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Electrical Control Systems - section-1
  1. A control system working under unknown random actions is called

    2. A.

     Computer control system
    B.

     Digital data system
    C.

     Stochastic control system
    D.

     Adaptive control system

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  2. From which of the following transfer function can be obtained ?

    3. A.

     Signal flow graph
    B.

     Analogous table
    C.

     Output-input ratio
    D.

     Standard block system
    E.

     None of the above

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  3. Which of the following devices is used for conversion of co-ordinates ?

    4. A.

     Microsyn
    B.

     Selsyn
    C.

     Synchro-resolver
    D.

     Synchro-transformer

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  4. Which of the following is an open loop control system ?

    5. A.

     Field controlled D.C. motor
    B.

     Ward leonard control
    C.

     Metadyne
    D.

     Stroboscope

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  5. Which of the following is exhibited by Root locus diagrams ?

    6. A.

     The poles of the transfer function for a set of parameter values
    B.

     The bandwidth of the system
    C.

     The response of a system to a step input
    D.

     The frequency response of a system
    E.

     None of the above

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  6. Which of the following devices are commonly used as error detectors in instruments ?

    7. A.

     Vernistats
    B.

     Microsyns
    C.

     Resolvers
    D.

     Any of the above

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  7. Which of the following statements is not necessarily correct for open control system ?

    8. A.

     Input command is the sole factor responsible for providing the control action
    B.

     Presence of non-linearities causes malfunctioning
    C.

     Less expensive
    D.

     Generally free from problems of non-linearities

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  8. The on-off controller is a _____ system.

    9. A.

     digital
    B.

     linear
    C.

     non-linear
    D.

     discontinuous

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  9. A controller, essentially, is a

    10. A.

     sensor
    B.

     clipper
    C.

     comparator
    D.

     amplifier

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  10. The phase lag produced by transportation relays

    11. A.

     is independent of frequency
    B.

     increases linearly with frequency
    C.

     decreases linearly with frequency
    D.

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