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Mechanical Engineering :: Engineering Mechanics

  1. If the body falls freely under gravity, then the gravitational acceleration is taken as

  2. A.

    +8.9 m/s2

    B.

    -8.9 m/s2

    C.

    +9.8 m/s2

    D.

    -9.8 m/s2

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  3.  A framed structure, as shown in the below figure, is a 

     

  4. A.

    perfect frame

    B.

    deficient frame

    C.

    redundant frame

    D.

    none of the above

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  5. The rate of change of displacement of a body is called

  6. A.

    velocity

    B.

    acceleration

    C.

    momentum

    D.

    none of these

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  7. The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.)

  8. A.

    α = 45° + φ/2

    B.

    α = 45° - φ/2

    C.

    α = 90° + φ

    D.

    α = 90° - φ

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  9. The periodic time (T) is given by(where ω = Angular velocity of particle in rad / s.)

  10. A.

    ω/2π

    B.

    2π/ω

    C.

    2π x ω

    D.

    π/ω

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