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Automatic Control Systems - Engineering

Q1:

Which of the following can act as error detecting devices
  1. a pair of potentiometers
  2. a pair of synchros
  3. a differential transformer
  4. a metadyne
  5. a control transformer
Select the answer using the following codes:

A 1, 2, 5

B 2, 3, 4, 5

C 1, 3, 4, 5

D 1, 2, 3, 4

ANS:A - 1, 2, 5

No answer description is available.