Question 1
As you know from previous readings, the composition of soil is very important in the
removal of both viruses and bacteria. Which of the following soil conditions is the most
favorable for removal of viruses?
a. Sand over gravel
b. Fine loamy sand over course sand and gravel
c. Gravel over semi-porous clay
d. Course sand and gravel over fine sand or clay
CORRECT ANSWER
b. Fine loamy sand over course sand and gravel
Question 2
Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate past or possibly intermittent pollution?
a. Fecal Streptococci
b. Eschrichia coli
c. Aerobacter Aerogenes
d. Clostridium Sporulates
CORRECT ANSWER
d. Clostridium Sporulates
1
@THE STUDY VAULT
,Question 3
Which of the following wells is considered the most dependable source of water and is
less likely to become contaminated?
a. Driven well
b. Bored well
c. Drilled well
d. Dug well
CORRECT ANSWER
c. Drilled well
Question 4
Which of the following is not considered a satisfactory solution to the problem of chemical
contamination in well systems?
a. Abandoning the well
b. Boiling the water
c. Connecting to a public water system
d. Building a new, properly constructed, drilled well
CORRECT ANSWER
b. Boiling the water
Question 5
Which of the following chemicals is most widely used to destroy microorganisms?
2
@THE STUDY VAULT
,a. Chlorine
b. Copper sulfate
c. Chloramine
d. Hydrogen sulfate
CORRECT ANSWER
a. Chlorine
Question 6
Which of the following is the best method of backflow control?
a. Air gap separation
b. Vacuum breaker
c. Backflow preventer
d. Barometric loops
CORRECT ANSWER
a. Air gap separation
Question 7
Microscopic photosynthetic plants of the simplest forms, having neither roots, stems, nor
leaves, that are associated with taste and odor, filter clogging, and other water problems
are known as:
a. Yeasts
b. Algae
c. Protozoa
d. Rotifers
3
@THE STUDY VAULT
, CORRECT ANSWER
b. Algae
Question 8
Control of infectious, intestinal diseases of humans requires:
a. Provisions of safe water supplies
b. Proper waste disposal
c. Personal hygiene
d. All of the above
CORRECT ANSWER
d. All of the above
Question 9
Drinking water standards generally specify that water is safe provided that testing in a
specified manner does not reveal more than an average of:
a. 10 positive samples out of 100 samples taken
b. 50 coliform organisms per 100 ml
c. 1 positive sample out of 40 samples taken
d. 50 coliform organisms per 200 ml
CORRECT ANSWER
c. 1 positive sample out of 40 samples taken
4
@THE STUDY VAULT
As you know from previous readings, the composition of soil is very important in the
removal of both viruses and bacteria. Which of the following soil conditions is the most
favorable for removal of viruses?
a. Sand over gravel
b. Fine loamy sand over course sand and gravel
c. Gravel over semi-porous clay
d. Course sand and gravel over fine sand or clay
CORRECT ANSWER
b. Fine loamy sand over course sand and gravel
Question 2
Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate past or possibly intermittent pollution?
a. Fecal Streptococci
b. Eschrichia coli
c. Aerobacter Aerogenes
d. Clostridium Sporulates
CORRECT ANSWER
d. Clostridium Sporulates
1
@THE STUDY VAULT
,Question 3
Which of the following wells is considered the most dependable source of water and is
less likely to become contaminated?
a. Driven well
b. Bored well
c. Drilled well
d. Dug well
CORRECT ANSWER
c. Drilled well
Question 4
Which of the following is not considered a satisfactory solution to the problem of chemical
contamination in well systems?
a. Abandoning the well
b. Boiling the water
c. Connecting to a public water system
d. Building a new, properly constructed, drilled well
CORRECT ANSWER
b. Boiling the water
Question 5
Which of the following chemicals is most widely used to destroy microorganisms?
2
@THE STUDY VAULT
,a. Chlorine
b. Copper sulfate
c. Chloramine
d. Hydrogen sulfate
CORRECT ANSWER
a. Chlorine
Question 6
Which of the following is the best method of backflow control?
a. Air gap separation
b. Vacuum breaker
c. Backflow preventer
d. Barometric loops
CORRECT ANSWER
a. Air gap separation
Question 7
Microscopic photosynthetic plants of the simplest forms, having neither roots, stems, nor
leaves, that are associated with taste and odor, filter clogging, and other water problems
are known as:
a. Yeasts
b. Algae
c. Protozoa
d. Rotifers
3
@THE STUDY VAULT
, CORRECT ANSWER
b. Algae
Question 8
Control of infectious, intestinal diseases of humans requires:
a. Provisions of safe water supplies
b. Proper waste disposal
c. Personal hygiene
d. All of the above
CORRECT ANSWER
d. All of the above
Question 9
Drinking water standards generally specify that water is safe provided that testing in a
specified manner does not reveal more than an average of:
a. 10 positive samples out of 100 samples taken
b. 50 coliform organisms per 100 ml
c. 1 positive sample out of 40 samples taken
d. 50 coliform organisms per 200 ml
CORRECT ANSWER
c. 1 positive sample out of 40 samples taken
4
@THE STUDY VAULT
