Questions

Question 1

True False
Water storage facilities are used to store water when demands for water are high and to distribute water during periods of low demand.

Answer 1

False

Storage facilities are to provide water for average and Peak demands

Question 2

True False

Periodically clear wells must be inspected for leaks.

Answer 2

True

Question 3

True False

Standpipes constructed of Steel require less maintenance than those built of concrete.

Answer 3

False

Steel requires more maintenance.

Question 4

True False

Standpipes can provide large volumes of water at high pressures.

Answer 4

False

Low pressures

Question 5

True False

Hydropneumatic or pressure tank systems are a type of facility that is usually found in large water systems

Answer 5

False

Small water systems

Question 6

True False

Hydropneumatic tanks must contain the proper amount of air to be effective

Answer 6

True

Question 7

True False

What all pumps are operating at full capacity, there is a significant danger of backsiphonage into the water supply.

Answer 7

True

Question 8

True False
When pumps are operating at full capacity, put on line, or taken off line, these conditions can create electrical power surges that may cause pump motors to trip out (stop working) and produce serious problems.

Answer 8

True

Question 9

True False

In distribution storage facilities, water levels rise during Peak demands and drop during low demands.

Answer 9

False

water levels are lowered during Peak demands and rise furi g low demands

Question 10

True False

Centrifugal pumps can operate when the impeller is above the water surface.

Answer 10

False

Centrifugal pumps cannot operate unless the impeller is submerged in water

Question 11

True False

Be sure the gate to the water storage facility is locked to keep out vandals and unauthorized persons.

Answer 11

True

Question 12

True False

In very cold climates, storage facilities are taken out of service and painted in the winter.

Answer 12

False
(The best time of year to take a storage facility out of service for complete cleaning and inspection is during the period of lowest water consumption)

Question 13

True False

Always disinfect water storage facilities Whenever there has been any opportunity or contamination.

Answer 13

True

Question 14

True False

After a water storage tank has been disinfected remaining mixture of chlorine in water must be properly disposed of.

Answer 14

True

Question 15

True False
Regulator stations consists of a series of valves that reduce high pressures to lower, more acceptable working pressures.

Answer 15

True

Question 16

Best Answer
What is the main purpose of a water storage facility?
1. To allow neighborhoods in the community to have their own storage facility. 2. To maintain a constant pressure at all times on every consumer’s tap.
3. To provide a sufficient amount of water to average or equalize daily demands on the water supply system.
4. To store water after treatment until it is properly “aged”.

Answer 16

3. To provide a sufficient amount of water to average or equalize daily demands on the water supply system.

Question 17

Best Answer
What is the primary use of elevated tanks?

To attract commercial and Industrial Development.
To enhance the scenery of a community.
To maintain an adequate and fairly uniform pressure to the service Zone.
To prevent graffiti and vandalism to storage facilities.

Answer 17

To maintain an adequate and fairly uniform pressure to the service Zone.

Question 18

Best Answer
What is a limitation of elevated tanks?

Continuous pumping is required.
Eliminates availability of water for fires.
Increased auxiliary power requirements.
The pressure in the distribution system may vary with the water level in the tank.

Answer 18

The pressure in the distribution system may vary with the water level in the tank.

Question 19

Best Answer
What are standpipes?

Pipes that stand on the ground with the most of the pipe below the ground surface.
Pipes that stand on the ground without any support.
Tanks that stand on the ground and have a height greater than their diameter. Tanks that stand on the ground and have an outlet pipe near the top.

Answer 19

Tanks that stand on the ground and have a height greater than their diameter.

Question 20

Best Answer

Why should all reservoirs be covered?

To reduce the amount of evaporation.
To reduce the paint required to cover the reservoir.
To reduce the possibility of contamination.
To reduce the time required to inspect the reservoir.

Answer 20

To reduce the possibility of contamination

Question 21

Best Answer
Why must Reservoir vents be adequate and never blocked?

To reduce surface runoff to flow into the reservoir when it is available.
To avoid weakening the structural stability of the reservoir.
To meet maximum daily flow demands.
To prevent pressures from developing in the reservoir when it fills or a vacuum when it empties or is drained.

Answer 21

To prevent pressures from developing in the reservoir when it fills or a vacuum when it empties or is drained.

Question 22

Best Answer

What is hydro pneumatic or pressure tank system?
A system in which a water pump is controlled by the air pressure in a tank partially filled with water.
A system in which large amounts of water are stored in the hydro pneumatic tank.
A system in which only one home can be connected to the hydropneumatic tank
A system in which water is compressed in a pressure tank.

Answer 22

A system in which a water pump is controlled by the air pressure in a tank partially filled with water.

Question 23

Best Answer

Why must care be used when operating and maintaining hydropneumatic tanks, especially the pressure relief valve?

Because a vacuum can easily be developed in the system.
Because O&M is a complex process.
Because of the high pressure in the tank.
Because the potential to fall into the water and drown.

Answer 23

Because of the high pressure in the tank.

Question 24

Best Answer

What will happen if there is a lack of sufficient air in a hydropneumatic tank?

A rapid start- stop cycling of the pump may result in equipment damage. Excessive pressure may build up in the system.
The hydropneumatic tank may develop leaks.
The pump may lose its prime.

Answer 24

A rapid start- stop cycling of the pump may result in equipment damage.

Question 25

Best Answer What is backsiphonage? A condition created when a backflow prevention device functions properly. A condition created when water backs up or reverses direction in a water main. A form of backflow caused by a negative or below atmosphere pressure within a water system. A form of siphonage created when water is lifted over a hill by negative pressures.

Answer 25

A form of backflow caused by a negative or below atmosphere pressure within a water system.

Question 26

Best Answer What water quality problems could be caused by the use of food-grade oil in pumps? Approved food-grade oil for pumps may be expensive and difficult to obtain Pump motors operate at faster than design speeds and burn out Serves as food for a thriving microorganism population on the tank bottom. Switching to petroleum-grade oil may cause oily sludge on the tank bottom.

Answer 26

Serves as food for a thriving microorganism population on the tank bottom.

Question 27

Best Answer What is a Cross Connection? A connection between a drinking (potable) water system and an unapproved water supply A cross formed by the connection of two different types of pipe materials A device used to prevent contamination of a drinking potable water system A location where a drinking (potable) water system crosses over a wastewater system

Answer 27

A connection between a drinking (potable) water system and an unapproved water supply

Question 28

Best Answer What is disinfection? The adjustment of pH to kill microorganisms The covering of a surface to prevent corrosion The inactivation or destruction of disease-producing organisms The sterilitization of water

Answer 28

The inactivation or destruction of disease-producing organisms

Question 29

Best Answer Why should underground tanks never be emptied when the water table is high? Pump could operate at less than optimum efficiency Tank could float and crack Unaccounted for water losses may increase Water could leak into the tank

Answer 29

Tank could float and crack

Question 30

What is the purpose of a booster pump? To boost the elevation of underground tanks To Increase the flow to a water treatment plant To increase the pressure in the mains on the discharge side of the main pump To pump water during power outages

Answer 30

To increase the pressure in the mains on the discharge side of the main pump

Question 31

Multiple Choice What are the purposes of a water storage facility? To meet the needs for fire protection To meet the needs for reserve storage To provide water for average and peak demands To provide water for industrial requirements To store water for droughts

Answer 31

To meet the needs for fire protection To meet the needs for reserve storage To provide water for average and peak demands To provide water for industrial requirements

Question 32

Multiple Choice Why are standpipes preferred to elevated storage tanks? Easier to maintain More accessible for observation More accessible for sampling to determine the quality of the stored water More objectionable from an aesthetic viewpoint Safer to work around

Answer 32

Easier to maintain More accessible for observation More accessible for sampling to determine the quality of the stored water Safer to work around

Question 33

Multiple Choice When a vacuum is created in a distribution system, this may result in the introduction of contamination to the water mains. If this happens, what should operators do? Apply additional pressure to the distribution system Flush the system Issue boil-water orders to consumer's Recirculate the water for retreatment Sample for coliforms to be sure the water is safe to drink

Answer 33

Flush the system Issue boil-water orders to consumer's Sample for coliforms to be sure the water is safe to drink

Question 34

Multiple Choice Why should reservoir overflow and air vents be screened? So that birds cannot enter the reservoir So that debris cannot enter the reservoir So that rodents cannot enter the reservoir So that snakes cannot enter the reservoir So that surface runoff water cannot enter the reservoir

Answer 34

So that birds cannot enter the reservoir So that debris cannot enter the reservoir So that rodents cannot enter the reservoir So that snakes cannot enter the reservoir

Question 35

Multiple Choice What abnormal operating conditions may be encountered when operating water storage tanks? 1. Broken or out-of-service pumps, mains or tanks 2. Excessive water demands, such as fire demands 3. Stale water in tanks creating tastes and odors 4. System pressures are within desired targeted levels 5. Tank levels are drawn down to meet demands and increase when demands decrease

Answer 35

1. Broken or out-of-service pumps, mains or tanks 2. Excessive water demands, such as fire demands 3. Stale water in tanks creating tastes and odors

Question 36

Multiple Choice What problems may be encountered by operators when using electrodes to sense water levels in storage tanks? Electrode measurements very with water temperature. Electrodes may corrode or become contaminated, thus requiring replacement. Electrodes must be calibrated regularly. Sensitivity of electroids may vary. When the electrodes need replacement or repair, they may be difficult to reach.

Answer 36

Electrodes may corrode or become contaminated, thus requiring replacement. When the electrodes need replacement or repair, they may be difficult to reach.

Question 37

Multiple Choice How can a pump be primed so the impeller is submerged in water? A priming water tank. Air may be removed from the pump casing by the use of a vacuum pump. An axillary water supply. Installation of a foot valve in the inlet of the pump suction pipe. Use of a special primer pump to pump water into the pump casing

Answer 37

All of the above

Question 38

Which indicators can be used to help decide when a storage tank will need cleaning? ``` Excessive color, taste, and odors. High iron and manganese levels. Positive bacteriological samples. Staining of Plumbing fixtures. Turbidities over an accepted standard ```

Answer 38

Excessive color, taste, and odors. Positive bacteriological samples. Turbidities over an accepted standard

Question 39

Multiple Choice Operators must be able to troubleshoot what types of water quality problems and storage tanks and Distribution Systems? ``` Color. Positive coliform results Taste and odors Turbidity Unaccounted for water losses ```

Answer 39

Color. Positive coliform results Taste and odors Turbidity

Question 40

Multiple choice. What are possible causes of water quality turbidity problems in storage tanks and Distribution Systems? ``` Calcium carbonate Floc carry over High chlorine residual Microscopic organisms Silt or clay in suspension ```

Answer 40

Calcium carbonate Floc carry over Microscopic organisms Silt or clay in suspension

Question 41

Multiple choice Before anyone ever enters a tank for any reason, which safety procedures must be followed? All persons entering a tank must wear a safety harness. First test the atmosphere in the tank for oxygen. One person trained in tank rescue procedures, safety, and first aid must remain at the tank entrance observing the actions of a person in the tank. Provide adequate ventilation especially when painting. Test the atmosphere in the tank forecast bustable and toxic gases

Answer 41

All of the above

Question 42

Multiple choice If drying time for paint on a tanks interior walls is insufficient, what problems could develop? ``` Colored water leaching of potentially toxic materials streaks on the walls taste and odors unhappy maintenance manufacturer ```

Answer 42

leaching of potentially toxic materials taste and odors

Question 43

Multiple choice ``` Which chemical Inhibitors are used to reduce the rate of corrosion? Caustic soda. Phosphate. Polyphosphate. Soda ash sodium hexametaphosphate ```

Answer 43

Phosphate. Polyphosphate. sodium hexametaphosphate

Question 44

Multiple choice Which of the following chemicals are chlorine neutralization chemicals? ``` Soda Ash sodium bisulfite (NaHSO3) sodium sulfite (Na2SO3) sodium thiosulfate (Na2S2O3) sulfur dioxide (SO2) ```

Answer 44

sodium bisulfite sodium sulfite sodium thiosulfate sulfur dioxide

Question 45

Multiple choice When working around water storage facilities, which safety hazards should be a personal concern to you? Make sure adequate ventilation is available during inspection or maintenance of the facility. Make sure the area around the storage facility is clean and clear of debris. Test the atmosphere before entering a storage facility for inspection. Use a ladder safety belt when using ladders. Use care when climbing storage facility ladders or stairways.

Answer 45

All of the above