Online Exam Hydraulic Exam set November 26, 2021 Share Welcome to your Hydraulic Exam Set 1 Name 1. When a body is placed over a liquid, it will sink down ifGravitational force is equal to the up-thrust of the liquidGravitational force is less than the up-thrust of the liquidGravitational force is more than the up-thrust of the liquidNone of the above 2. The property by virtue of which a liquid opposes relative motion between its different layers is calledSurface tensionCoefficient of viscosityViscosityOsmosis 3. A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.Equal toLess thanMore thanNone of these 4. When a body floating in a liquid, is displaced slightly, it oscillates aboutC.G. of bodyCenter of pressureCenter of buoyancyMetacentre 5. The side slope of Cipolletti weir is generally kept1 to 41 to 31 to 21 : 5 6. When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal toweight of the bodyweight of the fluid displaced by the bodyweight of the body and fluild displaced by the bodydifference of weights of the fluid displaced and that of the body 7. The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is2/33/22/55/2 8. The continuity equationexpresses the relationship between work and energyrelates the momentum per unit volume between two points on a stream linerelates mass rate of flow along a stream linerequires that Newton's second law of motion be satisfied at every point in fluid. 9. In flow, the liquid particles may possesspotential energykinetic energypressure energyall the above. 10. Euler's equation for the motion of liquids assumes thatfluid is viscousfluid is homogeneous and incompressiblevelocity of flow is non-uniform over the sectionflow is unsteady along the stream line. 11. For most economical rectangular section of a channel, the depth is keptone-fourth of the widththree times the hydraulic radiushalf the widthhydraulic mean depth 12. In a centrifugal pump casing, the flow of water leaving the impeller, isrectilinear flowradial flowfree vortex motionforced vertex. 13. To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is2°3°4°5° 14. Non uniform flow occurs whenThe direction and magnitude of the velocity at all points are identicalThe velocity of successive fluid particles, at any point, is the same at successive periods of timeVelocity, depth, pressure, etc. change from point to point in the fluid flowThe fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane 15. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.ConcaveConvexPlaneNone of these 16. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known asMeta centerCenter of pressureCenter of buoyancyCenter of gravity 17. Dimensions of the dynamic viscosity (μ) areMLT-2M-1L-1T-1ML-1T-2ML-1T-1. 18. Discharge over an ogee weir remains the same as that ofsharp crested weirtriangular weircippoletti weirdrowned weir. 19. Atmospheric pressure is equal to water column head of9.81 m5.0 m10.30 m7.5 m. 20. Shear stress is directly proportional tothe velocitythe shear strainthe viscositythe velocity 21. To avoid an interruption in the flow of a syphon, an air vessel is providedat the inletat the outletat the summitat any point between intet and outlet 22. Pick up the correct statement from the following :Total energy gradient is the graphical representation of the total head at any section of a pipe lineVertical distance between the total energy line and hydraulic grade line is equal to the velocity headVertical distance between the total energy line and total energy gradient represents loss of headall the above 23. Most economical section of a triangular channel, isequilateral triangleright angled triangleisosceles triangle with 45° vertex angleright angled triangle with equal sides. 24. In an open tube, free surface of mercury remainshorizontalcurved upwardscurved downwardsnone of these. 25. The value of momentum correction factor (β) for a laminar flow through a circular pipe, is1/22/33/44/3 Comment List padambudha80@gmail.com Leave a comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. helloloksewa

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