SANITARIAN WRITTEN EXAM
REVIEWED QUESTIONS WITH VERIFIED
ANSWERS [2026/2027]
Infectious hepatitis is an important, but poorly understood disease according to present day
knowledge. Which of the following statements is TRUE regarding this disease? - Correct Answers
-The agent occurs in both the blood & feces of patients
Outbreaks of many diseases have been traced to un-pasteurized milk as the source of
transmission. Which of the following diseases would NOT be transmitted this way? - Correct
Answers -Dengue
An outbreak of trachoma (pink eye) was traced to a public swimming pool. Which of the
following is the MOST likely cause? - Correct Answers -The use of community towels.
Which of the following areas would be LEAST closely associated with infant mortality rate in a
community? - Correct Answers -Auto Accidents
Office of Health Service regulations require bacteriological drinking water samples to be
analyzed by the laboratory within ______ hours after collection - Correct Answers -30
The GREATEST advantage offered by the membrane filter technique over the multiple tube test
is - Correct Answers -Results are obtained in a shorter time
The primary purpose of rapid & filtration & coagulation in the water treatment process is to
remove - Correct Answers -Turbidity
How many pounds of calcium hypochlorite (70% available chlorine) are necessary to make 25
gallons of 1% chlorine solution? - Correct Answers -3
, Recommended guidelines for protecting a water well against contamination would include all
EXCEPT which one of the following? - Correct Answers -The well should be protected by a pump
house
A water supply from which one of the following sources is the MOST likely to be safe for human
consumption - Correct Answers -Drilled well
The LEAST important public health reason for treating sewage is to prevent - Correct Answers -
Unsightly conditions.
Digestion of organic matter in a septic tank is accomplished primarily - Correct Answers -By
anaerobic bacteria.
Problems with grease traps in restaurants are MOST often caused by - Correct Answers -Lack of
maintenance
Which one of the following would be the LEAST suspected cause of a tile field system
(absorption system) failure? - Correct Answers -Deterioration of the tile
Oxidation ponds operate on the principle of: - Correct Answers -Algae furnishing oxygen for
aerobic action
Water drawn from a swimming pool for filtration should come from - Correct Answers -Both the
surface & the deepest part of the pool
The recommended free chlorine residual to be maintained thru-out a water supply distribution
system is - Correct Answers -4 ppm
REVIEWED QUESTIONS WITH VERIFIED
ANSWERS [2026/2027]
Infectious hepatitis is an important, but poorly understood disease according to present day
knowledge. Which of the following statements is TRUE regarding this disease? - Correct Answers
-The agent occurs in both the blood & feces of patients
Outbreaks of many diseases have been traced to un-pasteurized milk as the source of
transmission. Which of the following diseases would NOT be transmitted this way? - Correct
Answers -Dengue
An outbreak of trachoma (pink eye) was traced to a public swimming pool. Which of the
following is the MOST likely cause? - Correct Answers -The use of community towels.
Which of the following areas would be LEAST closely associated with infant mortality rate in a
community? - Correct Answers -Auto Accidents
Office of Health Service regulations require bacteriological drinking water samples to be
analyzed by the laboratory within ______ hours after collection - Correct Answers -30
The GREATEST advantage offered by the membrane filter technique over the multiple tube test
is - Correct Answers -Results are obtained in a shorter time
The primary purpose of rapid & filtration & coagulation in the water treatment process is to
remove - Correct Answers -Turbidity
How many pounds of calcium hypochlorite (70% available chlorine) are necessary to make 25
gallons of 1% chlorine solution? - Correct Answers -3
, Recommended guidelines for protecting a water well against contamination would include all
EXCEPT which one of the following? - Correct Answers -The well should be protected by a pump
house
A water supply from which one of the following sources is the MOST likely to be safe for human
consumption - Correct Answers -Drilled well
The LEAST important public health reason for treating sewage is to prevent - Correct Answers -
Unsightly conditions.
Digestion of organic matter in a septic tank is accomplished primarily - Correct Answers -By
anaerobic bacteria.
Problems with grease traps in restaurants are MOST often caused by - Correct Answers -Lack of
maintenance
Which one of the following would be the LEAST suspected cause of a tile field system
(absorption system) failure? - Correct Answers -Deterioration of the tile
Oxidation ponds operate on the principle of: - Correct Answers -Algae furnishing oxygen for
aerobic action
Water drawn from a swimming pool for filtration should come from - Correct Answers -Both the
surface & the deepest part of the pool
The recommended free chlorine residual to be maintained thru-out a water supply distribution
system is - Correct Answers -4 ppm
