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Texas Basic Waste Water Operations Ch#06 Prelim Treatment & Flow Meas. - Statistics

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  • This quiz has been taken 29 times
  • The average score is 19 of 23
Answer Stats
Question Answer % Correct
It is important to monitor the flow in order to calculate plant load, as well as to determine ________. all of the above
100%
Pre-aeration is used to remove grit, reduce ________, add oxygen, and promote grease flotation. gases
100%
The magnetic meter works by the law of ________. induction
100%
Final disposal of grit, screenings, and grease is by burial in a ________. landfill
100%
Use flow equalization to control variations in flow patterns or ________ loads. shock
100%
An ultrasonic flow monitoring device works on the principle of ________. sonar
100%
Preliminary treatment is usually the first step in the treatment process. True
100%
Types of grinding units include comminutor and barminutor. True
100%
Common designs of grit removal units are hand-cleaned chambers, mechanically cleaned chambers, aerated chambers, cyclone separators, and screw washers. True
100%
A cyclone separator spins the wastewater in a spiral flow and throws the grit, by centrifugal force, to the wall of the unit, where it falls to the bottom. True
100%
Common weir designs are rectangular, Cipolletti, and ________. V-notch
100%
Flow measuring devices must be ± ________% accurate. 10
80%
Diffused ________ causes lightweight grease particles to rise to the surface air
80%
________ calibrate flow measuring devices. Annually
80%
A weir is an obstruction placed in a channel, causing the water to ________. back up
80%
Chlorine helps ________ grease, making it easy to skim. congeal
80%
The purpose of a grit washer is to remove ________ material from the grit. organic
80%
Flow is the water volume passing a given point, in a specified interval, in gallons per minute or cubic feet per ________. second
80%
Before making screen repairs, the power should be turned off, tagged, and the controls locked. True
80%
________ interferes with the biological treatment process. Grease
60%
The ________ of the water flowing over the weir determines the flow rate. depth
40%
Grit removal prevents buildup of settleable organic solids. False
40%
Water velocity in a grit chamber is about 2 ft/sec. False
20%
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