Electrical Principles and PLCs Quiz

What might be the cause if a PLC system's hardware is functioning but the system is not operating correctly?

• Mechanical failure

• Power supply failure

• Software issues

• Incorrect wiring

Which of the following is NOT a source of voltage for portable PLCs?

• Wind turbines

• Solar panels

• Batteries

• Portable generators

What type of voltage ratings can PLC power supplies have?

• Single-phase rating

• Fixed voltage rating

• Variable voltage rating

• Dual voltage rating

What happens to the total resistance in a series circuit when more loads are added?

• It remains the same

• It fluctuates

• It decreases

• It increases

In a parallel circuit, what happens to the total current when more loads are added?

• It remains the same

• It increases

• It becomes zero

• It decreases