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 fresh, 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 an open channel flow a) the hydraulic gradient line is lower than the liquid surface b) the hydraulic gradient line coincides with the liquid surface c) the hydraulic gradient line is higher than the liquid surface d) none of the above 2 / 50 2. A steady uniform flow is through a a) long pipe at decreasing rate b) long pipe at constant rate c) long pipe at increasing rate d) none of the above 3 / 50 3. *The upper surface of the weir over which water flows is known as a) crest b) notch c) top level d) none of the above 4 / 50 4. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above 5 / 50 5. *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 6 / 50 6. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is a) 2/3 b) 3/2 c) 2/5 d) 5/2 7 / 50 7. 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 8 / 50 8. 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 9 / 50 9. *Pressure head is given by a) P/w b) z c) v/2g d) all 10 / 50 10. *Capillary rise is proportional to a) surface tension b) unit weight of water c) diameter of the pipe d) none of the above 11 / 50 11. 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 12 / 50 12. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by a) Pascal b) Newton c) Archimedes d) all of the above 13 / 50 13. *Hydraulic gradient line (except siphon) a) remains above the centerline of the conduit b) remains below the centerline of the conduit c) remains parallel to the centerline of the conduit d) may be above or below the centerline of the conduit 14 / 50 14. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to a) 40 kN b) 10 kN c) 20 kN d) 30 kN 15 / 50 15. Hydraulic gradient line and total energy line are a) same b) different c) differ by pressure head d) differ by static head 16 / 50 16. *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 a) 0.0116 cm³/sec b) 0.116 cm³/sec c) 0.0160 cm³/sec d) 0.00116 cm³/sec 17 / 50 17. *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 18 / 50 18. *The notch angle for the maximum discharge over a triangular notch is a) 30° b) 60° c) 90° d) 120° 19 / 50 19. A ideal fluid a) is frictionless and incompressible b) obey Newton's law of viscosity c) is similar to gas d) is very viscous 20 / 50 20. *The floating method is used for the measurement of a) discharge b) head c) pressure d) none of the above 21 / 50 21. The viscosity of gases varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 22 / 50 22. *If a pitot tube is placed with its nose facing downstream, the liquid a) does not rise in the tube b) rises in the tube to a height √v^2/sg c) falls in the tube to a depth √v^2/2g d) none of the above 23 / 50 23. 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 24 / 50 24. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 25 / 50 25. The error 1% in measuring H will produce a a) 1% b) 1.5% c) 2% d) 2.5% 26 / 50 26. The maximum velocity in an open channel occurs a) at the bottom of the channel b) at 1/2 the depth of the channel c) slightly below the free surface d) at the free surface 27 / 50 27. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called a) uniform b) incompressible c) non-uniform d) steady 28 / 50 28. A fluid particle may possess the displacement of a) translation b) rotation c) distortion d) all of the above 29 / 50 29. *Surface float is used to measure a) pressure b) difference in pressure c) viscosity of flow d) none of the above 30 / 50 30. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 31 / 50 31. *Orifice-meter is used to measure: a) pressure at the point b) discharge c) average speed d) velocity 32 / 50 32. 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] 33 / 50 33. *Cipolletti weir is a trapezoidal weir having a side slope of a) H:V::1:2 b) H:V::2:1 c) H:V::1:4 d) none of the above 34 / 50 34. *Viscosity of a liquid a) drops with temperature b) rises with temperature c) does not vary with temperature d) remains constant up to a certain temperature 35 / 50 35. The attraction among different particles of the same material is a) adhesion b) cohesion c) corrosion d) fusion 36 / 50 36. *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 37 / 50 37. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is a) water hammer b) hydraulic jump c) critical discharge d) all of the above 38 / 50 38. *An independent mass of a fluid does not possess a) elevation energy b) kinetic energy c) pressure energy d) none of the above 39 / 50 39. In an open channels the analysis of a sugar is done by using a) continuity equation b) momentum equation c) energy equation d) none of the above 40 / 50 40. *Piezometers are used to measure a) pressure in water channels, pipes, etc. b) difference in pressure at two points c) atmospheric pressure d) very low pressure 41 / 50 41. In fluids, steady flow occurs when a) the condition of flow change steadily with time b) the condition of flow do not change with time c) the condition of flow remains the same at adjacent points d) the velocity vector remains constant at a point 42 / 50 42. Hydrostatic pressure on a dam depends upon its a) length b) depth c) shape d) both (b) and (c) of the above 43 / 50 43. *If fluid or flow parameters at any given instant remain the same at every point in space, it is called: a) steady flow b) laminar flow c) uniform flow d) rotational flow 44 / 50 44. *The imaginary line joining each head of water is called a) hydraulic gradient line b) residual line c) loss of gradient line d) none of the above 45 / 50 45. If the density of a fluid is constant from point to point in a flow region, it is called a) steady flow b) incompressible flow c) uniform flow d) rotational flow 46 / 50 46. *Bernoulli's equation assumes that a) fluid is non-viscous b) fluid is homogeneous c) flow is along the streamline d) all of the above 47 / 50 47. *The most economical section of a circular channel for the maximum velocity is when a) depth of water = 0.810 diameter b) hydraulic mean depth = 0.304 diameter of the circular section c) wetted perimeter = 2.245 diameters of the circular section d) all of the above 48 / 50 48. Mass density of liquid (p) is given by a) p = mass/volume b) p = metric slug/m^2 c) p = kgsec^3/m^4 d) all of the above 49 / 50 49. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called a) steady flow b) uniform flow c) incompressible flow d) rotational flow 50 / 50 50. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its a) specific weight b) specific mass c) specific gravity d) none of the above Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score isShare your achievement! LinkedIn Facebook 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. Send feedback Buy Hydraulics MCQ PDF for Offline Study