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. 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 2 / 50 2. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called a) unsteady flow b) compressible flow c) rotational flow d) none of the above 3 / 50 3. 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 a) Euler number b) Froude number c) Weber number d) Reynolds number 4 / 50 4. If the density of a fluid changes from point to point in a flow region, it is called a) steady flow b) unsteady flow c) non-uniform flow d) compressible flow 5 / 50 5. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 6 / 50 6. Discharge over an ogee weir remains the same as that of a) sharp-crested weir b) triangular weir c) Cipolleti weir d) drowned weir 7 / 50 7. *Bernoulli's theorem deals with the law of conservation of a) energy b) all of the above c) mass d) momentum 8 / 50 8. *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 9 / 50 9. *Hydraulic gradient line (H.G.L.) represents the sum of a) pressure head and kinetic head b) kinetic head and datum head c) pressure head, kinetic head, and datum head d) pressure head and datum head 10 / 50 10. *The continuity equation deals with the law of conservation of a) mass b) momentum c) energy d) force 11 / 50 11. *The rate of flow through a V-notch varies as: a) H b) H<sup>1/2</sup> c) H<sup>3/2</sup> d) H<sup>5/2</sup> 12 / 50 12. *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 13 / 50 13. 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. a) 0.393 cm rise b) 0.393 cm fall c) neither fall nor rise d) all of the above 14 / 50 14. The ratio of the mean velocity to the surface velocity in open channels is equal to a) 0.55 b) 0.75 c) 0.88 d) 1.75 15 / 50 15. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 16 / 50 16. Crest of a weir is lower than d/s water level a) submerged weir b) Cipolletti weir c) triangular weir d) sharp-crested weir 17 / 50 17. 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 18 / 50 18. *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 a) laminar b) turbulent flow c) uniform flow d) non-uniform flow 19 / 50 19. *Surface tension is the force a) per unit length b) per unit area c) per unit volume d) all of the above 20 / 50 20. Liquids a) cannot be compressed b) do not occupy definite shape c) are not affected by change in pressure and temperature d) none of the above 21 / 50 21. *To measure atmospheric pressure, we use a) barometers b) piezometer c) manometers d) differential manometers 22 / 50 22. *The discharge through a rectangular channel is maximum when a) m = d/2 b) d=b/2 c) m=2d d) both (a) and (b) above 23 / 50 23. *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 24 / 50 24. 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 25 / 50 25. The viscosity of liquids varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 26 / 50 26. *A pitot tube is used to measure a) pressure b) different in pressure c) velocity of flow d) none of the above 27 / 50 27. *The types of instrument used to measure low pressure with accuracy is a) piezometer b) barometer c) micro manometer d) mechanical gauge 28 / 50 28. *Orifice-meter is used to measure: a) pressure at the point b) discharge c) average speed d) velocity 29 / 50 29. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above 30 / 50 30. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 31 / 50 31. *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 32 / 50 32. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to a) radius b) (radius)^2 c) (radius)^3 d) (radius)^4 33 / 50 33. If the Froude number in open channel flow is less than 1.0, the flow is called a) critical flow b) super-critical flow c) sub-critical flow d) none of the above 34 / 50 34. *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 35 / 50 35. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation a) h_f = 4fLV^2/2gd b) h_f = fLV^2/2gd c) h_f = 0.5V^2 / 2g d) h_f = (v_1-v_2)^2 / 2g 36 / 50 36. The flow in which each liquid particle has a definite path is called a) stream line flow b) uniform flow c) steady flow d) turbulent flow 37 / 50 37. *Capillary rise is proportional to a) surface tension b) unit weight of water c) diameter of the pipe d) none of the above 38 / 50 38. *Venturimeter is used to measure a) rate of flow b) velocity c) depth of flow d) all of the above 39 / 50 39. Mouthpieces are used to measure a) velocity b) pressure c) head d) rate of flow 40 / 50 40. 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 a) path line b) stream line c) potential line d) streak line 41 / 50 41. If the specific gravity of oil is 0.7, then find the density of oil a) 1000 kg/cm^3 b) 900 kg/cm^3 c) 800 kg/cm^3 d) 700 kg/cm^3 42 / 50 42. *The notch angle for the maximum discharge over a triangular notch is a) 30° b) 60° c) 90° d) 120° 43 / 50 43. *Chazy's formula is given by a) v = C√mi b) v = m√ci c) v = C√mci d) v = i√mc 44 / 50 44. The minimum head loss will occur in a) orifice meter b) venturimeter c) nozzle meter d) none of the above 45 / 50 45. An intensifier is used to increase a) pressure b) temperature c) energy d) none of the above 46 / 50 46. 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 47 / 50 47. *Barometers 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 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. 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 50 / 50 50. 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 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. Send feedback Buy Hydraulics MCQ PDF for Offline Study