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. Cavitations is collapsed by a) low pressure b) high pressure c) low velocity d) high velocity 2 / 50 2. *The magnitude of capillary rise is more in: a) silts b) sands c) clays d) gravels 3 / 50 3. Open channel flow is a) one in which the liquid is flowing in a conduit and has a free surface b) one in which the liquid is flowing in a closed conduit running full c) a covered channel running full d) one in which the liquid is flowing in a conduit under pressure 4 / 50 4. A triangular notch is preferred to a rectangular notch because a) only one reading is required b) its formula is simple to remember c) it gives more accurate results for low discharge (Q≤100m^3/sec) d) it measures a wide range of flows accurately 5 / 50 5. The continuity equation a) expresses the relationship between work and energy b) relates the momentum per unit volume between two points on a stream line c) relates the mass rate of flow along a stream line d) requires that Newton's second law of motion be satisfied at every point in the fluid. 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. *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. Which of the following is the example of laminar flow? a) underground flow b) flow past tiny bodies c) both of (a) and (b) d) none of the above 9 / 50 9. Specific weight of sea water is more than that of pure water because of a) dissolved air b) dissolved salts c) suspended matter d) all of the above 10 / 50 10. Poise is the unit of a) mass density b) kinematic viscosity c) viscosity d) pressure gradient 11 / 50 11. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 12 / 50 12. *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 13 / 50 13. *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 14 / 50 14. *The actual velocity through an orifice is........... than the theoretical velocity. a) more b) less c) equal d) not defined 15 / 50 15. 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 16 / 50 16. Total head of a particle in motion is the sum of a) potential head and kinetic head b) kinetic head and pressure head c) potential head and pressure head d) potential head, kinetic head, and pressure head 17 / 50 17. 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 18 / 50 18. The viscosity of liquids varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 19 / 50 19. *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 20 / 50 20. 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 21 / 50 21. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called a) hydraulic jump b) standing wave c) both (a) and (b) above d) water cushion 22 / 50 22. *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 23 / 50 23. The section of the Jet leaving an orifice, having the minimum cross-section area, is called a) orifice meter b) venturimeter c) mouthpiece d) vena contracta 24 / 50 24. ........ 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 25 / 50 25. In an inclined position, a venturimeter records a) less reading b) same reading c) more reading d) none of the above 26 / 50 26. In an open tube, the free surface of mercury remains a) horizontal b) curved upwards c) curved downwards d) none of the above 27 / 50 27. *An independent mass of a fluid does not possess a) elevation energy b) kinetic energy c) pressure energy d) none of the above 28 / 50 28. *The atmospheric pressure varies with a) altitude b) temperature c) weather conditions d) none of the above 29 / 50 29. *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> 30 / 50 30. *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 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. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 33 / 50 33. *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 34 / 50 34. 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 35 / 50 35. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach Va is a) √2gh b) Q/L(H-L) c) Q/L(H+L) d) L(H+S)/Q 36 / 50 36. 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 37 / 50 37. The numerical value of vorticity is.....of the rotation a) twice b) thrice c) same d) all of the above 38 / 50 38. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as: a) submerged weir b) narrow-crested weir c) broad-crested weir d) ogee weir 39 / 50 39. Which of the following quantities are dimensionless? a) surface tension b) specific weight c) angular velocity d) Mach number 40 / 50 40. 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 41 / 50 41. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be a) minimum b) maximum c) average d) critical 42 / 50 42. *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 43 / 50 43. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 44 / 50 44. *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 45 / 50 45. *Pressure head is given by a) P/w b) z c) v/2g d) all 46 / 50 46. *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 47 / 50 47. *The floating method is used for the measurement of a) discharge b) head c) pressure d) none of the above 48 / 50 48. *Water cushion is used to a) sit in the house b) destroy the energy c) produce energy d) none of the above 49 / 50 49. In the case of vortex flow, the level of water at the center is a) higher than circumference b) lower than circumference c) same as circumference d) all of the above 50 / 50 50. The water immediately downstream of the conduit or weir is called a) head water b) tail water c) main water d) surplus water 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