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Theory of Machine - section-11
  1. In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

    2. A.

     μ₁ = μ sin β
    B.

     μ₁ = μ cos β
    C.

     μ₁ = μ/sin β
    D.

     μ₁ = μ/cos β

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  2. The lower pairs are _________ pairs.

    3. A.

     Self-closed
    B.

     Force-closed
    C.

     Friction closed
    D.

     None of these

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  3. In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

    4. A.

     Sliding
    B.

     Turning
    C.

     Rolling
    D.

     Screw

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  4. A kinematic chain is known as a mechanism when

    5. A.

     None of the links is fixed
    B.

     One of the links is fixed
    C.

     Two of the links are fixed
    D.

     None of these

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  5. A pantograph is a mechanism with

    6. A.

     Lower pairs
    B.

     Higher pairs
    C.

     Rolling pairs
    D.

     Turning pairs

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  6. In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

    7. A.

     μ₁ = μ sin β
    B.

     μ₁ = μ cos β
    C.

     μ₁ = μ/sin β
    D.

     μ₁ = μ/cos β

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  7. The lower pairs are _________ pairs.

    8. A.

     Self-closed
    B.

     Force-closed
    C.

     Friction closed
    D.

     None of these

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  8. In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

    9. A.

     Sliding
    B.

     Turning
    C.

     Rolling
    D.

     Screw

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  9. A kinematic chain is known as a mechanism when

    10. A.

     None of the links is fixed
    B.

     One of the links is fixed
    C.

     Two of the links are fixed
    D.

     None of these

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  10. A pantograph is a mechanism with

    11. A.

     Lower pairs
    B.

     Higher pairs
    C.

     Rolling pairs
    D.

     Turning pairs

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