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. Hydraulic gradient line for an open flow channel is a) below water level b) same as water level c) above water level d) all of the above 2 / 50 2. The maximum velocity in an open channel occurs a) at the bottom of the channel b) at 1/2 the depth of the channel c) slightly below the free surface d) at the free surface 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. 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 5 / 50 5. *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 6 / 50 6. 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 7 / 50 7. *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 8 / 50 8. *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 9 / 50 9. 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 10 / 50 10. The term z is known as a) potential energy b) pressure energy c) potential energy per unit weight d) none of the above 11 / 50 11. *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 12 / 50 12. 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 13 / 50 13. 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 14 / 50 14. *Chazy's formula is given by a) v = C√mi b) v = m√ci c) v = C√mci d) v = i√mc 15 / 50 15. Reynolds number is the ratio of initial force and a) viscosity b) elasticity c) gravitational force d) surface tension 16 / 50 16. *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 17 / 50 17. The most economical section of a circular channel for the maximum discharge is when a) depth of water = 0.95 diameter of the circular section b) hydraulic mean depth = 0.286 diameter of the circular section c) wetted perimeter = 2.6 diameters of the circular section d) all of the above 18 / 50 18. 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 19 / 50 19. *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 20 / 50 20. *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 21 / 50 21. 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 22 / 50 22. An intensifier is used to increase a) pressure b) temperature c) energy d) none of the above 23 / 50 23. 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 24 / 50 24. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62) a) 2.48 m b) 2.73 m c) 2.50 m d) 2.51 m 25 / 50 25. 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 26 / 50 26. *The types of instrument used to measure low pressure with accuracy is a) piezometer b) barometer c) micro manometer d) mechanical gauge 27 / 50 27. A steady uniform flow is through a a) long pipe at decreasing rate b) long pipe at constant rate c) long pipe at increasing rate d) none of the above 28 / 50 28. *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 29 / 50 29. 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 30 / 50 30. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is a) 0.1H b) 0.2H c) 0.3H d) 0.4H 31 / 50 31. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as a) capillary rise b) capillary fall c) rising d) none of the above 32 / 50 32. 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 33 / 50 33. Poise is the unit of a) mass density b) kinematic viscosity c) viscosity d) pressure gradient 34 / 50 34. 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 35 / 50 35. Gauge pressure is a) absolute - atmosphere b) absolute + atmosphere c) atmospheric ± absolute d) none of the above 36 / 50 36. 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 37 / 50 37. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is a) 750 kg/m^3 b) 12000 kg/m^3 c) 1.33 d) 0.75 38 / 50 38. The depth of flow after the hydraulic jump is a) d2 = d1/2 [√1+8(Fe)1^2 -1] b) d1 = d2/2 [√1+8(Fe)1^2 -1] c) d2 = d1/3 [√1+8(Fe)1^2 -1] d) d2 = d1/2 [√1+2(Fe)1^2 -1] 39 / 50 39. For uniform flow in the channel a) the total energy line, hydraulic gradient line, and the bottom of the channel are parallel b) the total energy line and water surface are horizontal, while the bottom of the channel is inclined c) total energy line, water surface, and the bottom of the channel are parallel d) none of the above 40 / 50 40. *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 41 / 50 41. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 42 / 50 42. One horsepower is equal to a) 1 kW b) 0.746 kW c) 0.836 kW d) 0.756 kW 43 / 50 43. 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 44 / 50 44. *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 45 / 50 45. Weber number is the ratio of inertia force to a) surface tension b) gravitational force c) elasticity d) viscosity 46 / 50 46. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is a) 1 b) 0.1 c) 0.001 d) 0.0001 47 / 50 47. *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 48 / 50 48. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called a) path line b) stream line c) potential line d) streak line 49 / 50 49. 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 50 / 50 50. *Surface tension is the force a) per unit length b) per unit area c) per unit volume d) all of the above 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