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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. In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.

    2. A.

    Correct
    B.

    Incorrect

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  2. For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.

    3. A.

    Correct
    B.

    Incorrect

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  3. Lewis equation in gears is used to find the

    4. A.

    tensile stress in bending
    B.

    shear stress
    C.

    compressive stress in bending
    D.

    fatigue stress

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  4. In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

    5. A.

    the effect of curvature of the cylinder wall is neglected
    B.

    the tensile stresses are uniformly distributed over the section of the walls
    C.

    the effect of the restraining action of the heads at the end of the pressure vessel is neglected
    D.

    all of the above

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  5. All stresses produced in a belt are

    6. A.

    compressive stresses
    B.

    tensile stresses
    C.

    both tensile and compressive stresses
    D.

    shear stresses

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