pumps/pumping/wells - sample questions

New England Water Works Association

1. Why is a well acidified?

—A. Take out soluble iron or manganese

—B. Increase the well’s productivity

—C. Remove objectionable gases

—D. Remove turbidity

New England Water Works Association

1. Why is a well acidified?

— A. Take out soluble iron or manganese

— B. Increase the well’s productivity

— C. Remove objectionable gases

— D. Remove turbidity

New England Water Works Association

2. Which of the following best defines static water level ?

— A. Water level in a well after a pump has operated for a period of time.

— B. Water level in a well when the well in not in operation.

— C. Water level in a well measured from the ground surface to the drawdown water level.

— D. Water level in a well measured from the natural water level to the drawdown water level.

New England Water Works Association

2. Which of the following best defines static water level ?

— A. Water level in a well after a pump has operated for a period of time.

— B. Water level in a well when the well in not in operation.

— C. Water level in a well measured from the ground surface to the drawdown water level.

— D. Water level in a well measured from the natural water level to the drawdown water level.

New England Water Works Association

3. Which of the following best describes the cone of depression?

— A. Change in water elevation from the normal level to the pumping level

— B. Depression around the well of the water surface caused by pumping water from the well

— C. Water level in a well after a pomp has operated over a period of time

— D. Measured distance from the ground to the pumping level

New England Water Works Association

3. Which of the following best describes the cone of depression?

— A. Change in water elevation from the normal level to the pumping level

— B. Depression around the well of the water surface caused by pumping water from the well

— C. Water level in a well after a pomp has operated over a period of time

— D. Measured distance from the ground to the pumping level

New England Water Works Association

4. The residual drawdown of a well is defined as

— A. water level in a well after a pump has operated over a period of time

— B. measured distance from the ground to the pumping level

— C. water level below the normal level that persists after a well pump has been off for a period of time

— D. measured distance between the water level and the top of the screen

New England Water Works Association

4. The residual drawdown of a well is defined as

— A. water level in a well after a pump has operated over a period of time

— B. measured distance from the ground to the pumping level

— C. water level below the normal level that persists after a well pump has been off for a period of time

— D. measured distance between the water level and the top of the screen

New England Water Works Association

Well Pumping

Cone of DepressionDrawdown

Pumping Water Level

Radius of influence

New England Water Works Association

5. What is the maximum theoretical suction lift of a

centrifugal pump at sea level?

— A. 10 ft.

— B. 34 ft.

— C. 52 ft.

— D. 85 ft.

New England Water Works Association

5. What is the maximum theoretical suction lift of a

centrifugal pump at sea level?

— A. 10 ft.

— B. 34 ft.

— C. 52 ft.

— D. 85 ft.

New England Water Works Association

6. What type of motor in the simplest of all AC motors, with rotors consisting of a

series of bars placed in slots?

— A. Squirrel-cage

— B. Wound-rotor

— C. Capacitor-start

— D. Synchronous

New England Water Works Association

6. What type of motor in the simplest of all AC motors, with rotors consisting of a

series of bars placed in slots?

— A. Squirrel-cage

— B. Wound-rotor

— C. Capacitor-start

— D. Synchronous

New England Water Works Association

7. Which of the following type of valve is used in maintaining prime to a

pump?

— A. Foot

— B. Suction

— C. Vacuum header

— D. Butterfly

New England Water Works Association

7. Which of the following type of valve is used in maintaining prime to a

pump?

— A. Foot

— B. Suction

— C. Vacuum header

— D. Butterfly

New England Water Works Association

8. Which of the following characteristics of a pump is shown in

a pump curve?

— A. wire-to-water horsepower

— B. motor horsepower

— C. friction loss

— D. efficiency

New England Water Works Association

8. Which of the following characteristics of a pump is

shown in a pump curve?— A. wire-to-water horsepower

— B. motor horsepower

— C. friction loss

— D. efficiency

New England Water Works Association

9. Which type of level sensor requires an air supply?

— A. Bubbler tube

— B. Diaphragm element

— C. Float mechanism

— D. Direct electronic sensor

New England Water Works Association

9. Which type of level sensor requires an air supply?

— A. Bubbler tube

— B. Diaphragm element

— C. Float mechanism

— D. Direct electronic sensor

New England Water Works Association

10. A well produces 365 gpm with a drawdown of 22.5 ft. What is the specific

yield in gallons per minute for foot?

— A. 16.2

— B. 22.5

— C. 32.4

— D. 36.5

New England Water Works Association

10. A well produces 365 gpm with a drawdown of 22.5 ft. What is the specific

yield in gallons per minute for foot?

— A. 16.2

— B. 22.5

— C. 32.4

— D. 36.5

Sp. Yield = gpm/ft

Sp. Yield = 365/22.5

Sp. Yield = 16.222 gpm/ft

New England Water Works Association

11. What type of motor is used when infrequent starting is required and load needs to be brought up to speed very

quickly?

— A. repulsion-induction

— B. capacitor-start

— C. wound-rotor

— D. synchronous

New England Water Works Association

11. What type of motor is used when infrequent starting is required and load needs to be brought up to speed very

quickly?

— A. repulsion-induction

— B. capacitor-start

— C. wound-rotor

— D. synchronous

New England Water Works Association

12. What type of level sensor has air connected to a pressure transducer via

a tube?

— A. bubbler tube

— B. direct electronic sensor

— C. float mechanism

— D. diaphragm element

New England Water Works Association

12. What type of level sensor has air connected to a pressure transducer via

a tube?

— A. bubbler tube

— B. direct electronic sensor

— C. float mechanism

— D. diaphragm element

New England Water Works Association

13. Which of the following pumps should be used to increase pressure at large

distribution systems?

— A. positive displacement

— B. progressive cavity

— C. vertical turbine

— D. airlift

New England Water Works Association

13. Which of the following pumps should be used to increase pressure at large

distribution systems?

— A. positive displacement

— B. progressive cavity

— C. vertical turbine

— D. airlift

New England Water Works Association

14. What is the term for the height of a column of water will rise in a well?

— A. potentiometric

— B. groundwater level

— C. piezometric surface

— D. Residual drawdown

New England Water Works Association

14. What is the term for the height of a column of water will rise in a well?

— A. potentiometric

— B. groundwater level

— C. piezometric surface

— D. Residual drawdown