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General Principles of Pumping Stations and Layout


Quiz Questions

1.Pumping stations are one of the more vulnerable features of a flood protection project. The failure of a pumping station during a flood could result in considerable damage within the protected area.
True
False
2. Engineers responsible for the preliminary design and layout of the pumping facility should coordinate any special design features that may affect the local sponsor’s costs with the project manager.
True
False
3. Pumping stations affect the hydrology and water quality of both the receiving and supplying water bodies. The changed hydrologic and water quality conditions often affect other environmental parameters.
True
False
4. Reduced dissolved oxygen, increased temperature, increased turbidity and suspended solids are the adverse environmental impacts of a pumping station.
True
False
5. Length, location, and type of construction of the connection are not one of the factor affecting the reliability of the supply connection between the power source and the pumping station.
True
False
6. Pumping station capacity requirements are normally determined by the ______________in accordance with EM 1110-2-1413. This manual provides the basis for establishing pumping requirements for the maximum and minimum river stages, and the maximum water stages permissible in the protected area.
Hydraulics engineer
Electrical engineer
7. A pumping station should be located or sited in such a manner to produce the most direct inflow possible.
True
False
8. Floodwater pumping stations should not be of the wet-pit (sump) type employing vertical mixed-flow or axial-flow pumps in practically all cases as seen in page 9.
True
False
9. If seepage flows are more than 30 % of the total required capacities of the pumping station, the number and capacity of the pumps shall be such that a 100% standby pumping capacity is available with failure of any installed pump.
True
False
10.The size of the sump may affect the selection of sizes and number of pumps with regard to the minimum desirable operating cycle.
True
False
11. Trash racks should have ample net area so that the velocity of the flow through the gross rack area does not exceed 0.76 m/ sec (2.5 fps). The clear opening between bars should be approximately 45 mm (1-3/4 in.), but may be greater if justified by the size and type of pumps to be protected, but should not exceed 75 mm (3 in.) in any case.
True
False
12. In general, a single pipeline should be installed and direct-connected to each pump. In the case of pumping stations of small capacity (315 /sec (5,000 gpm) or less), two pumps may be connected to the same line. The connection should be made inside the pumping station or a valve vault outside of the pumping station by a fitting..
True
False
13.Underground discharge lines in small pumping stations should not have a check valve on each pump discharge line to prevent backflow.
True
False
14. Proper ventilation of pumping stations is not an important design consideration.
True
False
15. The space heater should be sized to maintain a minimum temperature of ____________
12.8 C (55F)
100 F
None