Civil Engineering Hydraulics/Fluid Mechanics Mock test – 3



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1. On an inclined plane, centre of pressure is located
2. 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
3. Uniform flow is said to occur when
4. To avoid an interruption in the flow of a syphon, an air vessel is provided
5. Shear stress is directly proportional to
6. 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
7. Atmospheric pressure is equal to water column head of
8. The following is not a laminar flow
9. When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as
10. The value of momentum correction factor (β) for a laminar flow through a circular pipe, is
11. Discharge over an ogee weir remains the same as that of
12. Molecules of fluids get attracted due to
13. The best side slope for most economical trapezoidal section, is
14. Fluids change the volume under external presssure due to
15. In an open tube, free surface of mercury remains
16. 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
17. The rise of the liquid along the walls of a revolving cylinder above the initial level, is
18. Cappoletti weir is a
19. 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
20. Most economical section of a triangular channel, is
21. Piezometers are used to measure
22. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than
23. For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be
24. Manometers are used to measure
25. Dimensions of the dynamic viscosity (μ) are









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