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Mechanical Engineering :: Machine Design

Machine Design - Section 1
Machine Design - Section 2
Machine Design - Section 3
Machine Design - Section 4
Machine Design - Section 5
Machine Design - Section 6
Machine Design - Section 7
Machine Design - Section 8

  1. Which one of the following is a positive drive?

    2. A.

    Crossed flat belt drive
    B.

    Rope drive
    C.

    V-belt drive
    D.

    Chain drive

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  2. Two closely coiled helical springs with stiffnesses k1 and k2 respectively are connected in series. The stiffness of an equivalent spring is given by

    3. A.

    \(\frac { k_1 k_2} {k_1 + k_2 }\)
    B.

    \(\frac { k_1 - k_2} {k_1 + k_2 }\)
    C.

    \(\frac { k_1 + k_2} {k_1 k_2 }\)
    D.

    \(\frac { k_1 - k_2} {k_1 k_2 }\)

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  3. The period during which the cam follower remains at rest, when cam moves, is known as

    4. A.

    constant period
    B.

    fixed period
    C.

    dwell period
    D.

    idle period

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  4. The flank of the tooth is the

    5. A.

    surface of the top of the tooth
    B.

    surface of the tooth above the pitch surface
    C.

    surface of the tooth below the pitch surface
    D.

    width of the tooth measured along the pitch circle

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  5. The included angle for the British Association thread is

    6. A.

    29°
    B.

    47.3°
    C.

    55°
    D.

    60°

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