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Mechanical Engineering :: Machine Design

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

  1. A bolt is designed on the basis of __________ with a large factor of safety.

    2. A.

    direct tensile stress
    B.

    direct compressive stress
    C.

    direct bending stress
    D.

    direct shear stress

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  2. Creep in belt is due to

    3. A.

    material of the belt
    B.

    material of the pulley
    C.

    uneven extensions and contractions due to varying tension
    D.

    all of the above

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  3. The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

    4. A.

    12
    B.

    14
    C.

    18
    D.

    24

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  4. A bolt of M 24 x 2 means that

    5. A.

    the pitch of the thread is 24 mm and depth is 2 mm
    B.

    cross-sectional area of the threads is 24 mm2
    C.

    the nominal diameter of bolt is 24 mm and pitch is 2 mm
    D.

    the effective diameter of bolt is 24 mm and there are 2 threads per cm

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  5. In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)

    6. A.

    d + 17 mm
    B.

    2 d + 13 mm
    C.

    2 d + 20 mm
    D.

    3.5 d

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