The design period in years for pumping plants, is___________________?
The design period in years for pumg plants, is___________________?
A. 1
B. 2 to 3
C. 3 to 5
D. 5 to 10
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The upper surface of a weir over which water flows is known is________________?
The upper surface of a weir over which water flows is known is________________?A. crest
B. nappe
C. sill
D. weir top
E. contractaTwo dimensional flow occurs when___________________?
Two dimensional flow occurs when___________________?A. the direction and magnitude of the velocity at all points are identical
B. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
C. the magnitude and direction of the velocity do not change from point to point in the fluid
D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
E. velocity, depth, pressure, etc. change from point to point in the fluid flowThe porosity of sediments in sewer pipes, is usually taken as___________________?
The porosity of sediments in sewer pipes, is usually taken as___________________?A. 0.010
B. 0.011
C. 0.012
D. 0.013If no resistance is encountered by displacement, such a substance is known as___________________?
If no resistance is encountered by displacement, such a substance is known as___________________?A. fluid
B. water
C. gas
D. perfect solid
E. ideal fluidThe total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be____________________?
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be____________________?A. 500 kg
B. 1000 kg
C. 1500 kg
D. 2000 kg
E. 4000 kg.Reynolds number is significant in____________________?
Reynolds number is significant in____________________?A. supersonics, as with projectile and jet propulsion
B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
C. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
D. all of the above
E. none of the above