Home» Online Test » Civil Engineering » Hydraulics Online Test » Paper 1 » Paper 2 » Paper 3 0% Sorry, time's up. To complete the online test, please restart it. Created by Vikash chaudhary This is a FREE online test. Beware of scammers who ask for money to attend this test. Get New Questions in Each Attempt Total Questions: 50 Time Allotted: 50 minutes Passing Score: 70% Randomization: Yes Certificate: Yes Do not refresh the page! 👍 All the best! 1 / 50 1. In the case of a broad-crested weir, the depth of water h at the end of the still is given by a) h = H/2 b) h = 2H/3 c) h = 3H/4 d) h = H 2 / 50 2. *Pressure within a soap bubble is a) equal to vapor pressure b) less than external pressure c) more than external pressure d) equal to external pressure 3 / 50 3. *An ideal flow of a liquid obeys a) continuity equation b) Newton's second law of viscosity c) Newton's second law of motion d) dynamic viscosity 4 / 50 4. The discharge through a V-notch weir is directly proportional to: a) the bed slope of the channel upstream b) the depth of flow c) the top width of the notch d) the angle of the notch and the depth of the flow 5 / 50 5. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 6 / 50 6. A siphon is used a) to connect water reservoirs at different levels intervened by a hill b) to supply water to a town from a higher level to a lower level c) to fill up a tank with water at a higher level from a lower level d) none of the above 7 / 50 7. Water belongs to a) compressible fluids b) none of the above c) Newtonian fluids d) non-Newtonian fluids 8 / 50 8. The head of water representing in the case of HGL line is known as a) static head b) residual head c) pressure head d) all of the above 9 / 50 9. *The continuity equation deals with the law of conservation of a) mass b) momentum c) energy d) force 10 / 50 10. A triangular notch is preferred to a rectangular notch because a) only one reading is required b) its formula is simple to remember c) it gives more accurate results for low discharge (Q≤100m^3/sec) d) it measures a wide range of flows accurately 11 / 50 11. The term z is known as a) potential energy b) pressure energy c) potential energy per unit weight d) none of the above 12 / 50 12. The depth of flow after the hydraulic jump is a) d2 = d1/2 [√1+8(Fe)1^2 -1] b) d1 = d2/2 [√1+8(Fe)1^2 -1] c) d2 = d1/3 [√1+8(Fe)1^2 -1] d) d2 = d1/2 [√1+2(Fe)1^2 -1] 13 / 50 13. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a rectangular notch is a) 1/2 b) 2/3 c) 3/2 d) 3/4 14 / 50 14. *The difference between the total energy line and the hydraulic gradient line is a) kinetic head b) pressure head c) datum head d) loss of head 15 / 50 15. *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 a) hydraulic jump b) standing wave c) both (a) and (b) above d) water cushion 16 / 50 16. In the case of vortex flow, the level of water at the center is a) higher than circumference b) lower than circumference c) same as circumference d) all of the above 17 / 50 17. The viscosity of gases varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 18 / 50 18. 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.) a) 2σ/d b) 4σ/d c) 6σ/d d) 8σ/d 19 / 50 19. Water hammer is a phenomenon that occurs a) when pressure increases sudden closure of the valve b) when pressure decreases sudden opening of the valve c) due to the elastic material of the pipe d) due to the incompressible nature of the fluid 20 / 50 20. *The orifice used for low discharge is a) rectangular b) circular c) square d) triangular 21 / 50 21. *Which of the following statements is valid? a) a fluid with low viscosity resists motion because its molecular structure gives it a lot of internal friction b) viscosity describes the internal friction of a moving fluid c) two fluids with the same dynamic viscosities have the same kinematic viscosities irrespective of their densities d) intensity of liquid pressure at the bottom of a tank is w.g.h/3 22 / 50 22. For any channel section, the specific energy increase with a) decreases in depth of super critical flow b) increases in depth of super critical flow c) increases in depth of sub critical flow d) none of the above 23 / 50 23. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its: a) specific weight b) specific mass c) specific gravity d) none of the above 24 / 50 24. The most efficient channel section is a) semi-circular b) rectangular c) triangular d) trapezoidal 25 / 50 25. In a flowing liquid, a particle may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 26 / 50 26. *The atmospheric pressure varies with a) altitude b) temperature c) weather conditions d) none of the above 27 / 50 27. 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 a) Reynold number b) Froude number c) Weber number d) Mach number 28 / 50 28. Cavitations in flowing fluid occurs when a) the total energy suddenly increases b) the total energy suddenly decreases c) the total energy is constant d) none of the above 29 / 50 29. 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) a) 2.48 m b) 2.73 m c) 2.50 m d) 2.51 m 30 / 50 30. Specific weight of liquid a) remains constant at every place b) does not remain constant at every place c) varies from place to place d) does not vary on any other planet except earth 31 / 50 31. *Head loss increases with a) an increase in velocity b) a decrease in velocity c) a decrease in length of the pipe d) an increase in the diameter of the pipe 32 / 50 32. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is a) 1 b) 0.1 c) 0.001 d) 0.0001 33 / 50 33. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is a) 750 kg/m^3 b) 12000 kg/m^3 c) 1.33 d) 0.75 34 / 50 34. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 35 / 50 35. To avoid an interruption in the flow of a siphon, the air vessel is provided a) at the inlet b) at the outlet c) at the summit d) at the point between the inlet and outlet 36 / 50 36. *The discharge through a trapezoidal channel is maximum when a) m = d b) m = 2d c) m = 3d d) m = d/2 37 / 50 37. *The wetted perimeter of a channel is given by a) 4.75Q^2 b) 4.75Q c) 4.75√Q d) none of the above 38 / 50 38. Euler's number is the ratio of a) inertia force to pressure force b) pressure force to elastic force c) elastic force to viscous force d) viscous force to inertia force 39 / 50 39. Open channel flow is a) one in which the liquid is flowing in a conduit and has a free surface b) one in which the liquid is flowing in a closed conduit running full c) a covered channel running full d) one in which the liquid is flowing in a conduit under pressure 40 / 50 40. In an open channel flow a) the velocity distribution is symmetrical about the pipe axis b) the maximum velocity occurs at a little distance below the water surface c) flow cross-section is fixed d) the flow takes place at the expense of hydraulic pressure 41 / 50 41. Hydraulic gradient line for an open flow channel is a) below water level b) same as water level c) above water level d) all of the above 42 / 50 42. *Bernoulli's theorem deals with the law of conservation of a) energy b) all of the above c) mass d) momentum 43 / 50 43. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 44 / 50 44. Hooke's law for solids is analogous to a) Newton's law of viscosity b) Pascal's law c) Boundary layer theory d) continuity equation 45 / 50 45. With a clinging nappe of a weir, the excess discharge is a) 6% to 7% b) 8% to 10% c) 12% to 15% d) 25% to 30% 46 / 50 46. The minimum head loss will occur in a) orifice meter b) venturimeter c) nozzle meter d) none of the above 47 / 50 47. *The float method is used to measure a) the discharge in an open channel b) the velocity in an open channel c) discharge open in an open channel d) all of the above 48 / 50 48. *Capillarity of water is a) directly proportional to surface tension b) inversely proportional to the angle of contact c) inversely proportional to the diameter of the pipe d) all of the above 49 / 50 49. For uniform flow in the channel a) the total energy line, hydraulic gradient line, and the bottom of the channel are parallel b) the total energy line and water surface are horizontal, while the bottom of the channel is inclined c) total energy line, water surface, and the bottom of the channel are parallel d) none of the above 50 / 50 50. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. 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