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. 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 2 / 50 2. 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 3 / 50 3. 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 4 / 50 4. *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 5 / 50 5. *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 6 / 50 6. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 7 / 50 7. *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 8 / 50 8. 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 9 / 50 9. Velocity of flow may be determined using: a) division of discharge to the area of flow b) product of area and discharge divided by 100 c) product of wetted perimeter and hydraulic radius d) all of the above 10 / 50 10. 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 11 / 50 11. The most economical section of a circular channel for the maximum discharge is when a) depth of water = 0.95 diameter of the circular section b) hydraulic mean depth = 0.286 diameter of the circular section c) wetted perimeter = 2.6 diameters of the circular section 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. *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 14 / 50 14. 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 15 / 50 15. 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 16 / 50 16. If the Froude number in open channel flow is equal to 1.0, the flow is called a) critical flow b) streaming flow c) shooting flow d) none of the above 17 / 50 17. *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 18 / 50 18. 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 19 / 50 19. *Chazy's formula is given by a) v = C√mi b) v = m√ci c) v = C√mci d) v = i√mc 20 / 50 20. *A stepped notch is a combination of a) rectangular notches of different sizes b) triangular notches of different sizes c) rectangular and triangular notches d) all of the above 21 / 50 21. 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 22 / 50 22. 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 23 / 50 23. Cavitations is collapsed by a) low pressure b) high pressure c) low velocity d) high velocity 24 / 50 24. *The magnitude of capillary rise is more in: a) silts b) sands c) clays d) gravels 25 / 50 25. 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 26 / 50 26. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is a) 0.1H b) 0.2H c) 0.3H d) 0.4H 27 / 50 27. *What affects the quantity of mass of a fluid? a) acceleration due to gravity b) distance from the center of the earth c) elevation of the body d) none of the above 28 / 50 28. ........ is defined as the maximum increase in water level in the path of the flow of water a) afflux b) rising of the wall c) flood d) rainfall 29 / 50 29. *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 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. 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 32 / 50 32. *The difference between the total energy gradient line and the total energy line is a) kinetic head b) pressure head c) datum head d) loss of head 33 / 50 33. The viscosity of gases varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 34 / 50 34. 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 35 / 50 35. 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 36 / 50 36. 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 37 / 50 37. In an open tube, the free surface of mercury remains a) horizontal b) curved upwards c) curved downwards d) none of the above 38 / 50 38. 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 39 / 50 39. *Hydraulic gradient is equal to a) difference in water surface / total length of the channel b) total loss due to friction / total length of the channel c) wetted perimeter / total length of the channel d) area of cross-section / total length of the channel 40 / 50 40. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8) a) 2.72m of oil b) 2.52m of oil c) 3.20m of oil d) 0.2m of oil 41 / 50 41. *The flow in which the path of individual particles of liquid cross each other is called a) uniform flow b) turbulent flow c) stream line flow d) none of the above 42 / 50 42. Critical depth (he) is given by (where q= rate of flow per unit width of channel) a) (q^2/g)^1/3 b) (q^2/g)^1/4 c) (q^2/g)^1/2 d) none of the above 43 / 50 43. Crest of a weir is lower than d/s water level a) submerged weir b) Cipolletti weir c) triangular weir d) sharp-crested weir 44 / 50 44. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as a) hydraulic gradient b) piezometric line c) pressure grade line d) all of the above 45 / 50 45. *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 46 / 50 46. In an inclined position, a venturimeter records a) less reading b) same reading c) more reading d) none of the above 47 / 50 47. *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 48 / 50 48. The thickness of a sharp-crested weir is kept less than a) one-third of the height of water on the sill b) one-half of the height of water on the sill c) two-thirds of the height of water on the sill d) four-thirds of the height of water on the sill 49 / 50 49. *The magnitude of water hammer depends upon a) the length of the pipeline b) elastic properties of liquid c) elastic properties of the pipe material d) diameter of the pipeline 50 / 50 50. 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 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