PLC test 1 questions with complete solution

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PLC test 1 questions with complete solution

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Institution PLC

Course PLC

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PLC test 1 questions with complete solution

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PLC test 1 questions with complete solutions

If all the units are in one fixed enclosure, the PLC is called a _______ PLC - answer-
c c c c c c c c c c c c c c c c c

fixed

The four major components of a PLC power supply are a line conditioner or varistor,
c c c c c c c c c c c c c c

transformer/rectifier unit, RC filter, and _______ - answer-fixed plc
c c c c c c c c c

A(n) ________ is a semiconductor device that can maintain a steady voltage level -
c c c c c c c c c c c c c

answer-zener diode
c c

The section of the PLC system memory that holds the status of discrete input ports is the
c c c c c c c c c c c c c c c c

______ status - answer-input
c c c c

A ______ converts the digital output signals back to analog signals - answer-digital-to-
c c c c c c c c c c c c

analog converter c

The _______ segments holds the ladder logic program - answer-user memory
c c c c c c c c c c

T or F. One benefit of PLCs over electromechanical relay logic systems is PLCs require
c c c c c c c c c c c c c c

minor wiring and can be modified and reprogrammed within a few hours - answer-true
c c c c c c c c c c c c c c

T or F. Discrete input ports are ports that are either open (off) or closed (on) - answer-
c c c c c c c c c c c c c c c c c

true

T or F. Static RAM (SRAM) stores data in the form of charge on capacitors - answer-
c c c c c c c c c c c c c c c c

false

T or F. Read only memory (ROM) holds the permanent system programs - answer-true
c c c c c c c c c c c c c

T or F. The arithmetic logic unit (ALU) carries out math and logic instructions - answer-
c c c c c c c c c c c c c c c

true

T or F. Microprocessor units (MPUs) use an octal transciever to enable ROM,RAM,I/O
c c c c c c c c c c c c

port devices,and support chips - answer-false
c c c c c c

T or F. When selecting PLCs that meet your needs, you should consider manufacturer's
c c c c c c c c c c c c c

support, serviceability, and programming software - answer-true
c c c c c c c

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Uploaded on: June 21, 2025
Number of pages: 4
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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