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Mechanical Engineering :: Machine Design

  1. The constant factor in case of R10 series of preferred numbers is

  2. A.

    1.06

    B.

    1.12

    C.

    1.26

    D.

    1.58

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  3. The pipe joint mostly used for pipes carrying water at low pressures is

  4. A.

    socket joint

    B.

    nipple joint

    C.

    union joint

    D.

    spigot and socket joint

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  5. According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.

  6. A.

    True

    B.

    False

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  7. For maximum power, the velocity of the belt will be

  8. A.

    \(\sqrt{\frac{T}{m}}\)

    B.

    \(\sqrt{\frac{T}{2 m}}\)

    C.

    \(\sqrt{\frac{T}{ 3 m}}\)

    D.

    none of these

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  9. Surface endurance limit of gear material is dependent upon its

  10. A.

    elastic strength

    B.

    yield strength

    C.

    brinell hardness number

    D.

    toughness

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