Types of Double Line Block Instruments
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Questions and Answers

What is the purpose of the Commutator Handle in a double line block instrument?

  • To supply power to the block instrument
  • To operate the block instrument (correct)
  • To control the conditional TOL locking
  • To connect the block instrument to the railway line

    • What is the frequency of periodical overhauling required for double line block instruments?

  • Once in 5 years
  • Once in 10 years
  • Once in 3 years
  • Once in 7 years (correct)

    • What is the current rating for the line current used in double line block instruments?

  • 30mA
  • 25mA (correct)
  • 35mA
  • 20mA

    • How often is simple regular maintenance required for double line block instruments?

    <p>Once in 15 days</p> Signup and view all the answers

    What type of block instrument is suitable for both Non-RE and RE sections?

    <p>Double line block instrument</p> Signup and view all the answers

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