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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. *Hydraulic gradient line (except siphon) a) remains above the centerline of the conduit b) remains below the centerline of the conduit c) remains parallel to the centerline of the conduit d) may be above or below the centerline of the conduit 2 / 50 2. *Bernoulli's theorem deals with the law of conservation of a) energy b) all of the above c) mass d) momentum 3 / 50 3. *The condition for the maximum velocity and discharge is given by (closed flow) a) 0.81D & 0.95D b) 0.82D & 0.94D c) 0.83D & 0.93D d) 0.84D & 0.92D 4 / 50 4. *The discharge through a trapezoidal channel is maximum when a) m = d b) m = 2d c) m = 3d d) m = d/2 5 / 50 5. 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 6 / 50 6. The viscosity of liquids varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 7 / 50 7. *Cavitations is caused by a) low pressure b) high pressure c) low velocity d) high velocity 8 / 50 8. 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 9 / 50 9. *Surface tension is the force a) per unit length b) per unit area c) per unit volume d) all of the above 10 / 50 10. Liquids or fluids a) have no shape b) cannot be compressed c) both (a) and (b) of above d) none of the above 11 / 50 11. 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 12 / 50 12. 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 13 / 50 13. *The specific weight of water 1000 kg/m^3 a) at normal pressure of 760 mm b) at 4°C temperature c) at mean sea level d) all of the above 14 / 50 14. *The term v^2/2g is known as a) kinetic energy b) pressure energy c) kinetic energy per unit weight d) none of the above 15 / 50 15. *Cipolleti weir is a a) rectangular weir whose length is kept 3 times the height of the water above the sill b) triangular weir, whose notch angle is 90° c) trapezoidal weir, whose sides slope 1 horizontal to 4 verticals d) a combination of rectangular and triangular weirs 16 / 50 16. 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 17 / 50 17. 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 18 / 50 18. *Stoke is the unit of a) surface tension b) viscosity c) kinematic viscosity d) none of the above 19 / 50 19. Poise is the unit of a) mass density b) kinematic viscosity c) viscosity d) pressure gradient 20 / 50 20. *Orifice-meter is used to measure: a) pressure at the point b) discharge c) average speed d) velocity 21 / 50 21. A fluid particle may possess the displacement of a) translation b) rotation c) distortion d) all of the above 22 / 50 22. Super-critical flow occurs in a) normal slope b) mild slope c) steep slope d) all of the above 23 / 50 23. *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 24 / 50 24. *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> 25 / 50 25. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is a) 500 HP b) 550 HP c) 400 HP d) 450 HP 26 / 50 26. *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 27 / 50 27. *In flow, the liquid particles may possess a) potential energy b) kinetic energy c) pressure energy d) all of the above 28 / 50 28. *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 29 / 50 29. *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 30 / 50 30. 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 31 / 50 31. 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 32 / 50 32. Mouthpieces are used to measure a) velocity b) pressure c) head d) rate of flow 33 / 50 33. 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 34 / 50 34. 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 35 / 50 35. *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 36 / 50 36. 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 37 / 50 37. ........ 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 38 / 50 38. The most efficient channel section is a) semi-circular b) rectangular c) triangular d) trapezoidal 39 / 50 39. *The notch angle for the maximum discharge over a triangular notch is a) 30° b) 60° c) 90° d) 120° 40 / 50 40. 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 41 / 50 41. *Manometers 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 42 / 50 42. *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 43 / 50 43. 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 44 / 50 44. *The upper surface of the weir over which water flows is known as: a) vein b) nappe c) sill d) none of the above 45 / 50 45. 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 46 / 50 46. To avoid an interruption in the flow of a siphon, the air vessel is provided a) at the inlet b) at the outlet c) at the summit d) at the point between the inlet and outlet 47 / 50 47. 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 48 / 50 48. 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 49 / 50 49. *Capillarity of water is a) directly proportional to surface tension b) inversely proportional to the angle of contact c) inversely proportional to the diameter of the pipe d) all of the above 50 / 50 50. *Surface float is used to measure a) pressure b) difference in pressure c) viscosity of flow d) none of the above Please provide accurate information so we can send your Achievement Certificate by mail. 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