Water Distribution Grade 3 Questions with
Answers
1. A water storage tanks
overflow pipe should have a on the outlet
A. Gate valve
B. Plug
C. Flapper Valve
D. P-trap: C. Flapper valve
2. What must aerobic organisms have to live an multiply ?
A. The Presence of nitrate
B. The Presence of oxygen
C. The absence of hydrogen sulfide
D. The absence of methane: B. The Presence of oxygen
3. The most effective way to obtain an employee's cooperation with a plan is to let her
/ him know.
A. That will hold them personally responsible for the plan
B. That you will or will not be available in the implantation of the plan
C. The part he/she has played in originating and/or implementing the plan
,D. You will assume full responsibility: C. The part he/she has played in originating and/or implementing
the plan
4. Which is the correct type of valve for controlling the level of a treated water storage
reservoir below the level of the hydraulic grade
A. Altitude valve
B. Check Valve
C. Pressure relief valve
D. Reduced pressure backflow valve: A. Altitude valve
5. Which is the best way to increase the dosage of any liquid chemical ?
A. Increase the number of strokes/minutes of the gravimetric feeder
B. Increase the stroke length of the chemical pump
C. Decrease the flow and maintain the same chemical feed rate
D. Chemical Dosages don't need to be changed: A. Increase the number of strokes/minutes of the gravimetric
feeder
6. Which of the following Describes the best way to remove calcium deposits from a
hypochlorite feed pump
A. Replace all the parts that have calcium deposits
B. Use a strong alkaline solution to dissolve the calcium deposits
C. Use an acid solution to dissolve the calcium deposits
D. Backflush the pump with the chlorine free water: C. Use an acid solution to dissolve the calcium deposits
, 7. Which of the following is an important aspect in the security of scada con-trolled
system.
A. Server all ethernet connections to scada system
B. Designate a single person to have complete access to scada system
C. Limit access to managers and supervisors
D. Eliminate backdoor access left by installation contractors: D. Eliminate backdoor access left by
installation contractors
8. 50 gallons of chemical solution containing 3 pounds of chemical per gallon are added to
a solution containing 2 pounds of chemical per gallon. How many pounds of chemical of the
new solution ?
A. 2.1 pounds per gallon
B. 2.3 pounds per gallon
C. 2.5 pounds per gallon
D. 2.7 pounds per gallon:
9. A horizontal centrifugal pup is being installed, When the pump is initially started,
there is immediate severe vibration. This is most likely caused by.
A. Air in the suction line
B. Bearings that are too hot
C. Cavitation of the pump housing
D. Misalignment between the motor and pump: D. Misalignment between the motor and pump
Answers
1. A water storage tanks
overflow pipe should have a on the outlet
A. Gate valve
B. Plug
C. Flapper Valve
D. P-trap: C. Flapper valve
2. What must aerobic organisms have to live an multiply ?
A. The Presence of nitrate
B. The Presence of oxygen
C. The absence of hydrogen sulfide
D. The absence of methane: B. The Presence of oxygen
3. The most effective way to obtain an employee's cooperation with a plan is to let her
/ him know.
A. That will hold them personally responsible for the plan
B. That you will or will not be available in the implantation of the plan
C. The part he/she has played in originating and/or implementing the plan
,D. You will assume full responsibility: C. The part he/she has played in originating and/or implementing
the plan
4. Which is the correct type of valve for controlling the level of a treated water storage
reservoir below the level of the hydraulic grade
A. Altitude valve
B. Check Valve
C. Pressure relief valve
D. Reduced pressure backflow valve: A. Altitude valve
5. Which is the best way to increase the dosage of any liquid chemical ?
A. Increase the number of strokes/minutes of the gravimetric feeder
B. Increase the stroke length of the chemical pump
C. Decrease the flow and maintain the same chemical feed rate
D. Chemical Dosages don't need to be changed: A. Increase the number of strokes/minutes of the gravimetric
feeder
6. Which of the following Describes the best way to remove calcium deposits from a
hypochlorite feed pump
A. Replace all the parts that have calcium deposits
B. Use a strong alkaline solution to dissolve the calcium deposits
C. Use an acid solution to dissolve the calcium deposits
D. Backflush the pump with the chlorine free water: C. Use an acid solution to dissolve the calcium deposits
, 7. Which of the following is an important aspect in the security of scada con-trolled
system.
A. Server all ethernet connections to scada system
B. Designate a single person to have complete access to scada system
C. Limit access to managers and supervisors
D. Eliminate backdoor access left by installation contractors: D. Eliminate backdoor access left by
installation contractors
8. 50 gallons of chemical solution containing 3 pounds of chemical per gallon are added to
a solution containing 2 pounds of chemical per gallon. How many pounds of chemical of the
new solution ?
A. 2.1 pounds per gallon
B. 2.3 pounds per gallon
C. 2.5 pounds per gallon
D. 2.7 pounds per gallon:
9. A horizontal centrifugal pup is being installed, When the pump is initially started,
there is immediate severe vibration. This is most likely caused by.
A. Air in the suction line
B. Bearings that are too hot
C. Cavitation of the pump housing
D. Misalignment between the motor and pump: D. Misalignment between the motor and pump
