For a given storm, other factors remaining same, in flood hydrographs, well- dev

Question

For a given storm, other factors remaining same, in flood hydrographs, well- developed basins give (a) shorter time to peak flow and small peak flow (b) longer time to peak flow and small peak flow (c) longer time to peak flow and large peak flow (d) shorter time to A unit hydrograph has one unit of (a) peak discharge (b) rainfall duration (c) Groundwater generally have consistent water quality that includes (a) havinga peak flow and large peak flow 2. direct runoff (d) the time base of direct runoff 3. higher total dissolved solids content than surface water than amount of bacteria than surface waters (b) having a lower mineral content surface waters (c) having lower pH values than surface waters (d) having a higher 4. Water Quality Standards include a number of regulations which are enforceable Which one of the following is not enforceable? (a) The lead and copper rule (b) Maximum contaminant level goals (c) The surface water treatment rule (c) National interim drinking water regulation (d) Maximum contaminant level Which of the following is a common index organism of water contamination? Which one of the following is used as coagulation aid? (a) pH adjuster (b) clay Which type of sedimentation can be expressed by Stoke's Law? (a) Type l 5. (a) Coliforms (b) Rhizobia (c) Cyanobacteria (d) Staphylcocci 6. (c) polymer (d) All of the above 7. discrete setting (b) Type Il -flocculation settling (c) Type III zone settling (d) All of the above. 8. Which chlorine or chlorine compound has higher oxidation potential and more (d) Both (b) and (c) (a) organic effect in disinfection? (a) CiO2 (b) combined chlorine (c) free chlorine 9 Breakpoint chlorination is to depict the reaction between chlorine and carbon (b) any reducing agents (c) pathogens (d) ammonia 10 The central goal of the U.S. Clean Water Act was to (a) make all surface waters swimmable and fishable. (b) categorize water into types of use and then establish an array of different cleanup goals. (c) end all water pollution in the U.S. by 2050. (d) eliminate all nonpoint source pollution where economically feasible.

Explanation / Answer

1. Shorter time to peak flow and small peak flow.

2. Direct runoff.

3. Ground water contain higher total dissolved solids content than surface water.

4. The surface water treatment.

5. Coliforms (E. coli).

6. All of the above.

7. All of the above.

8. Free chlorine.

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