Michigan PLC Programming Exam question
with correct answers
(100% verified answers) plus rationales Q &A
2026 INSTANT DOWNLOAD PDF
1. What does PLC stand for?
A. Programmed Logic Controller
B. Programmable Logic Controller
C. Process Linear Control
D. Power Line Control
Correct Answer: B
PLC stands for Programmable Logic Controller, used in industrial automation.
2. Which language is most commonly used in PLC ladder programming?
A. Python
B. Ladder Logic
C. C++
D. Java
Correct Answer: B
Ladder Logic visually resembles relay circuits and is widely used in PLCs.
3. A PLC primarily replaces which system?
,A. Mechanical gears
B. Relay-based control systems
C. Hydraulic systems
D. Pneumatic tools
Correct Answer: B
PLCs replaced hardwired relay systems for better flexibility and reliability.
4. What is the input scan in PLC operation?
A. Writing program code
B. Reading input signals
C. Executing output devices
D. Storing data
Correct Answer: B
The PLC first reads all input states during the scan cycle.
5. Which memory type is volatile in PLC?
A. ROM
B. EEPROM
C. RAM
D. Flash
Correct Answer: C
RAM loses data when power is removed.
6. What is a normally open contact in ladder logic?
A. Always closed
B. Opens when energized
C. Closes when energized
D. No connection
, Correct Answer: C
Normally open contacts close when the input is true.
7. What is the main function of a PLC output module?
A. Store programs
B. Process logic
C. Control external devices
D. Compile code
Correct Answer: C
Output modules activate field devices like motors and lamps.
8. Which scan cycle step comes last?
A. Input scan
B. Program execution
C. Output update
D. System reset
Correct Answer: C
Outputs are updated after logic execution.
9. What does a timer instruction do?
A. Counts pulses only
B. Delays or measures time
C. Stores inputs
D. Converts signals
Correct Answer: B
Timers are used for time delays in automation.
10. What is a PLC rung?
with correct answers
(100% verified answers) plus rationales Q &A
2026 INSTANT DOWNLOAD PDF
1. What does PLC stand for?
A. Programmed Logic Controller
B. Programmable Logic Controller
C. Process Linear Control
D. Power Line Control
Correct Answer: B
PLC stands for Programmable Logic Controller, used in industrial automation.
2. Which language is most commonly used in PLC ladder programming?
A. Python
B. Ladder Logic
C. C++
D. Java
Correct Answer: B
Ladder Logic visually resembles relay circuits and is widely used in PLCs.
3. A PLC primarily replaces which system?
,A. Mechanical gears
B. Relay-based control systems
C. Hydraulic systems
D. Pneumatic tools
Correct Answer: B
PLCs replaced hardwired relay systems for better flexibility and reliability.
4. What is the input scan in PLC operation?
A. Writing program code
B. Reading input signals
C. Executing output devices
D. Storing data
Correct Answer: B
The PLC first reads all input states during the scan cycle.
5. Which memory type is volatile in PLC?
A. ROM
B. EEPROM
C. RAM
D. Flash
Correct Answer: C
RAM loses data when power is removed.
6. What is a normally open contact in ladder logic?
A. Always closed
B. Opens when energized
C. Closes when energized
D. No connection
, Correct Answer: C
Normally open contacts close when the input is true.
7. What is the main function of a PLC output module?
A. Store programs
B. Process logic
C. Control external devices
D. Compile code
Correct Answer: C
Output modules activate field devices like motors and lamps.
8. Which scan cycle step comes last?
A. Input scan
B. Program execution
C. Output update
D. System reset
Correct Answer: C
Outputs are updated after logic execution.
9. What does a timer instruction do?
A. Counts pulses only
B. Delays or measures time
C. Stores inputs
D. Converts signals
Correct Answer: B
Timers are used for time delays in automation.
10. What is a PLC rung?
