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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

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  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.

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  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.

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  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.

    \(\sqrt{ p^2+Q^2+2PQ sinθ}\)

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  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.

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  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.

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  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.

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  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.

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  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.

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  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.

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