Programmable Logic Controller (PLC) MCQ Quiz - Multiple Choice Questions & Answers

1. PLC is an acronym of _______________ Logic Controller

1. Programmable
2. Peripheral
3. Periodic
4. Pneumatic

2. Unitary PLC has 20 inputs and __________ outputs

1. 20
2. 18
3. 12
4. 10

3. Ladder Logic Programming consists primarily of

1. logic gate symbol and connecting lines
2. virtual relay contacts and coils
3. function blocks and connecting lines
4. text-based codes

4. PLCs having less than __________ inputs and outputs are called as Small PLC

1. 50
2. 100
3. 150
4. 200

5. In a PLC, scan time refers to the amount of time in which

1. timer and counters are indexed by
2. one rung of ladder logic takes to get complete
3. the entire program takes to excecute
4. the technician enters the program

6. HMI means __________ Machine Interface

1. Human
2. Hard
3. Heart
4. High

7. Medium PLC has _____________ inputs and outputs

1. 100 - 200
2. 1000 - 4000
3. 2000 - 4000
4. 4000 - 8000

8. Main difference between online and offline PLC programming is

1. where the edited program resides
2. whether the programming PC has internet connectivity
3. whether the PLC is running or stopped
4. the type of program used

9. ______________ language can be programmed interactively with the PLC

1. Online
2. Offline
3. Basic
4. C

10. For a 16-bit register, which is the largest integer number a PLC counter function can reach

1. 32,768
2. 65,535
3. 65,536
4. 32,767