:(8-1)*12+301+(10-1)=394
09. There are 10 lamps with both three-core and five-core signal ports. Connect them with a five-core signal line, and then output a three-core signal main line from the control console and plug it into the fifth lamp. How many of these ten lamps are controlled at this time? (Note: power supply, address code, and console connection are normal)
Answer:All are controlled.
10. If the hot end 2 of a three-core signal line is broken, what will happen to the light? What will happen to the light if the cold end 3 is broken? What will happen to the light if the shield 1 is broken?
Answer:All are controlled. But the situation is different. If one of the 2nd or 3rd pin is broken, the signal will be weakened. If 1 is broken, it will be easily interfered by external signals. If one of them is welded correctly, the other two wires will be uncontrolled or the signal will be disordered. There are several other situations: if either 1 is broken when swapping 2 or 3, it will not be controlled, but if the male 1 or the female 3 is disconnected when swapping 2 or 1.3, the connection between the male 3 and the female 1 will be controlled, but the signal is weak and it will be easily interfered by external factors. Another situation is that if 3 is welded correctly and 1.2 is swapped, the male 1 or the female 2 is disconnected, and the male 2 is connected to the female 1, it will be controlled, but the signal is also weak and easily interfered by external factors.
11. Among Respironics color papers, does the Raden 85 series increase or decrease the color temperature? Does the Raden 82 series increase or decrease the color temperature? Write out the basic color segments from 101 to 909?
Answer: The Rhaden 85 series is a color temperature reduction color paper with pink color of 85, 85A, 85B, and 85C. Among them, 85C has the highest color temperature; the Rhaden 82 series is a color temperature of blue color of 82, 82A, 82B, and 82C. Among them, 82C has the highest color temperature. Red is about 101 to 110; pink is about 201 to 240; pink is about 301 to 310; orange is about 401 to 410. Yellow is about 501 to 510; green is about 601 to 610; blue-green is about 701 to 710; blue is about 801 to 815; purple is about 901 to 910. The larger the color number, the lighter the color.
12. What is the basic color temperature of PAR lamps, backlight lamps, screw lamps, and floodlights? LED lamp color temperature? Computer lamp basic color temperature?
Answer:Basic conventional lamps (PAR lamps. Back light lamps. Spotlights. Imaging lamps, etc.) have a color temperature of 2500k to 3500k. Computer lights generally have a color temperature of 5000k to 6000k in normal white light; the color temperature of LED lights is around 10000 when all colors are turned on.
13.380v electricity can be transformed into three 220v. Can three 220v live wires be transformed into 380v power?
Answer: No. There is no phase difference!
Where is the positive pole of the 14.4KW chasing light bulb?
Answer:The positive pole is at the end of the lamp holder.
15. How many lamps should be connected to a main signal line through an amplifier to ensure stability?
Answer:Between 8 and 12 units (the signal line is no more than 50 meters away from the amplifier)
16. How to solder the five-pin signal line of the console into two (one XLR male and two XLR female)?
Answer:1.2.3 Solder one of the female 123.; 145 solder the other female 123.
17. How many types of lamps are connected in series through a main signal line that passes through an amplifier to be more stable?
Answer:The total number cannot exceed 3 types when there are more than 10 units. You can string 5 types of devices in 5 devices (the signal line should not exceed 50 meters from the amplifier)
18. Is the paper of the rainbow machine and fireworks conductive? What should be paid attention to during installation?
Answer: Be careful not to blow at the gate box, silicon box, AC lamp or other bare wires that are charged! It is very dangerous!
19. Calculate the load-bearing frame. The length is 30 meters and the height is 15 meters, with each grid of 1.5 meters. How many horizontal bars are needed? How many vertical bars are needed? How many diagonal rods are needed? (The horizontal bar is 2 meters. The vertical pole is 2 meters in size)
Answer:Horizontal bar (3*15+1)*(30/1.5+1)=966; vertical pole 2*16*15=480; horizontal bar (3*15+1)*(30/1.5-1)=874
20. How to solve the interference of the rotating stage inverter to the lighting signal?
Answer:Add a frequency converter isolator. Or cover the frequency converter with an iron net!
What should I pay attention to before connecting the 21.220V two-plug dry ice truck to the power?
Answer:Make sure the live wire is connected to the live wire. Don't plug it in casually. If you connect it the wrong way, you will be electrocuted!
22. What kind of network cable should be used to connect Feizhu 3 and DP2000?
Answer:DP2000 uses a crossover cable; DP8000 uses a national standard ordinary cable
23. When the actual address code of the Martin 3000 strobe is 1.101.201.301.401.501, which numbers should be dialed on the lamp?
Answer:1 is dial 1; 101 is dialed (1.3.6.7); 201 is dialed (1.4.7.8); 301 is dialed (1.3.4.6.9); 401 is dialed (1.5.8.9); 501 is dialed (1.3.5.6.7.8.9)
24. When the mirror ball, Led nylon hose, are connected to the silicon box and controlled by the console. How can you make it stop and completely darken?
Answer: Connect it in parallel with a conventional lamp with a power greater than 100W.
25. How many T4 tubes can be connected in series at most?
Answer:8 is more stable
26. How to connect the string lights (40w frosted lights) with a silicon box?
Answer:Connect the 4 lights together. Make sure the live and neutral wires of the silicon box and the live and neutral wires of the string lights are connected in the right way. If they are connected in reverse, the silicon blocks of the silicon box will be burned!
27. What are the necessary points to look at when looking at the venue?
Answer: The size of the incoming goods route and the door and elevator. The location and size of the switch and the thickness of the upper switch wiring, as well as what kind of tools to use; the height, length and depth of the venue; the location of the light chaser. The location of the console. Weighing, position and operation of the boom; brightness and control method of the field lights; site requirements for construction (no smoking. Site protection measures include laying wooden boards or carpets, wearing safety helmets. Safety belts. Electrician's book. High-altitude work book. ID card, etc.)
28. How to prevent short circuit tripping when setting off cold fireworks?
Answer: Install a resistor after the control switch.