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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. A screw is said to be over hauling screw, if the

    2. A.

    friction angle is less than helix angle
    B.

    friction angle is more than helix angle
    C.

    friction angle is equal to helix angle
    D.

    efficiency of screw is 100%

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  2. Shaft coupling is used in machinery to

    3. A.

    introduce mechanical flexibility
    B.

    introduce protection against over loads
    C.

    reduce the transmission of shock loads
    D.

    all of these

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  3. Oldham coupling is used to connect two shafts

    4. A.

    which are perfectly aligned
    B.

    which are not in exact alignment
    C.

    which have lateral misalignmentwhose axes intersect at a small angle
    D.

    whose axes intersect at a small angle

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  4. The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

    5. A.

    obtain variable moment of inertia (I) in each leaf
    B.

    permit each leaf to act as a overhanging beam
    C.

    have variable bending moment (M) in each leaf
    D.

    make M/I constant throughout the length of the leaf

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  5. The face of the tooth is the

    6. 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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