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EEE :: Electrical Machine Design

  1. In a D.C. machine, the value of peripheral speed should not, normally, exceed

  2. A.

     10 m/s

    B.

     20 m/s

    C.

     30 m/s

    D.

     40 m/s


  3. A moving-coil permanent-magnet instrument can be used as _____ by using a low resistance shunt.

  4. A.

     ammeter

    B.

     voltmeter

    C.

     flux-meter

    D.

     ballistic galvanometer


  5. Volt box is a component to

  6. A.

     extend voltage range

    B.

     measure voltage

    C.

     compare voltage in a box

    D.

     none of the above


  7. For measuring current at high frequency we should use

  8. A.

     moving iron instrument

    B.

     electrostatic instrument

    C.

     thermocouple instrument

    D.

     none of the above


  9. In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be

  10. A.

     out of phase by 90°

    B.

     out of phase by 60°

    C.

     out of phase by 30°

    D.

     out of phase by 0°


  11. The adjustment of position of shading bands, in an energy meter is done to provide

  12. A.

     friction compensation

    B.

     creep compensation

    C.

     braking torque

    D.

     none of the above


  13. A multirangq instrument has

  14. A.

     multiple shunt or series resistances inside the meter

    B.

     multicoii arrangement

    C.

     variable turns of coil

    D.

     multi range meters inside the measurement system

    E.

     any of the above


  15. Which of the following are integrating instruments ?

  16. A.

     Ammeters

    B.

     Voltmeters

    C.

     Wattmeters

    D.

     Ampere-hour and watt-hour meters


  17. The use of _____ instruments is merely confined within laboratories as standardizing instruments.

  18. A.

     absolute

    B.

     indicating

    C.

     recording

    D.

     integrating

    E.

     none of the above


  19. In a low power factor wattmeter the pressure coil is connected

  20. A.

     to the supply side of the current coil

    B.

     to the load side of the current coil

    C.

     in any of the two meters at connection

    D.

     none of the above