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Electric Traction - section-1
Electric Traction - Section-2
  1. The coefficient of adhesion is
    2. A.
    same on ac and dc traction systems
    B.
    high in case of dc traction and low in ac traction
    C.
    low in case of ac traction and high in dc traction

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  2. The coasting retardation on trains is approximately
    3. A.
    0.16 km phps
    B.
    1.6 km phps
    C.
    16 km phps
    D.
    25 km phps

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  3. The acceleration rate of trains on suburban services is
    4. A.
    0.1 to 0.4 km phps
    B.
    0.8 to 1 km phps
    C.
    0.4 to 6.5 km phps
    D.
    10 to 26 km phps

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  4. Which braking system on the locomotives is costly
    5. A.
    Vacuum braking on steam locomotives
    B.
    Vacuum braking on diesel locomotives
    C.
    Regenerative breaking on electric locomotives
    D.
    All breaking systems are equally costly

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  5. The advantage of electric braking is
    6. A.
    is is instantaneous
    B.
    more heat is generated during braking
    C.
    it avoids wear of track
    D.
    motor continue to remain loaded during braking

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