QUESTIONS & VERIFIED COMPLETE
SOLUTIONS 100%
In Texas, water operator licensing is administer by the? - correct answer ✔✔TCEQ
Which minerals cause hardness in water - correct answer ✔✔magnesium and calcium T
the most important federal law impacting the water utility industry is - correct answer ✔✔Safe
Drinking Water Act
The four water quality standards established for drinking water in the Safe Drinking Water Act
are chemical, bacteriological,
radiological and - correct answer ✔✔chemical, bacteriological, radiological and physical.
The minimum allowable pressure in the distribution system under emergency conditions is -
correct answer ✔✔20 psi
Water vapor given off by plants and trees is know as - correct answer ✔✔tranpiration
organic matter includes - correct answer ✔✔wood, dogs, algae, bacteria
The single most important water treatment process is - correct answer ✔✔disinfection
excessive nitrates in drinking water can cause what syndrome in infants - correct answer
✔✔blue baby
, A sanitary control easement must cover land within how many feet of a public water well -
correct answer ✔✔150 feet
A sample for physical and chemical analysis of a new well must be taken after how many hours
of continuous pumping - correct answer ✔✔36 hours
Chapter 290 Rules and Regulations requires chemical analysis of water supplies every - correct
answer ✔✔year
In Texas, all public water systems are required to have what facilities - correct answer
✔✔chlorination
Detention time in sedimentation basins must be at least how many hours to allow floc to settle -
correct answer ✔✔six
backwashing should expand the filter media by - correct answer ✔✔30 to 50 percent
The MCL for Trihalomethanes in drinking water is - correct answer ✔✔0.080 mg/l
At room temperatures chlorine gas is - correct answer ✔✔greenish-yellow , has pungent odor,
and is 2.5 heaver then air
Disease that may be spread by inadequately disinfected water are - correct answer ✔✔typhoid,
cholera, infectious hepatitis, legionnaires disease.
minimum chlorine residuals of free and toral in the far reaches of the distribution system is -
correct answer ✔✔.2/.5