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. *A flow is said to be laminar when a) the fluid particles move in a zig-zag way b) the Reynolds number is high c) the fluid particles move in layers parallel to the boundary d) none of the above 2 / 50 2. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 3 / 50 3. *Pascal's law states that pressure at a point is equal in all directions a) in a liquid at rest b) in a fluid at rest c) in a laminar flow d) in a turbulent flow 4 / 50 4. 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 5 / 50 5. *The pressure in pipe flow is normally a) less than atmospheric pressure b) equal to atmospheric pressure c) more than atmospheric pressure d) none of the above 6 / 50 6. When the fluid is at rest, the shear stress is a) maximum b) zero c) unpredictable d) none of the above 7 / 50 7. 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 8 / 50 8. *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 9 / 50 9. 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 10 / 50 10. *The main assumption of Bernoulli's equation is a) the velocity of energy of liquid particles across any cross-section of a pipe is uniform b) no external force except gravity acts on the liquid c) there is no loss of energy of the liquid while flowing d) all of the above 11 / 50 11. *The specific weight of water 1000 kg/m^3 a) at normal pressure of 760 mm b) at 4°C temperature c) at mean sea level d) all of the above 12 / 50 12. 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 13 / 50 13. *Total energy line (T.E.L) represents the sum of a) pressure head and kinetic head b) kinetic head and datum head c) pressure head and datum head d) pressure head, kinetic head, and datum head 14 / 50 14. A siphon is an a) L-shaped pipe b) U-shaped pipe c) inverted U-shaped pipe d) all of the above 15 / 50 15. Specific energy of a flowing fluid per unit weight is equal to a) (v^2/2g) + h b) (h^2/2g) + v c) (v^2/2h) + g d) (v^2/3g) + h 16 / 50 16. 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 17 / 50 17. Reynolds number is the ratio of initial force and a) viscosity b) elasticity c) gravitational force d) surface tension 18 / 50 18. *Bernoulli's theorem deals with the law of conservation of a) energy b) all of the above c) mass d) momentum 19 / 50 19. *To measure atmospheric pressure, we use a) barometers b) piezometer c) manometers d) differential manometers 20 / 50 20. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called a) uniform b) compressible c) unsteady d) incompressible 21 / 50 21. Mach number is the ratio of inertia force to a) viscosity b) Froude number c) gravitational force d) elasticity 22 / 50 22. 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 23 / 50 23. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called a) steady b) uniform c) compressible d) laminar 24 / 50 24. 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 25 / 50 25. 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 26 / 50 26. If the Froude number in open channel flow is more than 1.0, the flow is called a) critical flow b) streaming flow c) shooting flow d) none of the above 27 / 50 27. The total energy of a liquid in motion is equal to: a) pressure energy + kinetic energy + potential energy b) pressure energy - (kinetic energy + potential energy) c) potential energy - (pressure energy + kinetic energy) d) kinetic energy - (pressure energy + potential energy) 28 / 50 28. *The types of instrument used to measure low pressure with accuracy is a) piezometer b) barometer c) micro manometer d) mechanical gauge 29 / 50 29. 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 30 / 50 30. In a flowing liquid, a particle may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 31 / 50 31. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 32 / 50 32. *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 33 / 50 33. *Chazy's formula is given by a) v = C√mi b) v = m√ci c) v = C√mci d) v = i√mc 34 / 50 34. 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 35 / 50 35. In a venturimeter, the divergent cone is kept a) shorter than the convergent cone b) longer than the convergent cone c) equal to the convergent cone d) none of the above 36 / 50 36. *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 37 / 50 37. 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 38 / 50 38. A substance which deforms continuously under the action of shear stress is called a) fluid b) liquid c) solid d) gas 39 / 50 39. *The upper surface of the notch over which water flows is known as a) vein b) nappe c) sill d) none of the above 40 / 50 40. Which of the following quantities are dimensionless? a) surface tension b) specific weight c) angular velocity d) Mach number 41 / 50 41. The profile of rising water on the upstream side of the dam is called a) back water curve b) forwater curve c) normal water curve d) all of the above 42 / 50 42. A fluid particle may possess the displacement of a) translation b) rotation c) distortion d) all of the above 43 / 50 43. *The atmospheric pressure varies with a) altitude b) temperature c) weather conditions d) none of the above 44 / 50 44. Hydraulic gradient line and total energy line are a) same b) different c) differ by pressure head d) differ by static head 45 / 50 45. *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 46 / 50 46. *Water cushion is used to a) sit in the house b) destroy the energy c) produce energy d) none of the above 47 / 50 47. *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 48 / 50 48. Flow in pipes is turbulent if the Reynolds number is a) less than 2100 b) more than 3000 c) between 2100 and 3000 d) none of the above 49 / 50 49. The Manning's formula for flow in an open channel is given by a) v = n R^2/3 S^1/2 b) none of the above c) v = 1/n R^2/3 S^1/2 d) v = 1/n R^1/2 S^2/3 50 / 50 50. *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 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