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. 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 2 / 50 2. 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 3 / 50 3. *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 4 / 50 4. 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 5 / 50 5. Weber number is the ratio of inertia force to a) surface tension b) gravitational force c) elasticity d) viscosity 6 / 50 6. *If a pitot tube is placed with its nose facing sideways, the liquid a) rises in the tube b) falls in the tube c) neither rises nor falls in the tube d) all of the above 7 / 50 7. *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 8 / 50 8. 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 9 / 50 9. A substance which deforms continuously under the action of shear stress is called a) fluid b) liquid c) solid d) gas 10 / 50 10. 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 11 / 50 11. Falling drops of water become spheres due to a) adhesion b) cohesion c) surface tension d) viscosity 12 / 50 12. 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 13 / 50 13. 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 14 / 50 14. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is a) Euler number b) Froude number c) Weber number d) Reynolds number 15 / 50 15. *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> 16 / 50 16. *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 17 / 50 17. *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 18 / 50 18. *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 19 / 50 19. 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 20 / 50 20. 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 21 / 50 21. 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 22 / 50 22. From a nozzle exposed to the atmosphere, the liquid jet traverses a) a straight line b) a circular path c) a parabolic path d) an elliptical path 23 / 50 23. 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 24 / 50 24. *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 25 / 50 25. Hydraulic gradient line and total energy line are a) same b) different c) differ by pressure head d) differ by static head 26 / 50 26. 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 27 / 50 27. *1 m head is equivalent to a) 0.1 kg/cm^2 b) 0.2 kg/cm^2 c) 0.3 kg/cm^2 d) 0.4 kg/cm^2 28 / 50 28. *Surface tension is the force a) per unit length b) per unit area c) per unit volume d) all of the above 29 / 50 29. *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 30 / 50 30. *Rotameter is used for measuring a) density of fluids b) value of fluids in a pipe c) discharge of fluids d) pressure in fluids 31 / 50 31. 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 32 / 50 32. *Water cushion is used to a) sit in the house b) destroy the energy c) produce energy d) none of the above 33 / 50 33. *Orifice-meter is used to measure: a) pressure at the point b) discharge c) average speed d) velocity 34 / 50 34. The numerical value of vorticity is.....of the rotation a) twice b) thrice c) same d) all of the above 35 / 50 35. 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 36 / 50 36. The pressure difference between inside and outside of a droplet of water is given by (Where σ is surface tension and d is the diameter of the droplet.) a) 2σ/d b) 4σ/d c) 6σ/d d) 8σ/d 37 / 50 37. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by a) Pascal b) Newton c) Archimedes d) all of the above 38 / 50 38. The water immediately downstream of the conduit or weir is called a) head water b) tail water c) main water d) surplus water 39 / 50 39. 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 40 / 50 40. The viscosity of gases varies with temperature a) directly proportional b) inversely proportional c) constant d) none of the above 41 / 50 41. 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 42 / 50 42. *The magnitude of water hammer depends upon a) the length of the pipeline b) elastic properties of liquid c) elastic properties of the pipe material d) diameter of the pipeline 43 / 50 43. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm. a) 0.393 cm rise b) 0.393 cm fall c) neither fall nor rise d) all of the above 44 / 50 44. Which of the following quantities are dimensionless? a) surface tension b) specific weight c) angular velocity d) Mach number 45 / 50 45. ........ 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 46 / 50 46. *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 47 / 50 47. *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 48 / 50 48. *The hydraulic ram is a pump that works on a) the principle of water hammer b) the principle of centrifugal action c) the principle of reciprocation action d) all of the above 49 / 50 49. Cavitations is collapsed by a) low pressure b) high pressure c) low velocity d) high velocity 50 / 50 50. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if a) the area is horizontal b) the area is vertical c) the area is inclined d) all of the above 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