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Mechanical Engineering :: Engineering Mechanics

  1. The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is

  2. A.

    mr2/2

    B.

    mr2/4

    C.

    mr2/6

    D.

    mr2/8


  3. In a screw jack, the effort required to lift the load is given by(where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

  4. A.

    P = W tan (α - φ)

    B.

    P = W tan (α + φ)

    C.

    P = W tan (φ - α)

    D.

    P = W cos (α + φ)


  5. The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.

  6. A.

    Correct

    B.

    Incorrect


  7. A couple produces

  8. A.

    translatory motion

    B.

    rotational motion

    C.

    combined translatory and rotational motion

    D.

    none of the above


  9. Energy may be defined as the capacity of doing work.

  10. A.

    Correct

    B.

    Incorrect