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WorksheetsSVN3M - Liquid Waste Review
Total questions: 20
Worksheet time: 14mins
What is the system where the sewage and the rain water in the drains mix together and flow into water systems
Primary sewage treatment
Combined sewage overflow
Storm water pipes
Surface water sewage system
During secondary treatment in the aeration tanks, what is working on the sewage waste?
micro-organisms
humans
air titration
oxidation/reduction
What are two things that water treatment plants need to do?
Clean and disinfect the water
Boil and evaporate the water
Remove the animals and plants
Add chemicals and remove pesticides
This picture shows....
irrigation
aeration
chlorination
filtering
What is removed in primary phase wastewater treatment, as the wastewater is sent to a settling tank and left undisturbed?
bacteria
pathogens
sludge
plastic bags and other big non-biodegradable garbage
In a wastewater treatment plant, what gas must be maintained at precise levels in the aeration tank?
CO2
O2
H2
CO
Certain types of bacteria are beneficial to wastewater treatment because
they naturally break down organic matter
they help solid material to settle out of the wastewater
the nutrients produced are beneficial to the treated water
they aren't beneficial
A series of underground pipes that carry used water to a treatment plant is called what?
Filtration system
Sewer system
Septic System
Drainage system
A healthy water system would have a pH of what?
0-2
4-7
6-8
10-12
A positive coliform bacteria count in water samples would indicate what about the water?
it is contaminated by pesticides
it is contaminated by hot water
it is contaminated by mercury
it is contaminated by sewage
How do many homes in rural areas treat wastewater?
with an artesian well
with a septic tank
through coagulation
through filtration
Where does the water from the wastewater treatment plant go?
Back to homes to be reused
To the drinking water facility
To a body of water such as a lake or river
Soaks back into the ground
A component of a septic system, made up of underground pipes laid out below the surface of the ground.
Septic system
Septic tank
leach field
all of these
A body of water that has high turbidity would be:
Cloudy
Clear
Acidic
Basic
What is grey water
toilet water
waste water from wash basins, showers, baths and sinks
recycled rainwater
fresh water
What can grey water be used for
washing vehicles
drinking
washing dishes
washing food
What cannot grey water be used for
flushing toilets
watering gardens
personal hygiene
washing clothes
NTU is the unit of measurement for what property in water?
Number of bacteria in the water
Turbidity of the water
Amount of nitrates in the water
Amount of dissolved oxygen in the water
