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PROGRAMMABLE LOGIC CONTROLLERS 5TH EDITION CERTIFICATION EVALUATION EXAMS 2026 QUESTIONS WITH ANSWERS GRADED A+

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PROGRAMMABLE LOGIC CONTROLLERS 5TH EDITION CERTIFICATION EVALUATION EXAMS 2026 QUESTIONS WITH ANSWERS GRADED A+

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PROGRAMMABLE LOGIC CONTROLLERS 5TH
EDITION CERTIFICATION EVALUATION EXAMS
2026 QUESTIONS WITH ANSWERS GRADED
A+


◉ When were PLCs first used? Answer: by General Motors in 1968


◉ What had to be done to change the control of operating machinery
with the old Relay logic? Answer: Physically rewire the control system
to perform the new changes.


◉ What are the 3 MAIN parts of a PLC? Answer: - Input Module
- output module
- CPU


◉ What are the 5 basic parts of a PLC? Answer: - Input module
- Output module
- CPU
- Power Supply
- Programming Device

, ◉ Advantages of the PLC Answer: -industrial wide voltage applications
- tolerate plant noise - EMI, RFI
- Provide isolation
- accept inputs from pilot devices (pushbuttons, switches)
- can output to contactors, actuators and indicators
- operate in wide ambient temperatures
- They include indicator lights


◉ What are the 2 sections of Memory? Answer: System memory and
Application Memory


◉ What are the 4 memory allocations of PLCs? Answer: - Executive
- Scratch Pad
- Data Table
- User Program


◉ Which 2 allocations of memory are not visible to the user? Answer:
Executive and Scratch Pad. These are part of the SYSTEM memory.


◉ In a 16 bit processor, how many bits are in a word? Answer: 16 bits


◉ How many bits is a byte? Answer: 8 bits

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