a. calcium sulfate
b. magnesium sulfate
c. calcium chloride
d. sodium chloride
sodium chloride
Question 52
Marks: 1
One of the most common reasons for the contamination of wells drilled through rock, clay, or hardpan is
Choose one answer.
a. seepage of pollutants through soil
b. failure to seal well casings properly
c. porosity of the rock
d. use of inferior quality well casings
failure to seal well casings properly
Question 53
Marks: 1
A jet pump will lift water a maximum of
Choose one answer.
a. 500 feet
b. 120 feet
c. 33.9 feet
d. 15 feet
120 feet
Question 54
Marks: 1
, The quiescent settling of water such as would occur in a reservoir, lake or basin without the aid of chemicals is
known as
Choose one answer.
a. plain sedimentation
b. coagulation
c. settling
d. flocculation
plain sedimentation
Question 55
Marks: 1
If sufficient amounts of activated carbon in the powdered form are used, practically all tastes and odors are removed
from water by
Choose one answer.
a. absorption
b. polymerization
c. adsorption
d. oxidation
adsorption
Question 56
Marks: 1
High concentrations of nitrates in drinking water are
Choose one answer.
a. detrimental to adults
b. considered safe to drink
c. the cause of a blood disease in teenagers
b. magnesium sulfate
c. calcium chloride
d. sodium chloride
sodium chloride
Question 52
Marks: 1
One of the most common reasons for the contamination of wells drilled through rock, clay, or hardpan is
Choose one answer.
a. seepage of pollutants through soil
b. failure to seal well casings properly
c. porosity of the rock
d. use of inferior quality well casings
failure to seal well casings properly
Question 53
Marks: 1
A jet pump will lift water a maximum of
Choose one answer.
a. 500 feet
b. 120 feet
c. 33.9 feet
d. 15 feet
120 feet
Question 54
Marks: 1
, The quiescent settling of water such as would occur in a reservoir, lake or basin without the aid of chemicals is
known as
Choose one answer.
a. plain sedimentation
b. coagulation
c. settling
d. flocculation
plain sedimentation
Question 55
Marks: 1
If sufficient amounts of activated carbon in the powdered form are used, practically all tastes and odors are removed
from water by
Choose one answer.
a. absorption
b. polymerization
c. adsorption
d. oxidation
adsorption
Question 56
Marks: 1
High concentrations of nitrates in drinking water are
Choose one answer.
a. detrimental to adults
b. considered safe to drink
c. the cause of a blood disease in teenagers
