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Basic Wastewater Operations Exam Practice Questions and Answers

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Basic Wastewater Operations Exam Practice Questions and Answers What are the types of water resources in Texas? - ANSWER-Lakes and rivers, bays and estuaries, wetlands and groundwater What happens when poorly treated wastewater discharges into a water resource? - ANSWER- decreases the oxygen l...

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Basic Wastewater Operations Exam

Practice Questions and Answers

What are the types of water resources in Texas? - ANSWER✔✔-Lakes and rivers, bays and estuaries,

wetlands and groundwater

What happens when poorly treated wastewater discharges into a water resource? - ANSWER✔✔-

decreases the oxygen level and introduce pollutants into water sources, causing fish kills.

What is a fish kill? - ANSWER✔✔-a mass extinction or death of aquatic life in a river, lake or stream

Groundwater - ANSWER✔✔-The supply of fresh water under Earth's surface that is stored in

underground aquifers.

Groundwater is primarily used for - ANSWER✔✔-small public water systems and agricultural irrigation.

Pollutant - ANSWER✔✔-Anything that affects the original water quality. includes organic and inorganic

materials, heat and radiation.

contaminant - ANSWER✔✔-A health threat

What are the two categories of water contamination - ANSWER✔✔-Point-source discharge and non-

point-source discharges

Point-source dischare - ANSWER✔✔-Come from pipes or concrete ditches that are monitored, controlled

and inspected.

Non-point-source discharge - ANSWER✔✔-intermittent, dispersed flows having little or no control.

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Benefits or treating point-source and non-point-source wastes: - ANSWER✔✔-1. Prevention of water

pollution

2. Protection of human and animal health

3. Prevention of Dissolved Oxygen depletion in water

4. Prevention of nutrients which cause algae blooms (EUTROPHICATION)

Water quality goals: stream standards - ANSWER✔✔-The state of TX sets quality standards on rivers and

streams, depending on the water's use. Water used for contact recreation and public water supply have

stricter standards than water used for industrial barge traffic.

Discharge limitations - ANSWER✔✔-Permits issued for waste discharges. Permits can be stricter when

effluent discharges into water used for drinking or swimming, and also if the receiving stream or lake has

multiple discharges or large volumes of waste.

What is the maximum fine for polluting state water? - ANSWER✔✔-As much as $25,000 per day.

Who are the biggest groundwater contaminators? - ANSWER✔✔-Cities and municipalities

blue baby syndrome - ANSWER✔✔-The illness that occurs when we have too much nitrates in our water,

especially in children. Nitrates bind to hemaglobin in blood and deprive oxygen transfer throughout the

body.

hydrological cycle (water cycle) - ANSWER✔✔-the movement of water through the environment from

the atmosphere to Earth and back

Evaporation - ANSWER✔✔-The change of state from a liquid to a gas, from bodies of water.

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Transpiration - ANSWER✔✔-Evaporation of water from the leaves of a plant. a general term for water

given off by earth's surface.

sublimation - ANSWER✔✔-A change directly from the solid to the gaseous state without becoming liquid

(ice)

Condensation - ANSWER✔✔-The change of state from a gas to a liquid. Needs a solid surface to form

(dust and dirt particles in atmosphere).

Precipitation - ANSWER✔✔-Any form of water that falls from clouds and reaches Earth's surface.

Infiltrates top 1" of soil, will infiltrate rootzone, and recharge watershed or will runoff.

Infiltration - ANSWER✔✔-Downward movement of water through soil.

streamflow - ANSWER✔✔-the speed and amount of water discharged by a watershed

Ground water storage - ANSWER✔✔-Large amounts of water are stored here. The water is still moving,

possibly very slowly, and it is still part of the water cycle. Most of the water here comes from

precipitation that infiltrates downward from the land surface. Another term for this is "aquifer," although

this term is usually used to describe water-bearing formations capable of yielding enough water to

supply peoples' uses. Aquifers are a huge storehouse of Earth's water and people all over the world

depend on it in their daily lives.

What is the human water cycle - ANSWER✔✔-Water begins at source (lakes rivers streams), is treated

for drinking, travels through the distribution system to be brought to the consumer and generator, the

water is then used and sent to the collection system where it makes it's way to the wastewater

treatment plant and then discharged into the water source.

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