ILLINOIS CLASS D WATER LICENSE TEST| NEWEST ACTUAL EXAM CURRENTLY TESTING
COMPLETE EXAM QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) ALREADY GRADED A+
What is the minimum combined chlorine residual that is required to be an all parts of a
distribution system 1.0 mg/l
What is free chlorine? The portion (in mg/l) of chlorine that remains in finish water after the
demand for chlorine has been met
What is total chlorine? A amount of chlorine remaining after a given contact time
What is the minimum free chlorine residual that required to be an all parts of the distribution
system .5 mg/l
Of these three disinfectants which is the strongest? Calcium hypochlorite, sodium hypochlorite,
or chlorine gas? Chlorine gas
What is the percentage of available chlorine and chlorine gas 100%
What is the percentage of available chlorine in calcium hypochlorite 65 to 70 %
What is the percentage of available chlorine and sodium hypochlorite 10 to 15%
, If an operator has total chlorine residual of 1.6 mg/L and the sample has a free chlorine residual
of. 9 mg/l what was the chlorine demand in the sample water? .7 mg/l
If calcium hypochlorite and oily rags are allowed to come into contact with each other what will
occur? Ignition and flash fire will occur
When collecting a bacti. Sample The water should be collected after the Fossett has run for at
least? A period long enough to adequately flush out the service line to the main
Poly-pigging of a water main forms what purpose? Disinfected the water main, seals the inside
of the main with a smooth coding, both, or neither? Neither
If a small public water supply pumps 3,000,000 gallons of water in a 30 day period. It's expenses
total $8770. How much does it cost this public water supply to produce 1000 gallons of water?
And is this, compared to the national average, considered high? $2.92 per thousand gallons.
And yes it is a high cost
An elevator water tank sits on a bluff overlooking a river valley. The water level in this tank is
144 feet above the base of the tower. A part of the distribution system serves homes along the
banks of the river. These homes are 102 feet lower than the base of the water tower. What is
the average system pressure in psi at these homes 106.5 psi
COMPLETE EXAM QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) ALREADY GRADED A+
What is the minimum combined chlorine residual that is required to be an all parts of a
distribution system 1.0 mg/l
What is free chlorine? The portion (in mg/l) of chlorine that remains in finish water after the
demand for chlorine has been met
What is total chlorine? A amount of chlorine remaining after a given contact time
What is the minimum free chlorine residual that required to be an all parts of the distribution
system .5 mg/l
Of these three disinfectants which is the strongest? Calcium hypochlorite, sodium hypochlorite,
or chlorine gas? Chlorine gas
What is the percentage of available chlorine and chlorine gas 100%
What is the percentage of available chlorine in calcium hypochlorite 65 to 70 %
What is the percentage of available chlorine and sodium hypochlorite 10 to 15%
, If an operator has total chlorine residual of 1.6 mg/L and the sample has a free chlorine residual
of. 9 mg/l what was the chlorine demand in the sample water? .7 mg/l
If calcium hypochlorite and oily rags are allowed to come into contact with each other what will
occur? Ignition and flash fire will occur
When collecting a bacti. Sample The water should be collected after the Fossett has run for at
least? A period long enough to adequately flush out the service line to the main
Poly-pigging of a water main forms what purpose? Disinfected the water main, seals the inside
of the main with a smooth coding, both, or neither? Neither
If a small public water supply pumps 3,000,000 gallons of water in a 30 day period. It's expenses
total $8770. How much does it cost this public water supply to produce 1000 gallons of water?
And is this, compared to the national average, considered high? $2.92 per thousand gallons.
And yes it is a high cost
An elevator water tank sits on a bluff overlooking a river valley. The water level in this tank is
144 feet above the base of the tower. A part of the distribution system serves homes along the
banks of the river. These homes are 102 feet lower than the base of the water tower. What is
the average system pressure in psi at these homes 106.5 psi
