In addition to the decimal number system, the number systems used ...

[nmorano1]

In addition to the decimal number system, the number systems used most often in PLC operation and programming are ________.
 
  A) BCD and hexadecimal B) Binary and octal
  C) Binary and hexadecimal D) Octal and BCD

Question 2

Select the timing relay that fits this operation: after the coil is energized NC contacts open and remain open as long as the coil is energized. When the coil is de-energized, the timed contacts remain open for the set time delay value.
 
  A) NCTO B) NOTO C) NCTC D) NOTC

[dellikani2015]

Answer to Question 1

C

Answer to Question 2

C

[nmorano1]

Wow, this really help

[bbburns21]

Gracias!