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Water To Drink
Test Description: Treating drinking water
Instructions: Answer all questions to get your test result.
1) Which of the following is not a common source of drinking water?
A
reservoirs
B
aquifers
C
rivers
D
icebergs
2) The pH of water is a measure of its
A
saltiness
B
color
C
acidity
D
cloudiness
3) Pure water is neutral, meaning it is neither an acid nor a base. Pure water has a pH of
A
10
B
7
C
14
D
0
4) Hard water contains high levels of
A
calcium and magnesium
B
escherichia coli
C
sewage
D
soapsuds
5) The first step in treating water from a river or lake is usually
A
coagulation
B
filtration
C
chlorination
D
concentration
6) The amount of one substance in a certain volume of another substance is its
A
filtration
B
coagulation
C
desalination
D
concentration
7) Why is chlorine added to drinking water?
A
chlorine prevents water from becoming cloudy
B
chlorine softens hard water
C
chlorine kills disease-causing microorganisms
D
chlorine improvs the taste of water
8) What enables water to move through a system of pipes?
A
hardness
B
water pressure
C
water quality
D
pH
9) Household wastewater and the wastes in it are called
A
sludge
B
gray water
C
sewage
D
flocs
10) Many homes that are not connected to public sanitary sewers might dispose of sewage using a(n)
A
septic system
B
reservoir
C
well
D
aquifer
11) A condition in which an area with normally good precipitation gets scares rainfall for a few years is a
A
drought
B
pollutant
C
demand
D
floc
12) Using a resource wisely so that it will not be used up is called
A
conservation
B
distillation
C
filtration
D
coagulation
13) The process of obtaining fresh water from salt water is called...
A
coagulation
B
filtration
C
desalination
D
conservation
14) Which of the following is a way to conserve water?
A
letting the water run while you brush your teeth
B
using open ditches to carry water for irrigation
C
reusing water in a factory to cool hot machinery
D
taking longer showers
*select an answer for all questions
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