Chapter 7 PROGRAM LOGIC CONTROLER (PLC) AND GATES MCQs

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1. . The acronym PLC stands for:





2. . Ladder logic programming consists primarily of:





3. . Very often relays and valves are connected to:





4. . PLCs that have a fixed amount of I/O capability built into the unit are known as:





5. . The universal gate is ………………





6. . The inverter is ……………





7. . The inputs of a NAND gate are connected together. The resulting circuit is …………





8. . The NOR gate is OR gate followed by ………………





9. . The NAND gate is AND gate followed by …………………





10. . Digital circuit can be made by the repeated use of ………………





11. . The only function of NOT gate is to ……………..





12. . When an input signal 1 is applied to a NOT gate, the output is ………………





13. . In Boolean algebra, the bar sign (-) indicates ………………..





14. . An OR gate has 4 inputs. One input is high and the other three are low. The output is ……





15. . Both OR and AND gates can have only two inputs.



16. . The output will be a LOW for any case when one or more inputs are zero in a/an …………





17. . The logic gate that will have HIGH or “1” at its output when any one of its inputs is HIGH is a/an …………… gate.





18. . Which of the following method is used to minimize Boolean expressions?





19. . Four adjacent ‘1’s in a Karnaugh map forms a





20. . A 4-variable Karnaugh map has





21. . In the Karnaugh map, each cell represents ___________ minterm derived from the Boolean expression.





22. . The sum or product of two minterms results in





23. . Product-of-Sums expressions can be implemented using





24. . The most popular language for PLCs is:





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