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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


  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


  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


  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


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

  10. A.

    elastic strength

    B.

    yield strength

    C.

    brinell hardness number

    D.

    toughness