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 inlet length of a venturimeter a) is equal to the outlet length b) is more than the outlet length c) is less than the outlet length d) none of the above 2 / 50 2. If the density of a fluid changes from point to point in a flow region, it is called a) steady flow b) unsteady flow c) non-uniform flow d) compressible flow 3 / 50 3. In an open tube, the free surface of mercury remains a) horizontal b) curved upwards c) curved downwards d) none of the above 4 / 50 4. *Venturimeter is used to measure a) rate of flow b) velocity c) depth of flow d) all of the above 5 / 50 5. *To measure atmospheric pressure, we use a) barometers b) piezometer c) manometers d) differential manometers 6 / 50 6. *Bernoulli's equation is applied to a) venturimeter b) orifice meter c) pitot tube d) all of the above 7 / 50 7. 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 8 / 50 8. 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 9 / 50 9. 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 10 / 50 10. 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 11 / 50 11. 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 12 / 50 12. Cavitations is collapsed by a) low pressure b) high pressure c) low velocity d) high velocity 13 / 50 13. 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 14 / 50 14. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 15 / 50 15. Practical fluids possess a) viscosity b) surface tension c) compressibility d) all of the above 16 / 50 16. *Surface tension is the force a) per unit length b) per unit area c) per unit volume d) all of the above 17 / 50 17. 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 18 / 50 18. Which of the following has the highest coefficient of discharge: a) sharp-edged orifice b) venturimeter c) cipolleti weir d) borda's mouthpiece running full 19 / 50 19. 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 20 / 50 20. *The upper surface of the weir over which water flows is known as: a) vein b) nappe c) sill d) none of the above 21 / 50 21. 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 22 / 50 22. *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 23 / 50 23. *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 24 / 50 24. "Manning's formula is used for a) flow in open channels b) head loss due to friction in open channels c) head loss due to friction in pipes flowing full d) flow in pipes 25 / 50 25. 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 26 / 50 26. *A pitot tube is used to measure a) pressure b) different in pressure c) velocity of flow d) none of the above 27 / 50 27. *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 28 / 50 28. 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 29 / 50 29. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 30 / 50 30. *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 31 / 50 31. 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 32 / 50 32. *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 33 / 50 33. 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. 34 / 50 34. *Uniform flow is said to occur when a) the size and shape of the cross-section in a particular length remain constant b) the size and shape of the cross-section change along a length c) the frictional loss in the particular length of the channel will be more than the drop in elevation d) the frictional loss in the particular length of the channel will be less than the drop in elevation 35 / 50 35. Water belongs to a) compressible fluids b) none of the above c) Newtonian fluids d) non-Newtonian fluids 36 / 50 36. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is a) water hammer b) hydraulic jump c) critical discharge d) all of the above 37 / 50 37. *The atmospheric pressure varies with a) altitude b) temperature c) weather conditions d) none of the above 38 / 50 38. 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 39 / 50 39. *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 40 / 50 40. For a long pipe, the head loss a) at the entrance is ignored b) at the outlet is ignored c) at the entrance and outlet both are ignored d) due to friction is ignored 41 / 50 41. Crest of a weir is lower than d/s water level a) submerged weir b) Cipolletti weir c) triangular weir d) sharp-crested weir 42 / 50 42. *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 43 / 50 43. 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 44 / 50 44. 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 45 / 50 45. *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 46 / 50 46. 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 47 / 50 47. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called a) Euler number b) Froude number c) Reynolds number d) Weber number 48 / 50 48. 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 49 / 50 49. For the same specific force, the two depths at which the same discharge occurs are called a) alternate depths b) conjugate depths c) critical depths d) normal depths 50 / 50 50. *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 Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. Send feedback Buy Hydraulics MCQ PDF for Offline Study
