Civil Engineering Hydraulics/Fluid Mechanics Mock test – 3



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1. Molecules of fluids get attracted due to
2. When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as
3. Atmospheric pressure is equal to water column head of
4. For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is
5. An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to
6. Dimensions of the dynamic viscosity (μ) are
7. f total head available at the inlet of pipe and f1 is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (ηmax) is
8. Uniform flow is said to occur when
9. In an open tube, free surface of mercury remains
10. Fluids change the volume under external presssure due to
11. Cappoletti weir is a
12. The following is not a laminar flow
13. For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be
14. On an inclined plane, centre of pressure is located
15. Shear stress is directly proportional to
16. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than
17. Piezometers are used to measure
18. The value of momentum correction factor (β) for a laminar flow through a circular pipe, is
19. If velocities of fluid particles vary from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be
20. Discharge over an ogee weir remains the same as that of
21. To avoid an interruption in the flow of a syphon, an air vessel is provided
22. Manometers are used to measure
23. Most economical section of a triangular channel, is
24. The best side slope for most economical trapezoidal section, is
25. The rise of the liquid along the walls of a revolving cylinder above the initial level, is









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