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PLC Programming Exam Questions and Answers, Exams of Computer Science

Texas State UniversityComputer Science

A comprehensive set of questions and answers related to programmable logic controllers (plcs). It covers fundamental concepts such as instruction addresses, i/o diagrams, logic conditions, and plc programming techniques. The material is designed to test and reinforce understanding of plc operation, including timers, network protocols, and troubleshooting. It is useful for students and professionals in automation and control systems.

Typology: Exams

2025/2026

Available from 11/26/2025

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Martin-Ray-1 🇺🇸

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Programmable Controller Operation – Final
Exam Edition.
Page 1 of 7
1. What are common names assigned to instruction addresses in a PLC program
called? - Correct Answer: >>Symbolic addresses
2. An I/O diagram shows the types and addresses of I/O control devices wired to
the PLC. What does a power diagram show? - Correct Answer: >>The
interaction of the control devices and power components
3. For a lamp connected to the PLC to function properly the lamp must be
connected to the correct __________ terminal. - Correct Answer:
>>Output
4. What address should be given to the PLC instruction with the X? - Correct
Answer: >>DI 00
5. What logic condition causes output DO 00 to turn on? - Correct Answer:
>>DI 00 ON and DI01 ON
6. Which type of discrete input instruction is closed, or true, when its input
terminal is energized by a voltage? - Correct Answer: >>NO contact
instruction
pf3
pf4
pf5

Partial preview of the text

Download PLC Programming Exam Questions and Answers and more Exams Computer Science in PDF only on Docsity!

Exam Edition.

  1. What are common names assigned to instruction addresses in a PLC program called? - Correct Answer: >>Symbolic addresses
  2. An I/O diagram shows the types and addresses of I/O control devices wired to the PLC. What does a power diagram show? - Correct Answer: >>The interaction of the control devices and power components
  3. For a lamp connected to the PLC to function properly the lamp must be connected to the correct __________ terminal. - Correct Answer:

    Output

  4. What address should be given to the PLC instruction with the X? - Correct Answer: >>DI 00
  5. What logic condition causes output DO 00 to turn on? - Correct Answer:

    DI 00 ON and DI01 ON

  6. Which type of discrete input instruction is closed, or true, when its input terminal is energized by a voltage? - Correct Answer: >>NO contact instruction

Exam Edition.

  1. Which type of instruction is located on the right-hand side of the rung and is on when a complete logic path is formed by the rung's input instructions? - Correct Answer: >>Output coil
  2. What is the name of the window that is used to add devices to a Micro800 PLC project called? - Correct Answer: >>Add Device window
  3. After a ladder logic program has been created, what is the process of checking the program for errors before downloading it to the PLC called? - Correct Answer: >>Compiling or building 10.What is the text that is added to make a PLC program called? - Correct Answer: >>Project documentation 11.What is it called when a PLC program is modified? - Correct Answer:

    Editing 12.What is one of the most basic applications of a PLC? - Correct Answer: Start/stop control of a motor 13.What is the type of valve used by fluid power motors to control flow to the motor called? - Correct Answer: >>Directional control valve

Exam Edition.

21.Which non-retentive timer instruction turns on its output immediately when its IN input turns true? - Correct Answer: >>Non-retentive off-delay 22.Which type of timer instruction does not reset when the IN input turns false? - Correct Answer: >>Retentive on-delay timer 23.What does a PLC monitor to control machine output device? - Correct Answer: >>Machine input sensors 24.One of the enclosure styles that are available for a Rockwell Micro800 PLCs is I/O chassis-style. What is the other style? - Correct Answer: >>Brick- style 25.What is the name of the PLC programming software used to program and monitor Rockwell Micro800 PLC? - Correct Answer: >>Connected Components Workbench 26.In a PLC Ladder Logic program, what type of instructions are located on the right hand side of the program's rungs? - Correct Answer: >>Direct coil (output) instructions 27.The PLC program does not start until a ________. - Correct Answer:

Input signal is received

Exam Edition.

28.What is the name of the 3-step process that the PLC uses to execute its program? - Correct Answer: >>Scan cycle 29.In the CCW software, what is the window in the software the presents the components of the project in a tree structure? - Correct Answer:

Project organizer 30.Single phase AC power is used for the power supple of this device. - Correct Answer: >>PLC 31.What is the name of the pushbutton in the MCR circuit that removes power from the PLC's outputs to stop the machine? - Correct Answer: Emergency stop 32.What is the name of the type of network used to communicate between an HMI panel and a PLC? - Correct Answer: >>Point-to-point network 33.What is the hardware/software combination that determines how data is encoded, transmitted, and checked for errors called? - Correct Answer: Network protocol

Exam Edition.

41.The input and output instructions used in a PLC program are linked to the PLC's physical input and output terminals through addresses. What does each address represent? - Correct Answer: >>A specific memory location in the PLC.