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2024 WATER TREATMENT OIT TEST EXAM WITH CORRECT ANSWERS
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2024 WATER TREATMENT OIT TEST EXAM WITH CORRECT ANSWERS
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2024 WATER TREATMENT OIT TESTEXAM WITH CORRECT ANSWERS
Which of the following is NOT an example of PPE (Personal Protective
Equipment)?
a) Exhaust fan
b) SCBA
c) Face shield
d) Traffic vest - CORRECT-ANSWERSa) Exhaust fan
Water entering a wastewater treatment plant will pass through a bar screen.
The bar screen is designed to remove which of the following items?
a) dissolved solids
b) grit and sand
c) large objects
d) nutrients - CORRECT-ANSWERSc) large objects
What units are used to measure water pressure?
a) Kilowatts
b) Kilopascals
c) Horsepower
d) Head units - CORRECT-ANSWERSb) Kilopascals
Define the term 'supernatant'
a) a solution which is supersaturated
b) a substance used to reduce odour in polluted waters
c) the liquid located above a sediment or precipitate
d) an operator who is extremely proficient in fulfilling their duties - CORRECT-
ANSWERSc) the liquid located above a sediment or precipitate
A __________ is used to move wastewater from a wastewater lift station to an
elevated gravity sewer:
a) sewer lateral
b) force main
, c) sanitary trunk main
d) transmission main - CORRECT-ANSWERSb) force main
What happens when a sewer is surcharged?
a) infiltration of ground water into sewers
b) flushing a sewer with clean water to clean debris away
c) hydraulically overloading a sewer
d) taxing a customer's water bill to pay for collection devices - CORRECT-
ANSWERSc) hydraulically overloading a sewer
Which of the following infectious diseases can be transmitted through
domestic wastewater?
a) hepatitis
b) giardiasis
c) cryptosporidiosis
d) all of the above - CORRECT-ANSWERSd) all of the above
What is meant by the term "combined sewers"?
a) industrial sewage and domestic sewage are collected in the same sewers
b) stormwater and sewage are collected in the same sewers
c) the main sewer line which takes all of a city's sewage to the treatment
plant
d) a sewer which contains both gravity sewers and force mains - CORRECT-
ANSWERSb) stormwater and sewage are collected in the same sewers
Why is hydrogen sulphide gas a problem in sewers?
a) results in an increase in rodent populations
b) the gas can block the flow of sewage
c) since it is odourless, workers will not know when they are exposed
d) leads to corrosion of certain types of sewers - CORRECT-ANSWERSd) leads
to corrosion of certain types of sewers
Why is a minimum wastewater velocity of 0.6 m (2.0 feet) per second
necessary in a gravity sewer?
a) it will ensure that sewage has enough velocity to go up minor increases in
sewer elevation
b) it will prevent the growth of roots in sewers
c) it will prevent the erosion of the bottom of the sewer
d) it will prevent the build up of solids in the sewer - CORRECT-ANSWERSd) it
will prevent the build up of solids in the sewer
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