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PH 136 > Water Supply System > Flashcards

Water Supply System Flashcards

1
Q

The pH of produced water is acidic. Why?

A

Due to absence of minerals which are supposed to neutralize acidity of water

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2
Q

Why can roofs corrode due to rain water?

A

Acidic rainwater may be exacerbated by SOx, COx and NOx

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3
Q

What is an aquifer?

A

Water-bearing strata underneath

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4
Q

Enumerate the 3 main supplies of water

A

Surface water
Ground water
Meteoric water

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5
Q

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.

A

C

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6
Q

Aside from irrigation, what is another purpose of the water in Angat Dam?

A

Energy

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7
Q

Why is MWSS asking for additional supply for domestic use from the National Water Resources Board?

A

Lack of supply because of leakage and illegal connections made by informal settlers

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8
Q

Identify the water source:

Portion of rainwater which has percolated into the earth to form undergrouna deposits in aquifers

A

Groundwater

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9
Q

What is the best material for aquifer, and why?

A

Sand. Its spaces are easily filled with water; it has sponge-like action

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10
Q

Identify source of groundwater:

Confining layer made of adobe/rock

A

Aquiclude

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11
Q

Identify source of groundwater:

Best one because it cannot be tainted by contaminants from surface

A

Confined aquifer

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12
Q

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.

A

B

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13
Q

Why is a pump needed in parking areas for ground water management?

A

Buildings have foundations that disturb the aquifer & there can be changes in pressure which can result in flow of ground water toward this area

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14
Q

Why does the water tank of CPH have high Chlorine content?

A

UPM is very near Manila Bay + Manila is below sea level; these allow seepage of salt water

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15
Q

Identify the water source:

Mixture of surface run-off and ground water. All rain water plus surface run-off with dissolved solids flow here

A

Surface water

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16
Q

This water source can become acid rain when subjected to too much air pollutants

A

Meteoric water source

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17
Q

Differentiate Public Water Supply Class I fr Public Water Supply Class II

A

Class I - require only approved disinfection to meet PNSDW

Class II - require coagulation,sedimentation,filtration & disinfection to meet PNSDW

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18
Q

Identify the water class:

Intended primarily for waters having watersheds which are uninhabited & protected from possible contamination

A

Class AA

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19
Q

What is Class B water for?

A

Primary contact recreation: bathing, swimming

20
Q

Industrial Water Supply Class I & Recreational Water Class II belong to what bigger class?

A

Class C

21
Q

Industrial Water Supply Class I - what is the exact purpose?

A

Manufacturing processes after treatment

22
Q

Recreational Water Supply Class II - what is the exact purpose?

A

Boating, activities that involve water without the contact

23
Q

What is Class D water for?

A

Agriculture, irrigation, livestock, watering

24
Q

Enumerate the different aspects of the water supply system

A

Potability
Adequacy
Source

25
Q

identify kind of water supply,based on level of service: -protected well or developed spring with outlet, but without dist system

A

level 1, or point source

26
Q

where is level 1 water supply generally found?

A

for rural areas where houses are scattered too thinly

27
Q

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

A

B

Also found in informal settlers’ area

28
Q

alternative name for level 2 water supply

A

Communal Faucet System or Standposts

29
Q

alternative name for level 3 water supply

A

Waterworks System or Individual House Connections

30
Q

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

A

D

31
Q 
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
A

B

32
Q 
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
A

D

33
Q 
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
A

C

34
Q 
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
A

C

35
Q

PD (Presidential Decree) 856 is also known as __

A

– Sanitation Code of the Philippines

36
Q

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

A

C

acrid dapat

37
Q

Enumerate 3 problems imparted by turbidity of water supply

A

aesthetics
filterability
disinfection

38
Q

How does color interfere with chlorination process?

A

reacting with chlorine to form chloroform and other trihalomethanes, or chlorinated organics

39
Q

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

A

40
Q

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

A

D

41
Q

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).

A

C

dapat alkaline ang pH + bitter taste

42
Q

What do polymers do in coagulation?

A

can be added to improve formation of clumps – acts as adhesives that form stronger bonds so that the clumps stay intact upon settling

43
Q

acceptable level of residual chlorine in water

A

0.2-0.5 ppm

44
Q

identify the process for treatment of water:

Process by which gas (usually air) and water are brought into intimate contact with each other

A

aeration

45
Q

What is this process?

Pressure-driven process that retains all ions and passes pure water

A

membrane filtration process

46
Q

purpose of aeration of water

A

Treatment for removal of taste, odor, minerals and dissolved gases:

47
Q

purpose of membrane filtration process

A

treatment for hardness

PH 136 (18 decks)

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