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Mechanical Engineering :: Machine Design

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Machine Design - Section 6
Machine Design - Section 7
Machine Design - Section 8

  1. The working of metals above the recrystallisation temperature is known as hot working.

    2. A.

    True
    B.

    False

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  2. In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)

    3. A.

    \(\frac { T_1 } { T_2 } = \mu \theta \times n\)
    B.

    \(\frac { T_1 } { T_2 } = (\mu \theta) ^n\)
    C.

    \(\frac { T_1 } { T_2 } = (\frac {1 - \mu tan \theta}{ 1 + \mu tan \theta})^n\)
    D.

    \(\frac { T_1 } { T_2 } = (\frac {1 + \mu tan \theta}{ 1 - \mu tan \theta})^n\)

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  3. The ratio of number of teeth to the pitch circle diameter in millimetres is called circular pitch.

    4. A.

    Agree
    B.

    Disagree

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  4. The washer is generally specified by its

    5. A.

    outer diameter
    B.

    hole diameter
    C.

    thickness
    D.

    mean diameter

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  5. The taper on key is given on

    6. A.

    bottom side only
    B.

    top side only
    C.

    on both sides
    D.

    any side

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