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WorksheetsWATER SUPPLY
Total questions: 15
Worksheet time: 22mins
Water supply is:
A. To supply water for agricultural use
B. To supply water for industrial use
C. To supply water for commercial use
D. To supply water for community use as for specific purposes
Water can be extracted from sources such:
A. Rivers and lakes
B. State Authorities
C. Rain water gutter
D. Public Donation
The following statements are true about hard water, EXCEPT:
A. Occurs due to the presence of calcium or magnesium salts
B. Low or have no bicarbonate salts
C. The hardness can be remove by boiling process
D. The hardness can be remove by Base Exchange Process
- Easier to obtain lather in soap
-Contains of high oxygen (O2)
-Free from dissolved salts of magnesium and calcium
The above statements are refer to:
A. Hard Water
B. Soft water
Choose the correct answer for a characteristic of hard water:
A. Contains sodium ions only
B. Foam is produced due to the good effect of soap
C. Formed when water flows through limestone and chalk
D. Produced by passing hard water over an ion exchange resin
Water treatment aims to:
A. To improve the colour of water
B. To increase the mineral content in water
C. To reduce the formed of foam
To improve the quality of water which meets the standard to be safely used for specific purposes
There are several stages of water treatment such screening, _______, flocculation, _______, coagulation, flouridation, _______, filtration,
_______ and conditioning. The blank answers are:
A. Aeration, Evaporation,
Oxidation and Condensation
B. Chlorination, 2nd filtration, oxidation and precipitation
C. Precipitation, Evaporation, Condensation and Infiltration
D. Aeration, Chlorination, sedimentation and 2nd Chlorination
In this water treatment process, the slaked lime will be added. This is refer to:
A. Aeration
B. Screening
C. Flouridation
D. Conditioning
Sedimentation process are to:
A. Ease the flocculation process
B. Prevent pumps being damaged by the debris
C. Sink the heavy particles to the bottom of the tanks which leaving clear water on top
D. To obtain clear water
A specific dose of chlorine is added to clear water. This is refer to:
A. Chlorination
B. Filtration
C. 2nd Chlorination
D. Conditioning
Method of coagulation process is by:
A. Using beds of sands of different sizes or using quick gravity method
B. Added aluminium sulphate
C. Mixed a specific dosage of fluoride
D. Using the rows of obstruction planks
The purpose of aeration process is:
A. To reduce odours and unpleasant taste
B. To neutralize acidic characteristic of water
C. To gathered up the tiny particles and sink to the bottom of the tank
D. To prevent tooth caries among children
The carbon dioxide in the water will be reduced and the oxygen will be dissolved in the water. This is refer to:
A. Conditioning
B. Sedimentation
C. Screening
D. Aeration
In coagulation process, flocs will become unstable due to:
A. The used of specific chlorine
B. The used of ammonia
C. The used of alum or aluminium sulphate
D. The use of beds of sands
The tiny particles in the water that can't be isolated by the screening and sedimentation process will be isolate through:
A. Chlorination
B. Flouridation
C. Filtration
D. Flocculation
