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EEE :: Electrical Machine Design

  1. The scale of a rectifier instrument is

  2. A.

     linear

    B.

     non-linear

    C.

     either (A) or (B)

    D.

     neither (A) nor (B)


  3. Which of the following in an application of D.C. motors?

  4. A.

     Traction

    B.

     Drives for process industry

    C.

     Battery driven vehicles

    D.

     Automatic control

    E.

     All of the above


  5. Most sensitive galvanometer is

  6. A.

     elastic galvanometer

    B.

     vibration galvanometer

    C.

     Duddlb galvanometer

    D.

     spot ballistic galvanometer


  7. Direct water cooling of rotor winding presents

  8. A.

     No mechanical difficulties

    B.

     Lesser mechanical difficulties

    C.

     Greater mechanical difficulties

    D.

     None of the above


  9. According to application, instruments are classified as

  10. A.

     switch board

    B.

     portable

    C.

     both (A) and (B)

    D.

     moving coil

    E.

     moving iron


  11. Tractive magnets are operated from

  12. A.

     a.c. supply

    B.

     d.c. supply

    C.

     either a.c. or d.c. supply

    D.

     none of the above


  13. If an instrument has cramped scale for larger values, then it follows

  14. A.

     square law

    B.

     logarithmic law

    C.

     uniform law

    D.

     none of the above


  15. The resistivity of water should not be less than

  16. A.

     10 Q m

    B.

     100 Q m

    C.

     1000 Q m

    D.

     2000 Q m


  17. In a D.C. machine the current per brush arm should not be more than

  18. A.

     100 A

    B.

     200 A

    C.

     300 A

    D.

     400 A


  19. The power factor of a single phase load can be calculated if the instruments available are

  20. A.

     one voltmeter and one ammeter

    B.

     one voltmeter, one ammeter and one wattmeter

    C.

     one voltmeter, one ammeter and one energy meter

    D.

     any of the above