TCEQ SURFACE WATER B EVALUATION EXAMS
CORRECT QUESTIONS AND ANSWERS SURE A+
✔✔How much should you be able to expand the filer bed of a mixed media filters
without an air scour? - ✔✔The filter bed should be able to expand by at least 25%
during a backwash.
✔✔What three purposes do under-drains serve? - ✔✔1. They support the filter media
2. The collect filtrate and transport it to the manifold
3. They deliver uniform backwash and promote even filtering
✔✔What are the most important design factors for filters? - ✔✔The most important
factors are sand particle and filter bed depth
✔✔What are the protective measures for handling dry aluminum? - ✔✔1. Use of
protective equipment (clothing, gloves, footware, glasses, goggles, face shield)
2. Handle in open or well ventilated areas
3. Where dusts, mists, or aerosols may occur, use a NIOSHA approved half-face piece
cartridge air purifying respirator
4. Eye wash and shower stations available
✔✔When starting a safety program what is the first step? - ✔✔Start with a written safety
policy so that everyone understands what is required of them and what controls are in
,regard to their position and work. People then know what expectations to meet and
begin to build a good safety attitude.
✔✔What is the retention time by Texas law of records for microbiological analyses and
chemical analysis? - ✔✔Microbiological analysis is 5 years
Chemical analysis is 10 years
✔✔What does the Texas Hazard Communication Act require an employer to provide to
the employees? - ✔✔The Texas Hazards Communication act requires employers to
provide information and training to employees on the hazards of chemicals that they use
or work with.
✔✔An employee will not follow safety rules and feels like they do not have to followed.
What should an employer do? - ✔✔Document employee's actions and counsel
employee. If he does not respond discharge him.
✔✔What is one method of ensuring safety in a trench or excavation? - ✔✔One method
of ensuring safety and health of workers in a trench or excavation is to slope the sides
of the cut to the "angle of repose", or the angle closet to the perpendicular at which the
soil will remain at rest without shoring. Angle of repose is determined by soil type and
ditch conditions.
✔✔What is the minimum width for any ditch with workers? - ✔✔The minimum width for
any ditch in which workers must work is 18 inches. A ditch for water main construction
should be at least 12 inches wider than the outside pipe diameter. Ditch should be as
narrow as practical to prevent excessive trench load on the pipe. The wider the trench,
the more trench load is placed on the pipe.
✔✔What causes most underground pipe failures? - ✔✔90% of underground pipe
failures are related to improper backfill and lack of proper bedding.
✔✔An operator hears pinging in the pump. What is causing this? - ✔✔Cavitation,
caused by formation and collapse of bubbles in the water which causes noise and
vibration. Pitting of metal may result if cavitation is not eliminated.
✔✔What does a check valve on the pump discharge do? - ✔✔A check valve on the
pump discharge of a pump prevents back-flow.
✔✔Customer complains about low water pressure. What should operator do? - ✔✔All
complaints should be throughly checked out by a representative of the municipality who
can deal with the public in a calm and dignified manner. Some causes of low water
pressure are clogged screens on faucets, a lean or break in the area, flushing of water
mains, build up in pipes or meter, a partially closed valve, heavy water use during
summer and fire rescue.
, ✔✔What is the quality of raw water affected by? - ✔✔The quality of raw water in any
geographic locality is determined primarily by natural factors such as geology,
topography, and climate in each locality.
✔✔What can affect chemical activity/reactivity in water? - ✔✔Chemical activity in the
water is governed by temperature, with greater activity accruing at higher temperatures
and lower activity at lower.
✔✔What is a public water system? - ✔✔A public water system is any water system that
provides the public with piped water for human consumption with at least 15 connection
or regularly serves at least 25 individuals daily at-least 60 days out of the year. A public
water system is either a community water system or a non-community water system.
✔✔What happens during thermal stratification in a body of water? - ✔✔Thermal
stratification causes the bottom layer of water to lose oxygen resulting in anaerobic
decomposition of organic material. In this process, hydrogen sulfide is produced there
by lowering the pH that causes iron and manganese from the soil to become soluble.
This also causes a noticeable increase in carbon dioxide. This causes water quality
deterioration.
If the stratification layers mix (the lake turns over). Lake/Reservoir turn over occurs
when cold heavy dense water develops above warm water, light (less dense) water and
layers stabilize by exchanging places.
✔✔What is a standard solution? - ✔✔A standard solution is a solution of known
strength or concentration.
✔✔What is concentration? - ✔✔Concentration is the relationship between the amount
of solute in a solution.
✔✔At what frequency should you test your water system for radiation? - ✔✔Every 4
years
✔✔What do the absorbive properties of powder activated carbon include? - ✔✔The
absorptive properties of activated carbon include taste and odor-causing substances
and impurities such as trihilomethanes.
✔✔What levels of fluoride do and some examples - ✔✔Flouride levels above 2mg/l
cause mottling of the enamel producing a brown stain on teeth. Moderate levels (.7 to
1.0 mg/l) will reduce cavities snd dental care costs.
Some examples are sodium fluoride, sodium silicoflouride and flourosilic acid are
fluoride compounds that are added to water supplies.
✔✔What is used as backflow prevention for drinking water? - ✔✔Air gap
CORRECT QUESTIONS AND ANSWERS SURE A+
✔✔How much should you be able to expand the filer bed of a mixed media filters
without an air scour? - ✔✔The filter bed should be able to expand by at least 25%
during a backwash.
✔✔What three purposes do under-drains serve? - ✔✔1. They support the filter media
2. The collect filtrate and transport it to the manifold
3. They deliver uniform backwash and promote even filtering
✔✔What are the most important design factors for filters? - ✔✔The most important
factors are sand particle and filter bed depth
✔✔What are the protective measures for handling dry aluminum? - ✔✔1. Use of
protective equipment (clothing, gloves, footware, glasses, goggles, face shield)
2. Handle in open or well ventilated areas
3. Where dusts, mists, or aerosols may occur, use a NIOSHA approved half-face piece
cartridge air purifying respirator
4. Eye wash and shower stations available
✔✔When starting a safety program what is the first step? - ✔✔Start with a written safety
policy so that everyone understands what is required of them and what controls are in
,regard to their position and work. People then know what expectations to meet and
begin to build a good safety attitude.
✔✔What is the retention time by Texas law of records for microbiological analyses and
chemical analysis? - ✔✔Microbiological analysis is 5 years
Chemical analysis is 10 years
✔✔What does the Texas Hazard Communication Act require an employer to provide to
the employees? - ✔✔The Texas Hazards Communication act requires employers to
provide information and training to employees on the hazards of chemicals that they use
or work with.
✔✔An employee will not follow safety rules and feels like they do not have to followed.
What should an employer do? - ✔✔Document employee's actions and counsel
employee. If he does not respond discharge him.
✔✔What is one method of ensuring safety in a trench or excavation? - ✔✔One method
of ensuring safety and health of workers in a trench or excavation is to slope the sides
of the cut to the "angle of repose", or the angle closet to the perpendicular at which the
soil will remain at rest without shoring. Angle of repose is determined by soil type and
ditch conditions.
✔✔What is the minimum width for any ditch with workers? - ✔✔The minimum width for
any ditch in which workers must work is 18 inches. A ditch for water main construction
should be at least 12 inches wider than the outside pipe diameter. Ditch should be as
narrow as practical to prevent excessive trench load on the pipe. The wider the trench,
the more trench load is placed on the pipe.
✔✔What causes most underground pipe failures? - ✔✔90% of underground pipe
failures are related to improper backfill and lack of proper bedding.
✔✔An operator hears pinging in the pump. What is causing this? - ✔✔Cavitation,
caused by formation and collapse of bubbles in the water which causes noise and
vibration. Pitting of metal may result if cavitation is not eliminated.
✔✔What does a check valve on the pump discharge do? - ✔✔A check valve on the
pump discharge of a pump prevents back-flow.
✔✔Customer complains about low water pressure. What should operator do? - ✔✔All
complaints should be throughly checked out by a representative of the municipality who
can deal with the public in a calm and dignified manner. Some causes of low water
pressure are clogged screens on faucets, a lean or break in the area, flushing of water
mains, build up in pipes or meter, a partially closed valve, heavy water use during
summer and fire rescue.
, ✔✔What is the quality of raw water affected by? - ✔✔The quality of raw water in any
geographic locality is determined primarily by natural factors such as geology,
topography, and climate in each locality.
✔✔What can affect chemical activity/reactivity in water? - ✔✔Chemical activity in the
water is governed by temperature, with greater activity accruing at higher temperatures
and lower activity at lower.
✔✔What is a public water system? - ✔✔A public water system is any water system that
provides the public with piped water for human consumption with at least 15 connection
or regularly serves at least 25 individuals daily at-least 60 days out of the year. A public
water system is either a community water system or a non-community water system.
✔✔What happens during thermal stratification in a body of water? - ✔✔Thermal
stratification causes the bottom layer of water to lose oxygen resulting in anaerobic
decomposition of organic material. In this process, hydrogen sulfide is produced there
by lowering the pH that causes iron and manganese from the soil to become soluble.
This also causes a noticeable increase in carbon dioxide. This causes water quality
deterioration.
If the stratification layers mix (the lake turns over). Lake/Reservoir turn over occurs
when cold heavy dense water develops above warm water, light (less dense) water and
layers stabilize by exchanging places.
✔✔What is a standard solution? - ✔✔A standard solution is a solution of known
strength or concentration.
✔✔What is concentration? - ✔✔Concentration is the relationship between the amount
of solute in a solution.
✔✔At what frequency should you test your water system for radiation? - ✔✔Every 4
years
✔✔What do the absorbive properties of powder activated carbon include? - ✔✔The
absorptive properties of activated carbon include taste and odor-causing substances
and impurities such as trihilomethanes.
✔✔What levels of fluoride do and some examples - ✔✔Flouride levels above 2mg/l
cause mottling of the enamel producing a brown stain on teeth. Moderate levels (.7 to
1.0 mg/l) will reduce cavities snd dental care costs.
Some examples are sodium fluoride, sodium silicoflouride and flourosilic acid are
fluoride compounds that are added to water supplies.
✔✔What is used as backflow prevention for drinking water? - ✔✔Air gap
