Computer Aided Manufacturing (2171903) MCQs
MCQs of Programmable Logic Controllers
| 21. |
In PLC, a digital counter consists of
|
||||||||
|
Answer:
Option (d) |
| 22. |
The accumulator is used to either increment or decrements a count each time an input pulse is received.
|
||||
|
Answer:
Option (a) |
| 23. |
When the accumulator value equals the register value, the relay contact is
|
||||||||
|
Answer:
Option (b) |
| 24. |
Memory size in a PLC is measured in either bits, bytes or words.
|
||||
|
Answer:
Option (a) |
| 25. |
Volatile memory of PLC maintains the information in memory even if the power is interrupted.
|
||||
|
Answer:
Option (b) |
| 26. |
Peripherals are used in PLC to
|
||||||||
|
Answer:
Option (d) |
| 27. |
Which is the type of PLC peripheral?
|
||||||||
|
Answer:
Option (d) |
| 28. |
Which is not the type of PLC peripheral?
|
||||||||
|
Answer:
Option (c) |
| 29. |
__________ is a means of graphically representing the logic required in a relay logic system.
|
||||||||
|
Answer:
Option (b) |
| 30. |
Power flows from the left rail to the right rail, and each rung must have an output to prevent a short.
|
||||
|
Answer:
Option (a) |
