Water Supply System Flashcards
The pH of produced water is acidic. Why?
Due to absence of minerals which are supposed to neutralize acidity of water
Why can roofs corrode due to rain water?
Acidic rainwater may be exacerbated by SOx, COx and NOx
What is an aquifer?
Water-bearing strata underneath
Enumerate the 3 main supplies of water
Surface water
Ground water
Meteoric water
Which is false?
A.In the Philippines, as of now, there is enough available water to supply the water demand
B.Envionmental sanitation & wastewater treatment are part of the Maynilad bill.
C.There are known adverse health effects in consuming water with chloride.
C
Aside from irrigation, what is another purpose of the water in Angat Dam?
Energy
Why is MWSS asking for additional supply for domestic use from the National Water Resources Board?
Lack of supply because of leakage and illegal connections made by informal settlers
Identify the water source:
Portion of rainwater which has percolated into the earth to form undergrouna deposits in aquifers
Groundwater
What is the best material for aquifer, and why?
Sand. Its spaces are easily filled with water; it has sponge-like action
Identify source of groundwater:
Confining layer made of adobe/rock
Aquiclude
Identify source of groundwater:
Best one because it cannot be tainted by contaminants from surface
Confined aquifer
Which is false?
A.Water with hardness is good for people with heart diseases.
B.Confined aquifers cannot be contaminated by sea water.
C.Water with hardness needs higher energy to boil.
B
Why is a pump needed in parking areas for ground water management?
Buildings have foundations that disturb the aquifer & there can be changes in pressure which can result in flow of ground water toward this area
Why does the water tank of CPH have high Chlorine content?
UPM is very near Manila Bay + Manila is below sea level; these allow seepage of salt water
Identify the water source:
Mixture of surface run-off and ground water. All rain water plus surface run-off with dissolved solids flow here
Surface water
This water source can become acid rain when subjected to too much air pollutants
Meteoric water source
Differentiate Public Water Supply Class I fr Public Water Supply Class II
Class I - require only approved disinfection to meet PNSDW
Class II - require coagulation,sedimentation,filtration & disinfection to meet PNSDW
Identify the water class:
Intended primarily for waters having watersheds which are uninhabited & protected from possible contamination
Class AA
What is Class B water for?
Primary contact recreation: bathing, swimming
Industrial Water Supply Class I & Recreational Water Class II belong to what bigger class?
Class C
Industrial Water Supply Class I - what is the exact purpose?
Manufacturing processes after treatment
Recreational Water Supply Class II - what is the exact purpose?
Boating, activities that involve water without the contact
What is Class D water for?
Agriculture, irrigation, livestock, watering
Enumerate the different aspects of the water supply system
Potability
Adequacy
Source
identify kind of water supply,based on level of service: -protected well or developed spring with outlet, but without dist system
level 1, or point source
where is level 1 water supply generally found?
for rural areas where houses are scattered too thinly
false about level 2 water supply
A.System with source, with reservoir, piped distribution network and communal faucets
B. Found in rural areas only
C. Serves an average of 100 households, with 4 to 6 households per faucet
D. Generally, for rural and urban areas where houses are clustered densely to justify a simple piped system
B
Also found in informal settlers’ area
alternative name for level 2 water supply
Communal Faucet System or Standposts
alternative name for level 3 water supply
Waterworks System or Individual House Connections
false about level 3 water supply
A.With source, a reservoir, a piped distribution network and household taps
B.1 or more faucets per household
C.Generally, for densely populated urban areas
D.Does not require a minimum treatment of disinfection
D
Enforces water quality and effluent standards; Monitors surface water quality according to class; Regulates industry water A. Department of Health B. Environmental Management Bureau C. National Water Resources Board D. AOTA
B
Bank/lending institution to improve local district’s water supply project; promotes and oversees the development of provincial waterworks and sewage; Funds projects that it deems feasible A. Department of Health B. Environmental Management Bureau C. National Water Resources Board D. Local Water Utilities Administration
D
Regulates use of water sources; Overall coordination of water resource management and development; gives permit for commercial deep wells A. Department of Health B. Environmental Management Bureau C. National Water Resources Board D. Local Water Utilities Administration
C
monitors over-extraction of water from aquifers in order to prevent collapse of the aquifer and the structures above it (ex. Laguna lake) A. Department of Health B. Environmental Management Bureau C. National Water Resources Board D. Local Water Utilities Administration
C
PD (Presidential Decree) 856 is also known as __
– Sanitation Code of the Philippines
Which is false?
A. iron imparts yellow stain & rusty taste to water
B. manganese imparts black stain to water
C. alkaline water tastes sweet
D. NOTA
C
acrid dapat
Enumerate 3 problems imparted by turbidity of water supply
aesthetics
filterability
disinfection
How does color interfere with chlorination process?
reacting with chlorine to form chloroform and other trihalomethanes, or chlorinated organics
False about Mineral acidity
A.makes water palatable that increases consumption;
B. corrosivity of water and potential for leaching heavy metals
C. BOTA
D. NOTA
A
False about inorganic colloids
A.clay, iron or manganese oxides
B.Neutral inorganic molecules and particles
C.Industrial wastes from china clay or paper processing
D.not a component of sewage solids
D
Which is false?
A.Oxygen and carbon dioxide are naturally occurring, and too much cause negative effects on the quality of water.
B. The smell of chlorine in household tap water indicates presence of residual chlorine which can keep the water clean even with contamination in the pipeline.
C. Algal growth removes CO2 and produce and raise O2 levels to super saturation in daytime during photosynthesis, giving the water a sour taste (low pH).
C
dapat alkaline ang pH + bitter taste
What do polymers do in coagulation?
can be added to improve formation of clumps – acts as adhesives that form stronger bonds so that the clumps stay intact upon settling
acceptable level of residual chlorine in water
0.2-0.5 ppm
identify the process for treatment of water:
Process by which gas (usually air) and water are brought into intimate contact with each other
aeration
What is this process?
Pressure-driven process that retains all ions and passes pure water
membrane filtration process
purpose of aeration of water
Treatment for removal of taste, odor, minerals and dissolved gases:
purpose of membrane filtration process
treatment for hardness
