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Surface Water Treatment C license Questions & answers
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Surface Water Treatment C license Questions & answers
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Surface Water Treatment: C licenseOne cubic foot of water contains ________ gallons - ANS-7. 48 gallons
In rain water reservoirs, the most common effect of aeration is ... - ANS-Removal of
taste and odors
The sand filter will NOT remove ... - ANS-Dissolved Oxygen
The multiple-tube fermentation test consists of three distinct tests. These tests in the
order performed, are ... - ANS-Presumptive test
Confirmed test
Completed test
If using the combined available chlorine residual (CACR) method of disinfection: -
ANS-When water temperature decreases, the CACR must be increased in order to
maintain proper chlorine residuals.
Most surface water in TX comes from... - ANS-Precipitation that falls within the state
Sedimentation is improved by...
U H L V flow through basin - ANS-Uniform, Horizontal, Low Velocity flow, across the
basin
A chemical commonly used to raise pH is... - ANS-Lime (Soda Ash)
The pH scale run from _______ to ______ - ANS-0 - 14
If sludge remains to long on the bottom of a sedimentation basin problems that could
develop are... - ANS-Taste and odors problems
reduction of detention Time in basin
re-suspension of Solids
creation of Septic conditions
The chemical name for muratic acid is... - ANS-Hydrochloric acid
According to average annual water budget for TX, the majority of surface water leaves
the state by...
, ________ & _______ - ANS-Evaporation and Transpiration
A major cause of pump and motor shaft coupling wear is a... - ANS-Misalignment
between, pumps and motor flanges
When opening and closing valves in high pressure lines the valves should be closed
how? - ANS-Slowly
Chlorine valves are opened and closed with what? - ANS-Valve wrenches provided with
a cylinder or 1 - ton container by the manufacturer
Leakage from a packing gland should be approximately... - ANS-one drop per second
What is the MGD of the flow in 35,000 gallons per day - ANS-0.035 MGD
When a coagulant reacts with finely divided and suspended material in raw
water______ is formed. - ANS-Floc
A chlorine residual in water can be determined by using the reagent... - ANS-DPD
diethyl-p-phenylenediamine
The most important factor affecting the useful life of piping is the ability of that piping to
resist what? - ANS-Internal and external Corrosion
A pH reading of 6.0 in raw water indicates the sample is ... - ANS-Acidic
What does water weigh, in terms of pounds per gallon? - ANS-8.34 pounds per gallon
Which one of the following types of meters has no moving parts?
-propellar
-proportional
-rotometer
-venturi - ANS-Venturi
The loss-of-head through a sand filter is influence by... - ANS--sand particle size
-filtration rate
-water temperature
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