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. 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 2 / 50 2. 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 3 / 50 3. "Maximum efficiency of power transmission through a pipe is a) 50% b) 60% c) 66% d) 76% 4 / 50 4. "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 5 / 50 5. 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 6 / 50 6. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in... a) the same direction b) different directions c) both of the above d) none of the above 7 / 50 7. Hydrostatic pressure on a dam depends upon its a) length b) depth c) shape d) both (b) and (c) of the above 8 / 50 8. 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 9 / 50 9. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 10 / 50 10. 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 11 / 50 11. 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 12 / 50 12. *To measure atmospheric pressure, we use a) barometers b) piezometer c) manometers d) differential manometers 13 / 50 13. *An orifice is called a large orifice if the water head is a) two times the diameter of the pipe b) three times the diameter of the pipe c) four times the diameter of the pipe d) five times the diameter of the pipe 14 / 50 14. In an inclined position, a venturimeter records a) less reading b) same reading c) more reading d) none of the above 15 / 50 15. *Bernoulli's equation is applied to a) venturimeter b) orifice meter c) pitot tube d) all of the above 16 / 50 16. *Orifice-meter is used to measure: a) pressure at the point b) discharge c) average speed d) velocity 17 / 50 17. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above 18 / 50 18. A rise or fall of liquid in a glass tube of a very small diameter when dipped is a) directly proportional to the force per unit length of periphery b) directly proportional to the sine of the angle of contact c) directly proportional to the specific weight of the liquid d) inversely proportional to the diameter of the glass tube 19 / 50 19. *The atmospheric pressure varies with a) altitude b) temperature c) weather conditions d) none of the above 20 / 50 20. The numerical value of vorticity is.....of the rotation a) twice b) thrice c) same d) all of the above 21 / 50 21. A substance which deforms continuously under the action of shear stress is called a) fluid b) liquid c) solid d) gas 22 / 50 22. *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 23 / 50 23. 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 24 / 50 24. 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 25 / 50 25. 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 26 / 50 26. 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 27 / 50 27. 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 28 / 50 28. *Capillary rise is proportional to a) surface tension b) unit weight of water c) diameter of the pipe d) none of the above 29 / 50 29. *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 30 / 50 30. *Pascal's law states that pressure at a point is equal in all directions a) in a liquid at rest b) in a fluid at rest c) in a laminar flow d) in a turbulent flow 31 / 50 31. 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 32 / 50 32. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called a) unsteady flow b) compressible flow c) rotational flow d) none of the above 33 / 50 33. 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 34 / 50 34. Mach number is the ratio of inertia force to a) viscosity b) Froude number c) gravitational force d) elasticity 35 / 50 35. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as a) 70 cm of oil b) 2 m of oil c) 20 cm of oil d) 80 cm of oil 36 / 50 36. 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 37 / 50 37. In an open channels the analysis of a sugar is done by using a) continuity equation b) momentum equation c) energy equation d) none of the above 38 / 50 38. *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 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. Super-critical flow occurs in a) normal slope b) mild slope c) steep slope d) all of the above 41 / 50 41. *Losses are more in a) laminar flow b) critical flow c) turbulent flow d) transition flow 42 / 50 42. *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 43 / 50 43. 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 44 / 50 44. *The actual velocity through an orifice is........... than the theoretical velocity. a) more b) less c) equal d) not defined 45 / 50 45. Water belongs to a) compressible fluids b) none of the above c) Newtonian fluids d) non-Newtonian fluids 46 / 50 46. The total energy of a liquid in motion is equal to: a) pressure energy + kinetic energy + potential energy b) pressure energy - (kinetic energy + potential energy) c) potential energy - (pressure energy + kinetic energy) d) kinetic energy - (pressure energy + potential energy) 47 / 50 47. 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 48 / 50 48. 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 49 / 50 49. *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 50 / 50 50. *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 Please provide accurate information so we can send your Achievement Certificate by mail. 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