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Hydraulics Online Test – Paper 3

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Created by 83a36dcfd5c4caff12bc80f0020c9c749e12cbbbdb7c406dc1dd39996cb85836?s=32&d=monsterid&r=g gkaimVikash chaudhary

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  • Total Questions: 50
  • Time Allotted: 50 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
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1. Mouthpieces are used to measure

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2. Which of the following quantities are dimensionless?

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3. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

4 / 50

4. *Head loss increases with

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5. For a long pipe, the head loss

6 / 50

6. In the case of a broad-crested weir, the depth of water h at the end of the still is given by

7 / 50

7. Discharge over an ogee weir remains the same as that of

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8. One horsepower is equal to

9 / 50

9. The section of the Jet leaving an orifice, having the minimum cross-section area, is called

10 / 50

10. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

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11. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

12 / 50

12. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

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13. For a circular channel, the wetted perimeter is given by (where θ=half the angle subtended by the water at the center and R= radius of circular channel)

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14. Poise is the unit of

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15. Liquids

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16. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

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17. Chazy's formula is used to determine

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18. The ratio of the mean velocity to the surface velocity in open channels is equal to

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19. Falling drops of water become spheres due to

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20. If the specific gravity of oil is 0.7, then find the density of oil

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21. Water hammer is a phenomenon that occurs

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22. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

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23. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a rectangular notch is

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24. *Orifice-meter is used to measure:

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25. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called

26 / 50

26. *In flow, the liquid particles may possess

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27. *A stepped notch is a combination of

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28. *The term v^2/2g is known as

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29. The basic head loss in a long pipe is:

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30. *The imaginary line joining each head of water is called

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31. If the density of a fluid changes from point to point in a flow region, it is called

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32. *The most economical section of a circular channel for the maximum velocity is when

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33. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and Cd = 0.035 is

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34. Specific weight of sea water is more than that of pure water because of

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35. Practical fluids possess

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36. *Stoke is the unit of

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37. *An orifice is called a large orifice if the water head is

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38. Critical depth (he) is given by (where q= rate of flow per unit width of channel)

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39. Super-critical flow occurs in

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40. *A pitot tube is used to measure

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41. *To measure atmospheric pressure, we use

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42. *The actual velocity through an orifice is........... than the theoretical velocity.

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43. *The notch angle for the maximum discharge over a triangular notch is

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44. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is

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45. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach Va is

46 / 50

46. *The rate of flow through a V-notch varies as:

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47. *The magnitude of capillary rise is more in:

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48. The viscosity of liquids varies with temperature

49 / 50

49. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

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50. *Pressure within a soap bubble is

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