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. *The notch angle for the maximum discharge over a triangular notch is a) 30° b) 60° c) 90° d) 120° 2 / 50 2. The upward water pressure at the base of the structure is called a) up b) down c) uplist d) downlift 3 / 50 3. 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 4 / 50 4. *The discharge through a trapezoidal channel is maximum when a) half of the width = sloping side b) top width = 1/2 sloping side c) top width = 1.5 sloping side d) none of the above 5 / 50 5. The two depths at which the specific energy is the same are called a) alternate depths b) conjugate depths c) critical depths d) normal depths 6 / 50 6. *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 7 / 50 7. *The orifice used for low discharge is a) rectangular b) circular c) square d) triangular 8 / 50 8. *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 9 / 50 9. *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 10 / 50 10. 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 11 / 50 11. For a circular channel, the wetted perimeter is given by (where θ=half the angle subtended by the water at the center and R= radius of circular channel) a) 2Rθ b) 3Rθ c) 4Rθ d) all of the above 12 / 50 12. *Back water curve is caused if there is a a) friction head loss is more than the bed slope b) obstruction due to weir in the channel c) there is an increase in width of the channel d) none of the above 13 / 50 13. 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% 14 / 50 14. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 15 / 50 15. 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 16 / 50 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 a) Reynold number b) Froude number c) Weber number d) Mach number 17 / 50 17. 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 a) 0, 50 kg/m^2 b) 0, 150 kg/m^2 c) 0, 100 kg/m^2 d) 50 kg/m^2, 50 kg/m^2 18 / 50 18. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if a) the area is horizontal b) the area is vertical c) the area is inclined d) all of the above 19 / 50 19. 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 20 / 50 20. *The condition for the maximum velocity and discharge is given by (closed flow) a) 0.81D & 0.95D b) 0.82D & 0.94D c) 0.83D & 0.93D d) 0.84D & 0.92D 21 / 50 21. 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 22 / 50 22. *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 23 / 50 23. *The equation of continuity of fluids is applicable only if a) the flow is steady b) the flow is in-compressible c) the flow is one-dimensional d) all of the above 24 / 50 24. *Manometers 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 25 / 50 25. The term P/pg is known as a) kinetic energy b) pressure energy per unit weight c) kinetic energy per unit weight d) none of the above 26 / 50 26. 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 27 / 50 27. *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 28 / 50 28. *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 29 / 50 29. 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 30 / 50 30. The basic head loss in a long pipe is: a) fittings b) sudden increase in diameter c) sudden decrease in diameter d) friction 31 / 50 31. *A pitot tube is used to measure a) pressure b) different in pressure c) velocity of flow d) none of the above 32 / 50 32. A ideal fluid a) is frictionless and incompressible b) obey Newton's law of viscosity c) is similar to gas d) is very viscous 33 / 50 33. Crest of a weir is lower than d/s water level a) submerged weir b) Cipolletti weir c) triangular weir d) sharp-crested weir 34 / 50 34. *The energy possessed by a fluid by virtue of its existing pressure is called a) elevation energy b) kinetic energy c) potential energy d) all of the above 35 / 50 35. *Variation in volume of liquid with variation in pressure is called a) plasticity b) viscosity c) compressibility d) none of the above 36 / 50 36. The capillary rise or fall of the liquid is given by a) h = σ cos θ / 4ρgd b) h = 4σ cos θ / ρgd c) h = 8σ cos θ / ρgd d) none of the above 37 / 50 37. A fluid particle may possess the displacement of a) translation b) rotation c) distortion d) all of the above 38 / 50 38. 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 39 / 50 39. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 40 / 50 40. In the case of leveling by a level pipe, the level is indicated by a) upper face b) middle face c) lower face d) all of the above 41 / 50 41. Water belongs to a) compressible fluids b) none of the above c) Newtonian fluids d) non-Newtonian fluids 42 / 50 42. An intensifier is used to increase a) pressure b) temperature c) energy d) none of the above 43 / 50 43. *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 44 / 50 44. When the pipes are connected in series, the total rate of flow a) is equal to the sum of the rate of flow in each pipe b) is equal to the reciprocal of the sum of the rate of flow in each pipe c) is the same as flowing through each pipe d) none of the above 45 / 50 45. *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 46 / 50 46. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 47 / 50 47. 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 48 / 50 48. *The hydraulic radius is equal to a) area divided by the square of the wetted perimeter b) wetted area divided by the wetted perimeter c) the wetted perimeter divided by the area d) the square root of the area 49 / 50 49. 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 50 / 50 50. A siphon is an a) L-shaped pipe b) U-shaped pipe c) inverted U-shaped pipe 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