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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. Hydrometer is used to determine

  2. A.

     specific gravity of liquids

    B.

     specific gravity of solids

    C.

     specific gravity of gases

    D.

     relative humidity

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  3. The units of dynamic or absolute viscosity are

  4. A.

     metres² per sec

    B.

     kg sec/meter

    C.

     newton-sec per meter

    D.

     newton-sec² per meter

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  5. Newton’s law of viscosity relates

  6. A.

     intensity of pressure and rate of angular deformation

    B.

     shear stress and rate of angular deformation

    C.

     shear stress, viscosity and temperature

    D.

     viscosity and rate of angular deformation

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  7. A pressure of 25 m of head of water is equal to

  8. A.

     25 kN/m2

    B.

     245 kN/m2

    C.

     2500 kN/m2

    D.

     2.5 kN/m2

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  9. The pressure at a point in a fluid will not be same in all the directions when the fluid is

  10. A.

     moving

    B.

     viscous

    C.

     inviscous and moving

    D.

     viscous and moving.

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  11. Choose the wrong statement

  12. A.

     any weight, floating or immersed in a liquid, is acted upon by a buoyant force

    B.

     Buoyant force is equal to the weight of the liquid displaced

    C.

     The point through which buoyant force acts, is called the center of buoyancy

    D.

     Center of buoyancy is located above the center of gravity of the displaced liquid v

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  13. When an ideal fluid flows past a sphere

  14. A.

     highest intensity of pressure occurs around the circumference at right angles to flow

    B.

     lowest pressure intensity occurs at front stagnation point

    C.

     lowest pressure intensity occurs at rear stagnation point

    D.

     total drag is zero

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  15. The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to

  16. A.

     0.1

    B.

     0.01

    C.

     0.001

    D.

     0.0001

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  17. Coefficient of velocity of venturimeter

  18. A.

     is independent of Reynolds number

    B.

     decreases with higher Reynolds number

    C.

     is equal to the coefficient of discharge of venturimeter

    D.

     none of the above

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  19. A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

  20. A.

     4 minutes

    B.

     4 x (225)3/2 minutes

    C.

     4 (225)1/3 minutes

    D.

     4 x V225 minutes

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