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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. Cavitation will begin when

  2. A.

     the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid

    B.

     pressure becomes more than critical pressure

    C.

     flow is increased

    D.

     pressure is increased

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  3. Pascal-second is the unit of

  4. A.

     pressure

    B.

     kinematic viscosity

    C.

     dynamic viscosity

    D.

     surface tension

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  5. Which of the following is the unit of kinematic viscosity

  6. A.

     pascal

    B.

     poise

    C.

     stoke

    D.

     faraday

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  7. Ratio of inertia force to surface Jension is known as

  8. A.

     Mach number

    B.

     Froude number

    C.

     Reynold’s number

    D.

     Weber’s number

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  9. The ratio of absolute viscosity to mass density is known as

  10. A.

     specific viscosity

    B.

     viscosity index

    C.

     kinematic viscosity

    D.

     coefficient of viscosity

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  11. Which of the following has highest coefficient of discharge ?

  12. A.

     sharp edged orifice

    B.

     venturimeter

    C.

     Borda’s mouthpiece running full

    D.

     CipoUetti weir

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  13. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

  14. A.

     zero

    B.

     one-fourth its value when cylinder was full

    C.

     one-half its value when cylinder was full

    D.

     cannot be predicted from the given data

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  15. Stanton diagram is a

  16. A.

     log-log plot of friction factor against Reynolds number

    B.

     log-log plot of relative roughness against Reynolds number

    C.

     semi-log plot of friction factor against Reynolds number

    D.

     semi-log plot of friction factor against relative roughness

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  17. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
    i) the ball will move to the front
    ii) the bubble will move to the front
    iii) the ball will move to the rear
    iv) the bubble will move to the rear
    Find out which of the above statements are correct ?

  18. A.

     (i) and (ii)

    B.

     (i) and (iv)

    C.

     (ii) and (iii)

    D.

     (iii) and (iv)

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  19. In steady flow of a fluid, the total accele ration of any fluid particle

  20. A.

     can be zero

    B.

     is never zero

    C.

     is always zero

    D.

     is independent of coordinates

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