# Hydraulics Online Test – Paper 2

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Created by Vikash chaudhary

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• Total Questions: 30
• Time Allotted: 30 minutes
• Passing Score: 50%
• Randomization: Yes
• Certificate: No
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1. The depth of flow at which the specific energy is minimum is called

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2. The Manning's formula for flow in an open channel is given by

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3. A siphon is used

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4. In an open channel flow

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5. *The hydraulic radius is equal to

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6. *Surface float is used to measure

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7. The profile of rising water on the upstream side of the dam is called

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8. Cavitations is collapsed by

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9. A substance which deforms continuously under the action of shear stress is called

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10. Weber number is the ratio of inertia force to

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11. Mass density of liquid (p) is given by

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12. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

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13. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called

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

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15. 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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16. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of channels is made by comparing

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17. The maximum velocity in an open channel occurs

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

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

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

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21. For uniform flow in the channel

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22. The minimum head loss will occur in

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23. 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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24. *If a pitot tube is placed with its nose facing downstream, the liquid

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25. *Hydraulic gradient is equal to

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26. The numerical value of vorticity is.....of the rotation

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27. The error 1% in measuring H will produce a

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28. Which of the following has the highest coefficient of discharge:

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29. *If a pitot tube is placed with its nose facing sideways, the liquid

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30. The capillary rise or fall of the liquid is given by

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