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Electronic Mechanic Practice Test: Digital Panel Meter
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Electronic Mechanic Practice Test: Digital Panel Meter
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25 Questions

1. What is the function of the 7 segment LED display system part marked ‘X’?
2. What is the count range of 3 digit DPM?
3. Which signal format is used in Digital Panel Meter to display the input information?
4. Which IC is used to convert 4 bit binary coded decimal into 8 bit seven segment data?
5. What is the voltage drop across the shunt resistor for full scale range in 0 to -1A Digital Panel Meter?
6. How the scaling down of the input is arranged in the Digital Panel Meter?
7. Which stage provides the required current to display the LED type seven segment display device?
8. What is the required current to glow the LED in each segment of seven segment display device?
9. How many input lines are available in BCD to 7 segment decoder IC?
10. Which meter measures all input voltages scaled down in discrete steps to match the full count range?
11. Which mode is selected for operation to enable the read/write pin of LCD module kept at high level?
12. What causes the change in light angle passing through the molecules of liquid crystal display?
13. What is the name of digital electronic device marked ‘x’?
14. Which type of seven segment display anodes of all the segments are connected together?
15. How the pin number of seven segment display device is marked?
16. What is the battery voltage rating of Digital Panel Meter marked ‘X’?
17. What is the function of the resistor connected in the Digital Panel Meter circuit?
18. How the seven segment display glows to display the decimal numbers 0 to 9?
19. What is the function of transistor in the seven segment display circuit?
20. Which combination of segments are switched ON to display the digit 6 by the seven segment display?
21. Which IC is used on the BCD to 7 segment decoder in the display circuit?
22. Which type of seven segment display all the 8 anodes are left free?
23. Which IC is used in the LCD digital panel meter?
24. Which connection makes the individual segment in a common anode type 7 segment display illuminated?
25. Which device converts one type of digital format into another digital format?

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