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. When the fluid is at rest, the shear stress is a) maximum b) zero c) unpredictable d) none of the above 2 / 50 2. *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 3 / 50 3. *Bernoulli's theorem deals with the law of conservation of a) energy b) all of the above c) mass d) momentum 4 / 50 4. *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 5 / 50 5. The error 1% in measuring H will produce a a) 1% b) 1.5% c) 2% d) 2.5% 6 / 50 6. *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 7 / 50 7. *Capillary rise is proportional to a) surface tension b) unit weight of water c) diameter of the pipe d) none of the above 8 / 50 8. 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 9 / 50 9. 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 10 / 50 10. *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 11 / 50 11. 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 12 / 50 12. *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 13 / 50 13. *Cipolletti weir is a trapezoidal weir having a side slope of a) H:V::1:2 b) H:V::2:1 c) H:V::1:4 d) none of the above 14 / 50 14. The basic head loss in a long pipe is: a) fittings b) sudden increase in diameter c) sudden decrease in diameter d) friction 15 / 50 15. *To measure very low pressure, we use: a) barometers b) piezometers c) monometers d) differential manometers 16 / 50 16. *Losses are more in a) laminar flow b) critical flow c) turbulent flow d) transition flow 17 / 50 17. 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 18 / 50 18. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 19 / 50 19. The water immediately downstream of the conduit or weir is called a) head water b) tail water c) main water d) surplus water 20 / 50 20. 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 21 / 50 21. 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 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. Water hammer is a phenomenon that occurs a) when pressure increases sudden closure of the valve b) when pressure decreases sudden opening of the valve c) due to the elastic material of the pipe d) due to the incompressible nature of the fluid 24 / 50 24. Discharge over an ogee weir remains the same as that of a) sharp-crested weir b) triangular weir c) Cipolleti weir d) drowned weir 25 / 50 25. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above 26 / 50 26. *The difference between the total energy line and the hydraulic gradient line is a) kinetic head b) pressure head c) datum head d) loss of head 27 / 50 27. 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 28 / 50 28. *Piezometers 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 29 / 50 29. 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 30 / 50 30. 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 31 / 50 31. *Surface float is used to measure a) pressure b) difference in pressure c) viscosity of flow d) none of the above 32 / 50 32. 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 33 / 50 33. When the pipes are connected in parallel, the total loss of head a) is equal to the sum of the loss of head in each pipe b) is the same as in each pipe c) is equal to the reciprocal of the sum of the loss of head in each pipe d) none of the above 34 / 50 34. *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 35 / 50 35. *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 36 / 50 36. 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 37 / 50 37. 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 38 / 50 38. *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 39 / 50 39. Cavitations in flowing fluid occurs when a) the total energy suddenly increases b) the total energy suddenly decreases c) the total energy is constant d) none of the above 40 / 50 40. For the laminar flow through a circular pipe, the maximum velocity is a) the maximum velocity=1.5 times the average velocity b) the maximum velocity=2.0 times the average velocity c) the maximum velocity=2.5 times the average velocity d) none of the above 41 / 50 41. 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 42 / 50 42. 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 43 / 50 43. "Maximum efficiency of power transmission through a pipe is a) 50% b) 60% c) 66% d) 76% 44 / 50 44. *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 45 / 50 45. *The actual velocity through an orifice is........... than the theoretical velocity. a) more b) less c) equal d) not defined 46 / 50 46. *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 47 / 50 47. In an open channel flow a) the hydraulic gradient line is lower than the liquid surface b) the hydraulic gradient line coincides with the liquid surface c) the hydraulic gradient line is higher than the liquid surface d) none of the above 48 / 50 48. *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 49 / 50 49. 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 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 isShare your achievement! LinkedIn Facebook 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. 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