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Author Question: SCR A) Breakover thyristor ... (Read 159 times)

asan beg

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on: Jul 28, 2018
SCR
 
  A) Breakover thyristor

Question 2

If the contact on a PLC ladder logic rung is an examine off type, then
 
  A) the field device must be a NO type of contact.
  B) power flows in the contact if the input pin associated with the examine off contact has zero volts present.
  C) the field device must be a NC type of contact.
  D) power flows in the examine off contact if the field device is a NC contact type and the contacts are in their normal position.
  E) None of the above


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momolu

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


asan beg

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Reply #2 on: Jul 28, 2018
Thank you!


momolu

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Reply #3 on: Jul 28, 2018
Always glad to help...


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