TCEQ Class A prep Exam1 -Solved
A 1 foot of column of water exerts how much pressure ? - ANSWER-1 foot = .433psi
A cross connection is a physical connection between a public water supply and ? -
ANSWER-1) another supply of unknown or questionable quality 2) any source that may
contain contamination and 3) any water that is treated to a lesser degree.
A Customer Service Inspection is - ANSWER-An examination of the private water
distribution facilities
A Customer Service Inspection must be performed - ANSWER-When the water
purveyor has reason to believed that cross-connections' exist,
after any material improvements, corrections, or additions.
Prior to providing continuing water service to new construction.
a ditch 4 feet wide , 6 feet deep and 1000 feet long will ve excavated . how many cubic
yards of pipe bedding will be needed to to bed the trech 7 inches deep. - ANSWER-This
is a volume question. so you would multiplied 4 feet by 1000 feet and convert this 7
inches to percent them multiplied that to get your leanth times with times height . that
gives you the cubic feet so you need to devide by 27 to get the cubic yards 85.9 yd3
A field using wastewater effluent for irrigation should be separated from a well by at
least - ANSWER-500 feet
A fire hydrant thrust block will have to be largest in - ANSWER-Peat
A piping arrangment extending 33.9 above the highest downstream opening is a -
ANSWER-Barometric loop
A PVB must be installed above all downstream piping and openings a minimum of ? -
ANSWER-12 inches
A record of the different layers of rock found in drilling well is a ? - ANSWER-Drilling log
A sample for physical and chemical analysis of a new well must be taken after how
many hours of continuous pumping - ANSWER-36 hours
A sanitary control easement must cover land within how many feet of a public water well
- ANSWER-150 feet
A structure 100 feet tall. Assuming the building has water lines all the way to the top ,
the pressure at ground level would apprxomatley what? - ANSWER-100 feet/ 2.31 to
get psi per foot , it would be 43.3
, A tank that has a capacity of 700,000 gallons must be disinfected with a dosaged of 50
mg/l of chlorine. how much 65% HTH will it take to achive the same goal - ANSWER-
mgdx8.34.50 is your normal forumal to find lbs of chlorine. how ever we need that is for
100 % we have 65% so you will need to .7mgdx8.34x50mg/l /.65 =449.07
A vacuum is - ANSWER-The absence of some atmospheric pressure
All backflow Prevention Assemblies are required to be tested - ANSWER-Upon
installation
An assembly containing two check valves, two shutoff valves and four test cocks is a -
ANSWER-Double Check valve Assembly
At room temperatures chlorine gas is - ANSWER-greenish-yellow , has pungent odor,
and is 2.5 heaver then air
Atmospheric pressure at sea level - ANSWER-14.7 psi
backwashing should expand the filter media by - ANSWER-30 to 50 percent
Because it is filtered through earth material, ground water is usually free of ? -
ANSWER-Turbidity
Cathodic protection is - ANSWER-and electrochemical means of preventing corrosion
on tank surfaces below the water line.
Chapter 290 Rules and Regulations requries chemical analysis of water supplies every -
ANSWER-year
Check valves on the discharge side of a pump are used to- - ANSWER-keep water from
flowing back through the pump when it is shut off
Considering friction , how many 6 inch water lines would be required to carry the same
amount of water as one 12 inch water line ? - ANSWER-N=diam of larger pipe/ doam of
smaller pipe )^5/2
(12/6)^(5/2)=5.65
Containment is described as : - ANSWER-Protection of the public water supply at the
service connection and premises location
Dead end mains should be flushed every - ANSWER-month
Detention time in sedimetation basins must be at least how many hours to allow floc to
settle - ANSWER-six
Developing a well refers to - ANSWER-Removing fine sand and drilling mud
A 1 foot of column of water exerts how much pressure ? - ANSWER-1 foot = .433psi
A cross connection is a physical connection between a public water supply and ? -
ANSWER-1) another supply of unknown or questionable quality 2) any source that may
contain contamination and 3) any water that is treated to a lesser degree.
A Customer Service Inspection is - ANSWER-An examination of the private water
distribution facilities
A Customer Service Inspection must be performed - ANSWER-When the water
purveyor has reason to believed that cross-connections' exist,
after any material improvements, corrections, or additions.
Prior to providing continuing water service to new construction.
a ditch 4 feet wide , 6 feet deep and 1000 feet long will ve excavated . how many cubic
yards of pipe bedding will be needed to to bed the trech 7 inches deep. - ANSWER-This
is a volume question. so you would multiplied 4 feet by 1000 feet and convert this 7
inches to percent them multiplied that to get your leanth times with times height . that
gives you the cubic feet so you need to devide by 27 to get the cubic yards 85.9 yd3
A field using wastewater effluent for irrigation should be separated from a well by at
least - ANSWER-500 feet
A fire hydrant thrust block will have to be largest in - ANSWER-Peat
A piping arrangment extending 33.9 above the highest downstream opening is a -
ANSWER-Barometric loop
A PVB must be installed above all downstream piping and openings a minimum of ? -
ANSWER-12 inches
A record of the different layers of rock found in drilling well is a ? - ANSWER-Drilling log
A sample for physical and chemical analysis of a new well must be taken after how
many hours of continuous pumping - ANSWER-36 hours
A sanitary control easement must cover land within how many feet of a public water well
- ANSWER-150 feet
A structure 100 feet tall. Assuming the building has water lines all the way to the top ,
the pressure at ground level would apprxomatley what? - ANSWER-100 feet/ 2.31 to
get psi per foot , it would be 43.3
, A tank that has a capacity of 700,000 gallons must be disinfected with a dosaged of 50
mg/l of chlorine. how much 65% HTH will it take to achive the same goal - ANSWER-
mgdx8.34.50 is your normal forumal to find lbs of chlorine. how ever we need that is for
100 % we have 65% so you will need to .7mgdx8.34x50mg/l /.65 =449.07
A vacuum is - ANSWER-The absence of some atmospheric pressure
All backflow Prevention Assemblies are required to be tested - ANSWER-Upon
installation
An assembly containing two check valves, two shutoff valves and four test cocks is a -
ANSWER-Double Check valve Assembly
At room temperatures chlorine gas is - ANSWER-greenish-yellow , has pungent odor,
and is 2.5 heaver then air
Atmospheric pressure at sea level - ANSWER-14.7 psi
backwashing should expand the filter media by - ANSWER-30 to 50 percent
Because it is filtered through earth material, ground water is usually free of ? -
ANSWER-Turbidity
Cathodic protection is - ANSWER-and electrochemical means of preventing corrosion
on tank surfaces below the water line.
Chapter 290 Rules and Regulations requries chemical analysis of water supplies every -
ANSWER-year
Check valves on the discharge side of a pump are used to- - ANSWER-keep water from
flowing back through the pump when it is shut off
Considering friction , how many 6 inch water lines would be required to carry the same
amount of water as one 12 inch water line ? - ANSWER-N=diam of larger pipe/ doam of
smaller pipe )^5/2
(12/6)^(5/2)=5.65
Containment is described as : - ANSWER-Protection of the public water supply at the
service connection and premises location
Dead end mains should be flushed every - ANSWER-month
Detention time in sedimetation basins must be at least how many hours to allow floc to
settle - ANSWER-six
Developing a well refers to - ANSWER-Removing fine sand and drilling mud
