Q221
Relay ladder logic is used in a PC because:
A.
it is impossible to write a control program for a machine in any other logic
B.
it is the best industrial control language ever developed.
C.
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
AnswerD.
All of the above
E.
None of the above
Answer: Option C
Solution
Answer: Option C
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