Question 1
Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate past of possibly intermittent pollution?
a. fecal streptococci
b. eschericha coli
c. aerobacter aerogenes
d. clostridium sporulates
CORRECT ANSWER
clostridium sporulates
Question 2
The presence of which of the following is most easily identified by laboratory analysis in
water contaminated by feces?
a. shigella dysenteriae
b. coliform
c. entamoeba histolytica
d. salmonella typhosa
CORRECT ANSWER
coliform
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,Question 3
Which of the following disinfecting compounds can be used in full strength for
disinfecting?
a. perchloron
b. calcium hypochlorite
c. chlorinated lime
d. sodium hypochlorite
CORRECT ANSWER
sodium hypochlorite
Question 4
This substance is the first product of the decomposition of organic matter. its presence in
water usually indicates "fresh pollution" of sanitary significance. what is it?
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
CORRECT ANSWER
ammonia
Question 5
The presence of which of the following elements in water treatment plant effluent is used
as a measure of filtration efficiency?
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,a. copper
b. aluminum
c. zinc
d. lead
CORRECT ANSWER
aluminum
Question 6
Which of the following is not used to disinfect water?
a. chlorine
b. bromine
c. fluorine
d. iodine
CORRECT ANSWER
fluorine
Question 7
The presence of which of the following in water would indicate past of possibly
intermittent pollution?
a. streptococcus fecalis
b. escherichia coli
c. clostridium perfringens
d. enterococci
CORRECT ANSWER
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@THE STUDY VAULT
, clostridium perfringens
Question 8
Often over 90% of sodium arsenate can be removed by
a. filtration
b. coagulation
c. ion exchange
d. all of the above
CORRECT ANSWER
coagulation
Question 9
Reduction of the level of fluorides in drinking water can be accomplished by
a. coagulation
b. lime softening
c. ion exchange
d. all of the above
CORRECT ANSWER
all of the above
Question 10
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@THE STUDY VAULT
Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate past of possibly intermittent pollution?
a. fecal streptococci
b. eschericha coli
c. aerobacter aerogenes
d. clostridium sporulates
CORRECT ANSWER
clostridium sporulates
Question 2
The presence of which of the following is most easily identified by laboratory analysis in
water contaminated by feces?
a. shigella dysenteriae
b. coliform
c. entamoeba histolytica
d. salmonella typhosa
CORRECT ANSWER
coliform
1
@THE STUDY VAULT
,Question 3
Which of the following disinfecting compounds can be used in full strength for
disinfecting?
a. perchloron
b. calcium hypochlorite
c. chlorinated lime
d. sodium hypochlorite
CORRECT ANSWER
sodium hypochlorite
Question 4
This substance is the first product of the decomposition of organic matter. its presence in
water usually indicates "fresh pollution" of sanitary significance. what is it?
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
CORRECT ANSWER
ammonia
Question 5
The presence of which of the following elements in water treatment plant effluent is used
as a measure of filtration efficiency?
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@THE STUDY VAULT
,a. copper
b. aluminum
c. zinc
d. lead
CORRECT ANSWER
aluminum
Question 6
Which of the following is not used to disinfect water?
a. chlorine
b. bromine
c. fluorine
d. iodine
CORRECT ANSWER
fluorine
Question 7
The presence of which of the following in water would indicate past of possibly
intermittent pollution?
a. streptococcus fecalis
b. escherichia coli
c. clostridium perfringens
d. enterococci
CORRECT ANSWER
3
@THE STUDY VAULT
, clostridium perfringens
Question 8
Often over 90% of sodium arsenate can be removed by
a. filtration
b. coagulation
c. ion exchange
d. all of the above
CORRECT ANSWER
coagulation
Question 9
Reduction of the level of fluorides in drinking water can be accomplished by
a. coagulation
b. lime softening
c. ion exchange
d. all of the above
CORRECT ANSWER
all of the above
Question 10
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@THE STUDY VAULT
