Synchros, Servos And Gyros Principles: Exam!

103 Questions | Total Attempts: 497

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Synchros, Servos And Gyros Principles: Exam!

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Questions and Answers
  • 1. 
    Which of the following terms accurately describes a synchro?
    • A. 

      Position-sensing

    • B. 

      Electromechanical

    • C. 

      Rotary

    • D. 

      Each of the above

  • 2. 
    What are the two general classifications of synchro systems?
    • A. 

      Torque and load

    • B. 

      Torque and control

    • C. 

      Load and control

    • D. 

      Load and lock

  • 3. 
    What is the difference in application between the two classifications of synchros?
    • A. 

      Light versus heavy load

    • B. 

      Mechanical versus electrical Output

    • C. 

      Circular versus straight-line motion

    • D. 

      High-frequency versus low-frequency operation

  • 4. 
    Which of the following types of synchro devices provides a mechanical output?
    • A. 

      A control transformer

    • B. 

      A torque receiver

    • C. 

      A torque transmitter

    • D. 

      A control transmitter

  • 5. 
    A 115-volt, 400-Hz torque transmitter with a diameter of 2.36 inches will have what military standard designation code?
    • A. 

      115 V-23CT6

    • B. 

      115 V-24TT4

    • C. 

      23TD4

    • D. 

      24TX4

  • 6. 
    A 3.5-inch diameter differential receiver will have what Navy prestandard designation code?
    • A. 

      35CR

    • B. 

      35TDR

    • C. 

      5D

    • D. 

      5DG

  • 7. 
    What does the arrow on a synchro schematic symbol indicate?
    • A. 

      The direction of current flow

    • B. 

      The direction of rotor movement

    • C. 

      The angular position of the stator

    • D. 

      The angular position of the rotor

  • 8. 
    What are the two major components of a synchro?
    • A. 

      The rotor and the stator

    • B. 

      The housing and the stator

    • C. 

      The rotor and the shaft

    • D. 

      The housing and the shaft

  • 9. 
    What type of rotor can be composed of a single winding or three Y-connected windings?
    • A. 

      Salient-pole

    • B. 

      Drum or wound

    • C. 

      Fixed

    • D. 

      "H"

  • 10. 
    How does the stator of a TX receive voltage?
    • A. 

      By a physical connection with the rotor

    • B. 

      By a magnetic coupling with another stator

    • C. 

      By a magnetic coupling with the rotor

    • D. 

      By a physical connection with a source

  • 11. 
    What part of a synchro provides a point for external connections?
    • A. 

      The terminal board

    • B. 

      The slip ring

    • C. 

      The stator

    • D. 

      The brush

  • 12. 
    Which of the following terms is defined as the amount of load a machine can turn?
    • A. 

      Radian force

    • B. 

      Load factor

    • C. 

      Torque

    • D. 

      Tension

  • 13. 
    Which of the following units should be used in measuring the amount of turning force of a synchro?
    • A. 

      Ounces

    • B. 

      Pounds

    • C. 

      Foot-pounds

    • D. 

      Ounce-inches

  • 14. 
    An overloaded synchro will probably exhibit which of the following conditions?
    • A. 

      Overspeed

    • B. 

      Oscillation

    • C. 

      Excessive temperature

    • D. 

      Noisy operation

  • 15. 
    A synchro receiver has which of the following characteristics that is NOT found in an ordinary transformer?
    • A. 

      A primary that can rotate in relation to the secondary

    • B. 

      A primary magnetically coupled to the secondary

    • C. 

      A step-up turns ratio

    • D. 

      An air core

  • 16. 
    When a synchro transmitter is in the zero-degree position, the rotor is aligned in what manner?
    • A. 

      With winding S1

    • B. 

      With winding S2

    • C. 

      With winding S3

    • D. 

      Between winding S1 and S2

  • 17. 
    Maximum voltage is induced in a stator winding of a synchro transmitter when the rotor and the stator winding have what angle between them?
    • A. 

      0 degrees

    • B. 

      30 degrees

    • C. 

      60 degrees

    • D. 

      90 degrees

  • 18. 
    Which of the following factors does NOT affect the amplitude of the voltage induced in a stator winding of a synchro transmitter?
    • A. 

      The angular displacement between the rotor and stator

    • B. 

      The amplitude of the primary voltage

    • C. 

      The speed of data transmission

    • D. 

      The turns ratio of the synchro

  • 19. 
    Damping is necessary for which of the following synchro devices?
    • A. 

      Receiver

    • B. 

      Transmitter

    • C. 

      Control transformer

    • D. 

      Differential transmitter

  • 20. 
    The primary purpose of damping is to reduce which of the following conditions in a synchro device?
    • A. 

      Readings 180ยบ out of phase

    • B. 

      Overheating

    • C. 

      Oscillating

    • D. 

      Each of the above

  • 21. 
    What is the minimum number of synchro devices needed for a simple synchro transmission system?
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      Four

  • 22. 
    In a simple synchro system, what leads are connected to the source voltage?
    • A. 

      R1 and R2

    • B. 

      S1 and S2

    • C. 

      S2 and S3

    • D. 

      R1 and S1

  • 23. 
    When a synchro transmitter, and receiver are in correspondence, what is the relative value of the (a) current through the stators and (b) receiver torque?
    • A. 

      (a) Maximum (b) maximum

    • B. 

      (a) Maximum (b) minimum

    • C. 

      (a) Minimum (b) minimum

    • D. 

      (a) Minimum (b) maximum

  • 24. 
    What term applies to the angle through which a synchro transmitter rotor is rotated mechanically?
    • A. 

      Lag

    • B. 

      Lead

    • C. 

      Gain

    • D. 

      Signal

  • 25. 
    If a synchro receiver is required to rotate in a direction opposite to the rotation of the transmitter rotor, what leads should be reversed?
    • A. 

      R1 and R2

    • B. 

      S1 and S2

    • C. 

      S2 and S3

    • D. 

      S1 and S3

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