OPERATOR IN TRAINING EXAM 2025/2026 Ques ons
and answers Newest RATED A+ 2025/2026 NEW!!
What are two of the most important safety concerns when entering a confined space? - Ans -
Lack of oxygen
-Hazardous gases
What is the impact of lead in drinking water? - Ans It is harmful to human health
The most important reason for operators to maintain the quality of drinking water is to: - Ans
Safeguard public health
A reservoir has a width of 6m and a length of 18m. What is the area of the floor? - Ans 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 - Ans Possible contamina4on
What must aerobic organisms have to live and mul4ply - Ans Oxygen
Check valves are used to - Ans Permit flow in one direc4on only
When working with chemicals safe handling and first aid informa4on can be found in what
document? - Ans Safety Data Sheet
The inlet of a pump is called the? - Ans Suc4on
, Which of the following maintenance prac4ces provides the best indica4on of the condi4on of a
sewer pipe? - Ans Closed circuit camera inspec4on
Cross connec4on between potable water supplies and sources of contamina4on such as
wastewater must be prevented by: - Ans An approved back flow preven4on device
What is sta4c head? - Ans The pressure due to the eleva4on of the water
The most commonly used test to measure the organic strength of wastewater is: - Ans The
Biochemical Oxygen Demand (BOD)
During a 24 hour period, the minimum wastewater flow usually occurs closest to: - Ans 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 - Ans 21,888 L
What is the most commonly used chemical for disinfec4on of water - Ans 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? - Ans 3.7 mg/L (8.0-4.3=3.7)
The discharge of an organic pollutant into a river will cause the deple4on of - Ans Dissolved
oxygen
Chlorine gas is - Ans Heavier than air
, Pressure is usually measure in - Ans PSI
Which provincial/ territorial ministry covers drinking water related regula4ons - Ans Health
Water mains should be flushed - Ans O>en enough to maintain water quality
What type of plan is a water purveyor required to have under provincial/ territorial
regula4ons? - Ans An emergency response plan
Operators should not use water to ex4nguish fores involving electrical equipment as water: -
Ans May transmit electrical shock to the operator
An Operator drove 66.9 km on Monday, 18 km on Tuesday, 77.7 km on Wednesday, 0 km on
Thursday, and 39.9 km on Friday. What is the average number of kilometres driven per day
during the five-day work week? - Ans 40.5 km
Reciproca4ng posi4ve-displacement pumps are also known as - Ans Piston pumps
Why are fire hydrant caps commonly colour coded? - Ans to indicate the hydrant flow capacity
What is the net weight of a 3500 Litre tank of water? - Ans 3500kg
The component of a centrifugal pump some4mes installed on the end of a suc4on pipe to hold
the priming is known as a - Ans foot valve
Check valves are used to prevent - Ans flow in two direc4ons
and answers Newest RATED A+ 2025/2026 NEW!!
What are two of the most important safety concerns when entering a confined space? - Ans -
Lack of oxygen
-Hazardous gases
What is the impact of lead in drinking water? - Ans It is harmful to human health
The most important reason for operators to maintain the quality of drinking water is to: - Ans
Safeguard public health
A reservoir has a width of 6m and a length of 18m. What is the area of the floor? - Ans 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 - Ans Possible contamina4on
What must aerobic organisms have to live and mul4ply - Ans Oxygen
Check valves are used to - Ans Permit flow in one direc4on only
When working with chemicals safe handling and first aid informa4on can be found in what
document? - Ans Safety Data Sheet
The inlet of a pump is called the? - Ans Suc4on
, Which of the following maintenance prac4ces provides the best indica4on of the condi4on of a
sewer pipe? - Ans Closed circuit camera inspec4on
Cross connec4on between potable water supplies and sources of contamina4on such as
wastewater must be prevented by: - Ans An approved back flow preven4on device
What is sta4c head? - Ans The pressure due to the eleva4on of the water
The most commonly used test to measure the organic strength of wastewater is: - Ans The
Biochemical Oxygen Demand (BOD)
During a 24 hour period, the minimum wastewater flow usually occurs closest to: - Ans 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 - Ans 21,888 L
What is the most commonly used chemical for disinfec4on of water - Ans 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? - Ans 3.7 mg/L (8.0-4.3=3.7)
The discharge of an organic pollutant into a river will cause the deple4on of - Ans Dissolved
oxygen
Chlorine gas is - Ans Heavier than air
, Pressure is usually measure in - Ans PSI
Which provincial/ territorial ministry covers drinking water related regula4ons - Ans Health
Water mains should be flushed - Ans O>en enough to maintain water quality
What type of plan is a water purveyor required to have under provincial/ territorial
regula4ons? - Ans An emergency response plan
Operators should not use water to ex4nguish fores involving electrical equipment as water: -
Ans May transmit electrical shock to the operator
An Operator drove 66.9 km on Monday, 18 km on Tuesday, 77.7 km on Wednesday, 0 km on
Thursday, and 39.9 km on Friday. What is the average number of kilometres driven per day
during the five-day work week? - Ans 40.5 km
Reciproca4ng posi4ve-displacement pumps are also known as - Ans Piston pumps
Why are fire hydrant caps commonly colour coded? - Ans to indicate the hydrant flow capacity
What is the net weight of a 3500 Litre tank of water? - Ans 3500kg
The component of a centrifugal pump some4mes installed on the end of a suc4on pipe to hold
the priming is known as a - Ans foot valve
Check valves are used to prevent - Ans flow in two direc4ons
