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Mechanical Engineering :: Machine Design

  1. In a crossed belt drive, the shafts are arranged parallel and rotate in the same directions.

  2. A.

    Correct

    B.

    Incorrect

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  3. In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

  4. A.

    helix angle

    B.

    pressure angle

    C.

    pitch lead angle

    D.

    none of these

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  5. Idler pulley is used for

  6. A.

    increasing velocity ratio

    B.

    changing the direction of motion of belt

    C.

    all of these

    D.

    none of these

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  7. The bell crank levers used in railway signalling arrangement are of third type levers.

  8. A.

    True

    B.

    False

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  9. When spring index increases, the value of Wahl's stress factor

  10. A.

    increases linearly

    B.

    decreases linearly

    C.

    remains same

    D.

    increases exponentially

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