ILLINOIS CLASS D WATER FINAL EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS /BRAND NEW!! /ALREADY GRADED A+
For a water storage tank, cathodic protection is only effective for the: - (ANSWER)tank areas covered by
water
For a water storage system, the purpose of an altitude valve is to prevent: - (ANSWER)overflows
Before using a water storage tank that has been disinfected, water from the tank must not show the
presense of: - (ANSWER)coliforms
High trihalomethane (THMs) levels may cause: - (ANSWER)cancer
A finished water with a negative Langelier Index may be: - (ANSWER)corrosive
Water with pH scale less than 7 is considered: - (ANSWER)acidic
pH scale of 7 is considered - (ANSWER)neutral
pH scale of 8-14 is considered? - (ANSWER)basic
How many gallons of water are in 1 cubic ft? - (ANSWER)7.48 gallons
How many gallons of water are in 15 cubic ft? - (ANSWER)15 x 7.48 = 112.2 gallons
How many cubic ft of water is 20 gallons? - (ANSWER)20/7.48 = 2.67 cubic ft
, ILLINOIS CLASS D WATER FINAL EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS /BRAND NEW!! /ALREADY GRADED A+
1 gallon of water equals how many lbs? - (ANSWER)8.34 lbs
16 gallons of water is how many lbs? - (ANSWER)16 x 8.34 = 133.44 lbs
A 180 ft water tower would show what psi on the gauge located at the base? - (ANSWER)180/ 2.31 =
77.92 psi
Pump cavitation is most likely to occur when: - (ANSWER)the top of the water source level is lower than
the impeller
1 pound per square inch is equal to how many feet of elevated water? - (ANSWER)2.31 feet
For most centrifugal pumps, if the total dyanmic head decreases, the pump will: - (ANSWER)pump water
at a faster rate in gpm. (less head to push against)
The velocity of water is measure in: - (ANSWER)Feet per Second
Distance (feet)/Time (sec)
When water lines in a distribution system are installed parallel to sewer lines, they should be located
how far apart from the sewer lines? - (ANSWER)10 ft
WITH DETAILED VERIFIED ANSWERS /BRAND NEW!! /ALREADY GRADED A+
For a water storage tank, cathodic protection is only effective for the: - (ANSWER)tank areas covered by
water
For a water storage system, the purpose of an altitude valve is to prevent: - (ANSWER)overflows
Before using a water storage tank that has been disinfected, water from the tank must not show the
presense of: - (ANSWER)coliforms
High trihalomethane (THMs) levels may cause: - (ANSWER)cancer
A finished water with a negative Langelier Index may be: - (ANSWER)corrosive
Water with pH scale less than 7 is considered: - (ANSWER)acidic
pH scale of 7 is considered - (ANSWER)neutral
pH scale of 8-14 is considered? - (ANSWER)basic
How many gallons of water are in 1 cubic ft? - (ANSWER)7.48 gallons
How many gallons of water are in 15 cubic ft? - (ANSWER)15 x 7.48 = 112.2 gallons
How many cubic ft of water is 20 gallons? - (ANSWER)20/7.48 = 2.67 cubic ft
, ILLINOIS CLASS D WATER FINAL EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS /BRAND NEW!! /ALREADY GRADED A+
1 gallon of water equals how many lbs? - (ANSWER)8.34 lbs
16 gallons of water is how many lbs? - (ANSWER)16 x 8.34 = 133.44 lbs
A 180 ft water tower would show what psi on the gauge located at the base? - (ANSWER)180/ 2.31 =
77.92 psi
Pump cavitation is most likely to occur when: - (ANSWER)the top of the water source level is lower than
the impeller
1 pound per square inch is equal to how many feet of elevated water? - (ANSWER)2.31 feet
For most centrifugal pumps, if the total dyanmic head decreases, the pump will: - (ANSWER)pump water
at a faster rate in gpm. (less head to push against)
The velocity of water is measure in: - (ANSWER)Feet per Second
Distance (feet)/Time (sec)
When water lines in a distribution system are installed parallel to sewer lines, they should be located
how far apart from the sewer lines? - (ANSWER)10 ft
