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Civil Engineering :: Applied Mechanics

  1. If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be

  2. A.

    1

    B.

    2

    C.

    3

    D.

    4

    E.

    5


  3. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through

  4. A.

    0.02 m

    B.

    2 m

    C.

    2.5 m

    D.

    20 m.


  5. When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

  6. A.

    imaginary work

    B.

    negative work

    C.
    virtual work
    D.

    none of these.


  7. The resultant of two forces P and Q acting at an angle θ, is

  8. A.

    P2 + Q2 + 2P sin θ

    B.

    P2 + Q2 + 2PQ cos θ

    C.

    P2 + Q2 + 2PQ tan θ

    D.

    \(\sqrt{ p^2+Q^2+2PQ COSθ}\)

    E.

    \(\sqrt{ p^2+Q^2+2PQ sinθ}\)


  9. To attain the synchronous orbit, the launch of a satellite, is done from a place

  10. A.

    on equator

    B.
    on 30° latitude
    C.

    on 45° latitude

    D.

    on 60° latitude

    E.

    on the poles.


  11. The vertical reaction at the support A of the structure shown in below figure, is

  12. A.

    t

    B.
    t
    C.

    t

    D.

    2.5 t.


  13. Pick up the correct statement from the following :

  14. A.

    Nature plays an important role in the launch of a satellite

    B.

    The earth's gravity reduces the speed of a satellite by 32 km per second

    C.

    The gravitational force relents as the satellite climbs higher

    D.

    The gravitational intensity declines with height

    E.

    All the above.


  15. If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is

  16. A.

    500 metres

    B.

    1000 metres

    C.

    1500 metres

    D.

    2000 metres

    E.

    25000 metres.


  17. The total time of collision and restitution of two bodies, is called

  18. A.

    time of collision

    B.

    period of collision

    C.

    period of impact

    D.
    all the above.

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

  20. A.
    99.0 cm
    B.

    99.4 cm

    C.

    100 cm

    D.

    101 cm

    E.

    101.10 cm.