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Industrial Drives - section-1
Industrial Drives - section- 2
  1. The load cycle for a motor driving a power press will be

    2. A.

     Variable load
    B.

     Continuous
    C.

     Continuous but periodical
    D.

     Intermittent and variable load

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  2. Which of the following motors is used for elevators?

    3. A.

     Induction motor
    B.

     Synchronous motor
    C.

     Capacitor start single phase motor
    D.

     Any of the above

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  3. Ward-Leonard controlled D.C. drives are generally used for _________ excavators.

    4. A.

     Light duty
    B.

     Medium duty
    C.

     Heavy duty
    D.

     All of the above

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  4. A reluctance motor

    5. A.

     Is provided with slip rings
    B.

     Requires starting gear
    C.

     Has high cost
    D.

     Is compact

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  5. Which of the following motors are preferred for overhead traveling cranes?

    6. A.

     Slow speed motors
    B.

     Continuous duty motors
    C.

     Short time rated motors
    D.

     None of the above

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  6. In jaw crushers a motor has to often start against ________ load.

    7. A.

     Heavy
    B.

     Medium
    C.

     Normal
    D.

     Low

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  7. For which of the following applications D.C. motors are still preferred?

    8. A.

     High efficiency operation
    B.

     Reversibility
    C.

     Variable speed drive
    D.

     High starting torque

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  8. Is not a part of ball bearing?

    9. A.

     Inner race
    B.

     Outer race
    C.

     Cage
    D.

     Bush

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  9. The characteristics of drive for crane hoisting and lowering are which of the following?

    10. A.

     Precise control
    B.

     Smooth movement
    C.

     Fast speed control
    D.

     All of the above

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  10. The starting torque of a D.C. motor is independent of which of the following?

    11. A.

     Flux
    B.

     Armature current
    C.

     Flux and armature current
    D.

     Speed

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