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  • Question
  • A jet projected at an angle of 45?, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is


  • Options
  • A. 15 m
  • B. 20 m
  • C. 30 m
  • D. 40 m
  • E. 60 m.

  • Correct Answer
  • 40 m 


  • Hydraulics problems


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    • 1. For pipes not running full, the hydraulic mean depth is given by

    • Options
    • A. m = r(? - sin ?)
    • B.
    • C.
    • D.
    • Discuss
    • 2. Pick up the correct statement from the following :

    • Options
    • A. When the length of the tube is equal to diameter of the internal mouth piece, the jet of liquid comes out without touching the sides of the tube
    • B. When the length of the tube is three times the diameter of the internal mouth piece, the jet diameter is equal to diameter of the tube.
    • C. both (a) and (b)
    • D. Neither (a) nor (b).
    • Discuss
    • 3. Flow in pipes is turbulent if Reynold number is

    • Options
    • A. less than 2100
    • B. more than 3000
    • C. between 2100 and 3000
    • D. none of these.
    • Discuss
    • 4. An ideal fluid is

    • Options
    • A. incompressible
    • B. compressible
    • C. compressible and non-viscous
    • D. slightly affected by surface torque.
    • Discuss
    • 5. In Newton's viscosity equation , the coefficient (?) is known as coefficient of

    • Options
    • A. viscosity
    • B. absolute viscosity
    • C. dynamic viscosity
    • D. simple viscosity
    • E. all the above.
    • Discuss
    • 6. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than

    • Options
    • A. 2.4 m
    • B. 6.4 m
    • C. 10.0 m
    • D. 5.0 m.
    • Discuss
    • 7. Atmospheric pressure varies with

    • Options
    • A. altitude
    • B. temperature
    • C. weather conditions
    • D. all of the above.
    • Discuss
    • 8. Molecules of fluids get attracted due to

    • Options
    • A. capillarity action
    • B. surface tension
    • C. adhesion
    • D. cohesion
    • E. none of these.
    • Discuss
    • 9. Atmospheric pressure is equal to water column head of

    • Options
    • A. 9.81 m
    • B. 5.0 m
    • C. 10.30 m
    • D. 7.5 m.
    • Discuss
    • 10. Which one of the following statements is true?

    • Options
    • A. The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06
    • B. The value of kinetic energy correction factor for laminar flow is 2
    • C. The practical value of kinetic energy correction factor for turbulent flow is unity
    • D. all the above.
    • Discuss


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