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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%
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1. *If the velocity of fluid particles varies from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be

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2. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

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3. Cavitations in flowing fluid occurs when

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4. *The pressure in pipe flow is normally

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

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6. *Cipolletti weir is a trapezoidal weir having a side slope of

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7. Practical fluids possess

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8. *The discharge through a trapezoidal channel is maximum when

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9. *Head loss increases with

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

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11. Super-critical flow occurs in

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12. A siphon is used

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13. *Back water curve is caused if there is a

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14. In an inclined pipe, the pressure difference at its two ends is due to

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15. To avoid an interruption in the flow of a siphon, the air vessel is provided

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16. For any channel section, the specific energy increase with

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17. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

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18. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

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19. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

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20. In an inclined position, a venturimeter records

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21. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

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22. *The hydraulic ram is a pump that works on

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23. The pressure difference between inside and outside of a droplet of water is given by (Where σ is surface tension and d is the diameter of the droplet.)

24 / 50

24. Specific weight of liquid

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25. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

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26. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

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27. If fluid or flow parameters at any given instant remain the same at every point in space, it is called:

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

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29. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

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30. Poise is the unit of

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

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32. *1 m head is equivalent to

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

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34. *The main assumption of Bernoulli's equation is

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35. *In flow, the liquid particles may possess

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36. *To measure atmospheric pressure, we use

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37. If the Froude number in open channel flow is equal to 1.0, the flow is called

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38. *Piezometers are used to measure

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39. *Rotameter is used for measuring

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40. *If fluid or flow parameters at any given instant remain the same at every point in space, it is called:

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41. *Differential manometers are used to measure

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42. Liquids

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

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44. In the case of vortex flow, the level of water at the center is

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45. *Hydraulic gradient is equal to

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46. 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

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

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48. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

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

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50. If the Froude number in open channel flow is less than 1.0, the flow is called

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