OPERATOR IN TRAINING EXAM 2024-2025
questions and answers graded A+
What are two of the most important safety concerns when entering a confined space? answer--Lack of
oxygen
-Hazardous gases
What is the impact of lead in drinking water? answer-It is harmful to human health
The most important reason for operators to maintain the quality of drinking water is to: answer-
Safeguard public health
A reservoir has a width of 6m and a length of 18m. What is the area of the floor? answer-104 m^2
What is indicated if the chlorine demand suddenly jumps from 0.9 mg/l to 3.0 mg/l in a well supply
answer-Possible contamination
What must aerobic organisms have to live and multiply answer-Oxygen
Check valves are used to answer-Permit flow in one direction only
When working with chemicals safe handling and first aid information can be found in what document?
answer-Safety Data Sheet
The inlet of a pump is called the? answer-Suction
Which of the following maintenance practices provides the best indication of the condition of a sewer
pipe? answer-Closed circuit camera inspection
, Cross connection between potable water supplies and sources of contamination such as wastewater
must be prevented by: answer-An approved back flow prevention device
What is static head? answer-The pressure due to the elevation of the water
The most commonly used test to measure the organic strength of wastewater is: answer-The
Biochemical Oxygen Demand (BOD)
During a 24 hour period, the minimum wastewater flow usually occurs closest to: answer-04:00 Hrs
The wastewater level in a tank is dropping at a rate of 0.3 m/hr from an influent tank that is 9.6 m long,
7.6 m wise, and 4.6 m high. How many litres of wastewater flow out of the tank in one hour answer-
21,888 L
What is the most commonly used chemical for disinfection of water answer-Sodium hypochlorite
The chlorine dosage of a towns water source is 8 mg/l. The chlorine demand for the water is 4.3 mg/l.
What is the chlorine residual? answer-3.7 mg/L (8.0-4.3=3.7)
The discharge of an organic pollutant into a river will cause the depletion of answer-Dissolved oxygen
Chlorine gas is answer-Heavier than air
Pressure is usually measure in answer-PSI
Which provincial/ territorial ministry covers drinking water related regulations answer-Health
Water mains should be flushed answer-Often enough to maintain water quality
questions and answers graded A+
What are two of the most important safety concerns when entering a confined space? answer--Lack of
oxygen
-Hazardous gases
What is the impact of lead in drinking water? answer-It is harmful to human health
The most important reason for operators to maintain the quality of drinking water is to: answer-
Safeguard public health
A reservoir has a width of 6m and a length of 18m. What is the area of the floor? answer-104 m^2
What is indicated if the chlorine demand suddenly jumps from 0.9 mg/l to 3.0 mg/l in a well supply
answer-Possible contamination
What must aerobic organisms have to live and multiply answer-Oxygen
Check valves are used to answer-Permit flow in one direction only
When working with chemicals safe handling and first aid information can be found in what document?
answer-Safety Data Sheet
The inlet of a pump is called the? answer-Suction
Which of the following maintenance practices provides the best indication of the condition of a sewer
pipe? answer-Closed circuit camera inspection
, Cross connection between potable water supplies and sources of contamination such as wastewater
must be prevented by: answer-An approved back flow prevention device
What is static head? answer-The pressure due to the elevation of the water
The most commonly used test to measure the organic strength of wastewater is: answer-The
Biochemical Oxygen Demand (BOD)
During a 24 hour period, the minimum wastewater flow usually occurs closest to: answer-04:00 Hrs
The wastewater level in a tank is dropping at a rate of 0.3 m/hr from an influent tank that is 9.6 m long,
7.6 m wise, and 4.6 m high. How many litres of wastewater flow out of the tank in one hour answer-
21,888 L
What is the most commonly used chemical for disinfection of water answer-Sodium hypochlorite
The chlorine dosage of a towns water source is 8 mg/l. The chlorine demand for the water is 4.3 mg/l.
What is the chlorine residual? answer-3.7 mg/L (8.0-4.3=3.7)
The discharge of an organic pollutant into a river will cause the depletion of answer-Dissolved oxygen
Chlorine gas is answer-Heavier than air
Pressure is usually measure in answer-PSI
Which provincial/ territorial ministry covers drinking water related regulations answer-Health
Water mains should be flushed answer-Often enough to maintain water quality
