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2024 WATER TREATMENT OIT TEST WITH 300 QUESTIONS AND CORRECT ANSWERS/ WATER TREATMENT OPERATOR IN TRAINING PRACTICE TEST LATEST 2024/2025 (NEWEST!)$25.99
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2024 WATER TREATMENT OIT TEST
WITH 300 QUESTIONS AND CORRECT
ANSWERS/ WATER TREATMENT
OPERATOR IN TRAINING PRACTICE
TEST LATEST 2024/2025 (NEWEST!)
Which of the following are operators-in-training NOT allowed to do?
a) There are no restrictions on the duties of an operator-in-training
b) Any operational duties if not in the presence of another operator
c) Anything which could effect the quality of the water/wastewater
d) Be the operator with overall operational responsibility of the system -
ANSWER-d) Be the operator with overall operational responsibility of the system
When operating a pump, an operator feels a vibration and hears a slight hammering
noise.
a) water hammer
b) cavitation - ANSWER-b) cavitation
What is the name of the valve which connects the customer's service line to the
municipal water line?
Secondary treatment typically removes ______ of the BOD and suspended solids.
a) 20-39%
b) 40-59%
c) 60-79%
d) 80-99% - ANSWER-d) 80-99%
The chlorine room should be constructed so it can be entered only from the -
ANSWER-Outside of the building.
A rectangular ground storage tank is 60-ft wide, 120-ft long, and 12-ft deep. The
tank holds ____ gal. - ANSWER-646,272 gal.
1 (cubed) ft of water weighs 62.4 lbs. 1 (square) ft of water equals 144 (square)
inches. Therefore, 62.4 lbs / 144 = 0.43 PSI per ft. - ANSWER-P = 0.43 X Height
A tank holding 2340 gal fills in 12 min. The rate of flow is ____ gpm. - ANSWER-
195 gpm.
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
pg. 2
,c) large objects
d) nutrients - ANSWER-c) large objects
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 - ANSWER-c)
the liquid located above a sediment or precipitate
Which of the following is a source of excessively clear water in a collection
system?
a) infiltration from a high water table
b) exfiltration from a high water table
c) excessive recirculation
d) inverted siphon - ANSWER-a) infiltration from a high water table
Who is primary responsible for your safety?
a) you
b) employer
c) MOE
d) government - ANSWER-a) you
pg. 3
, 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 - ANSWER-b) force main
In an activated sludge process, some of the sludge collected in the secondary
sedimentation tank is returned to the _______ to maintain the mass of the mixed
liquor.
a) grit channel
b) aeration tank
c) primary sedimentation tank
d) digester - ANSWER-b) aeration tank
Why does untreated sewage cause serious problems to streams and lakes?
a) sewage will deplete the water of oxygen required by fish and other animals
b) sewage creates unpleasant odours for water animals
c) sewage decreases the temperature of the water
d) sewage will decrease the amount of nutrients in the water - ANSWER-a) sewage
will deplete the water of oxygen required by fish and other animals
pg. 4
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