Water Distribution “C” Course Exam Questions With
Complete Solutions
After a job completion, how many cubic yards of dirt will be
hauled away from an excavation site with a trench that is 250
feet long, 42 inches wide 5 feet deep and has a 24 inch pipe
installed inside it?
a. 785 yards^3
b. 162 yards^3
c. 13 yards^3
d. 29 yards^3 Correct Answers d. 29 yards^3
Cathodic protection is _____.
a. a method of purifying water by radiation
b. a way of getting rid of rust inside the tanks
c. an electrochemical means of preventing corrosion on tank
surfaces below the water line
d. using cathodes to disinfect the water supply in reservoirs
Correct Answers c. an electrochemical means of preventing
corrosion on tank surfaces below the water line
Check valves on the discharge side of a pump _____.
a. check on how much water is flowing through the pipe
b. check on the water velocity
c. stop the flow of water in case of flooding
d. keep water from flowing back through the pump when it is
shut off Correct Answers d. keep water from flowing back
through the pump when it is shut off
Considering friction, how many 6 inch water lines would be
required to carry the same amount of water as one 12 inch line?
, a.2
b. 4
c. 6
d. 8 Correct Answers
Dead end mains should be flushed every _____.
a. day
b. week
c. month
d. 4th of July Correct Answers c. month
Heavy water use in summer can result in complaints about
_____.
a. stained laundry
b. low water pressure
c. damaged water heaters
d. vandalism Correct Answers b. low water pressure
How far do fire hydrants have to be, both vertically and
horiontally, from any sanitary wastewater line?
a. 3 ft
b. 7 ft
c. 8 ft
d. 9 ft Correct Answers d. 9 ft
How many gallons of water will a tank hold that is 30 feet long,
and 20 feet wide, and 12 feet deep?
a. 7200
b. 53856
c. 60048
d. 71440 Correct Answers b. 53856
Complete Solutions
After a job completion, how many cubic yards of dirt will be
hauled away from an excavation site with a trench that is 250
feet long, 42 inches wide 5 feet deep and has a 24 inch pipe
installed inside it?
a. 785 yards^3
b. 162 yards^3
c. 13 yards^3
d. 29 yards^3 Correct Answers d. 29 yards^3
Cathodic protection is _____.
a. a method of purifying water by radiation
b. a way of getting rid of rust inside the tanks
c. an electrochemical means of preventing corrosion on tank
surfaces below the water line
d. using cathodes to disinfect the water supply in reservoirs
Correct Answers c. an electrochemical means of preventing
corrosion on tank surfaces below the water line
Check valves on the discharge side of a pump _____.
a. check on how much water is flowing through the pipe
b. check on the water velocity
c. stop the flow of water in case of flooding
d. keep water from flowing back through the pump when it is
shut off Correct Answers d. keep water from flowing back
through the pump when it is shut off
Considering friction, how many 6 inch water lines would be
required to carry the same amount of water as one 12 inch line?
, a.2
b. 4
c. 6
d. 8 Correct Answers
Dead end mains should be flushed every _____.
a. day
b. week
c. month
d. 4th of July Correct Answers c. month
Heavy water use in summer can result in complaints about
_____.
a. stained laundry
b. low water pressure
c. damaged water heaters
d. vandalism Correct Answers b. low water pressure
How far do fire hydrants have to be, both vertically and
horiontally, from any sanitary wastewater line?
a. 3 ft
b. 7 ft
c. 8 ft
d. 9 ft Correct Answers d. 9 ft
How many gallons of water will a tank hold that is 30 feet long,
and 20 feet wide, and 12 feet deep?
a. 7200
b. 53856
c. 60048
d. 71440 Correct Answers b. 53856
