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Civil Engineering :: Applied Mechanics and Graphic Statics

  1. If the given forces P₁, P₂, P₃ and P₄ are such that the force polygon does not close, then the system will

  2. A.

     Be in equilibrium

    B.

     Always reduce to a resultant force

    C.

     Always reduce to a couple

    D.

     Both (A) and (C)

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  3. A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is

  4. A.

     3/4

    B.

     4/5

    C.

     5/3

    D.

     3/5

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  5. A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is

  6. A.

     1/4

    B.

     1/3

    C.

     3

    D.

     4

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  7. The length of a Second's pendulum, is

  8. A.

     99.0 cm

    B.

     99.4 cm

    C.

     100 cm

    D.

     101 cm

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  9. For a simple pendulum, the period of one oscillation is

  10. A.

     2π √(l/2g)

    B.

     2π √(2g/l)

    C.

     2π √(l/g)

    D.

     2π √(g/2l)

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  11. The locus of the instantaneous centre of a moving rigid body, is

  12. A.

     Straight line

    B.

     Involute

    C.

     Centroid

    D.

     Spiral

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  13. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is

  14. A.

     Weight

    B.

     Mass

    C.

     Inertia

    D.

     Momentum

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  15. Engineer's units of force, is

  16. A.

     Newton in absolute units

    B.

     Dyne in absolute units

    C.

     Newton and dyne in absolute units

    D.

     All the above

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  17. If y is force and x is velocity, then dimensions of —=r are dx2

  18. A.

     M’^T’

    B.

     M’L-‘T0

    C.

     M’L-‘T1

    D.

     M2L’T3

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  19. The moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter is 6 cm, about centroidal axis, is

  20. A.

     437.5 cm⁴

    B.

     337.5 cm⁴

    C.

     237.5 cm⁴

    D.

     137.5 cm⁴

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