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Drinking Water Distribution > Operation and Maintenance > Flashcards

Operation and Maintenance Flashcards

1
Q

True or false? All complaints should be treated as legitimate and investigated as soon as possible.

A

True

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2
Q

True or false? Avoiding unnecessary water consumption, recycling trimmings, and limiting chemical use are common practices in environmentally friendly landscaping.

A

True

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3
Q

True or false? Exercising ( opening and closing) a valve should be done at the same time the valve inspection is made.

A

True

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4
Q

True or false? A geographic information system (GIS) can generate work orders in the form of a map with the work to be performed outline on the map.

A

True

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5
Q

True or false? A pipe’s useful life can be extended if it is properly maintained and rehabilitated.

A

True

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6
Q

True or false? Higher water pressures in pipes increase the over-registration of meters.

A

False

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7
Q

True or false? The water supplier’s management and operators have the legal responsibility for delivering safe water to their customers.

A

True

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8
Q

True or false? A lack of chlorine residual in a distribution system could indicate the potential presence of heavy contamination.

A

True

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9
Q

True or false? When performing electrical thawing of frozen water services, clean the service pipe at where the thawing power is to be connected because a poor electrical connection may cause arcing, which could cut holes through the pipe.

A

True

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10
Q

True or false? Routine flushing of dead-end lines is often necessary to avoid taste and odor complaints.

A

True

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11
Q

What is a vulnerability assessment of a water distribution system ?

a. A determination of which parts of a system need repair/ replacement
b. A determination of the funding needed to recover from a disaster
c. A determination of where the weaknesses are is the disaster being considered occurred
d. A determination of which staff can respond to the disaster

A

A determination of where the weaknesses are if the disaster being considered occurred.

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12
Q

What is the most important safety precaution that must be taken before repairing or adjusting any equipment ?

a. Lock out, block out , and tag the equipment
b. Use the buddy system
c. Contact the safety officer
d. Notify supervisor

A

Lock out, block out, and tag the equipment

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13
Q

Where should samples be drawn from for the best and truest evaluation of water quality ?

a. Directly from the consumers tap
b. Directly from the source of the water supply
c. Directly from the main at specially designed sampling stations
d. Directly from the treatment plants clear well

A

Directly from the main at specially designed sampling stations

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14
Q

Why should hypochlorite solution be stored in a cool, dark location and used as soon as possible?

a. To prevent formation of THMs
b. To prevent escape of chlorine odors
c. To prevent deterioration of the solution
d. To prevent bleaching of the chlorine color

A

To prevent deterioration of the solution

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15
Q

What is the best way to prevent back flow?

a. To implement a cross connection control program
b. To permanently eliminate the hazard that causes it
c. To educate the water utility customers
d. To inspect utility and customer piping

A

To permanently eliminate the hazard that causes it

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16
Q

What is hot tapping in relation to pipe or service connections?

a. Making a connection by spraying water on the tap
b. Making a connection when the main is under water in a the trench
c. Making a connection with the main under water pressure
d. Making a connection during water weather

A

Making a connection with the main under water pressure

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17
Q

Why should vacuum relief or air release valves and blow offs be inspected after rains or floods ?

a. To ensure they are not allowing infiltration into the system
b. To ensure they are not submerged in drainage waters
c. To ensure they are not allowing unaccounted for leaks in the system
d. To ensure they are not being shifted to another location

A

to ensure they are not submerged in drainage waters

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18
Q

When flushing pipes, which procedure is referred to as unidirectional flushing?

a. planning the flushing operation to avoid back pressure and backsiphonage
b. Ensuring the flushing crews are always working on the same direction
c. Always flushing uphill
d. Starting at or near the source of supply and working outward until the distribution system

A

Start at or near the source of supply and working outward into the distribution system.

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19
Q

How can you protect yourself from electric shock when working on a water meter in the field?

a. Lock out and tag out the circuit breaker
b. Wear rubber gloves
c. Stand on rubber mat
d. Install an electrical jumper around the meter

A

Install an electrical jumper around the meter

20
Q

What is the function of a geographic information system (GIS)?

a. Assisted planners in following zoning patterns
b. Combines mapping with detailed information about the physical structures within geographic areas
c. Records and analyzes trends in system flows
d. Stores and sorts maintenance information

A

Combines mapping with detailed information about the physical structures within geographic areas.

21
Q

How can a leak detection program be economically justified?

a. If the benefits from satisfied consumers is greater than costs
b. If the ratepayers are willing to pay for Increased costs
c. If a leak detection crew can reduce the flow of leaks and produce cost savings greater than the cost of maintaining the field crew
d. If the cost of pipe replacement is less than O&M cost

A

If a leak detection crew can reduce the flow of leaks and produce cost savings greater than the cost of maintaining the field crew

22
Q

What repair job is often performed on fire hydrants?

a. Replacing main valves
b. Painting
c. Fixing leaks
d. Flushing

A

replacing main valves

23
Q

What is the main function of a distribution system storage reservoir?

a. To take care of daily water demands as well as peak demands
b. To allow sediment to settle out of the water
c. To enhance the aesthetic appearance of the neighborhood
d. To provide chlorine contact time for disinfection

A

to take care of daily water demands as well as peak demands.

24
Q

Why can electrical thawing of frozen pipes be dangerous?

a. Potential damage to underground utilities
b. Potential damage to snow removal equipment
c. Potential damage to water quality
d. Potential damage to household electrical wiring

A

Potential damage to household electrical wiring.

25
Q

How do you locate underground utilities in connection with excavations?

a. Locate underground utilities on the contractor as built drawings
b. Locate underground utilities after excavation has uncovered them
c. Locate underground utilities on the utility capital improvement plan drawings
d. Locate underground utilities by calling underground utility location services before starting any excavation

A

Locate underground utilities by calling underground utility location services before starting any excavation

26
Q

Which tasks are performed when maintaining or repairing a water meter ?

  1. Thoroughly clean all parts
  2. Inspect parts for excessive wear and corrosion, pitting, or distortion
  3. Replace all defective and badly worn parts
  4. Collect samples of water flowing through the meter
  5. Retest the meter for accuracy
A
  1. Thoroughly clean all parts
  2. Inspect parts for excessive wear and corrosion, pitting, or distortion
  3. Replace all defective and badly worn parts
  4. Retest the meter for accuracy
27
Q

Which factors must an operator consider when deciding the most suitable method of chlorination to disinfect water storage facilities?

  1. Expected water demands
  2. Training status of the operators who will do the disinfection
  3. Availability of materials and equipment
  4. Season of the year
  5. Safety
A
  1. training status of the operators who will do the disinfection
  2. availability of materials and equipment
  3. safety
28
Q

What items should operators check during daily surveillance of water storage facilities?

  1. Intact locks on reservoirs
  2. Vandalism
  3. Fence and screen openings
  4. Trespassing
  5. Dumping of trash
A
  1. intact locks on reservoirs
  2. vandalism
  3. fence and screen openings
  4. Trespassing
  5. dumping of trash
29
Q

Which tasks should be performed during routine valve inspections?

  1. Verify the accuracy of valve box locations on system map
  2. Clean the valve box cover seat
  3. Reopen the valve to reestablish system flows
  4. After removing the valve box cover, inspect the stem and nut for damage or obvious leakage
  5. Close the valve fully, if possible, and record the number of turns to the fully closed position
A
  1. Verify the accuracy of valve box locations on the system map
  2. Clean the valve box cover seat
  3. Reopen the valve to reestablish system flows
  4. After removing the valve box cover, inspect the stem and nut for damage or obvious leakage
  5. Close the valve fully, if possible, and record the number of turns to the fully closed position
30
Q

Which rules under federal and state regulations require water quality monitoring in water distribution systems?

  1. Total Coliform Rule
  2. Lead and Copper Rule
  3. Enhanced Surface Water Treatment Rule
  4. Trihalomethane Rule
  5. Arsenic Rule
A
  1. Total Coliform Rule
  2. Lead and Copper Rule
  3. Trihalomethane Rule
31
Q

Which sources of contamination might be contained in unprotected cross connections between public water systems and other pipes systems on consumers premises?

  1. Wastewater
  2. Untreated supplies from private wells
  3. Processed waters
  4. Public water supplies
  5. Stormwater
A
  1. wastewater
  2. untreated supplies from private wells
  3. processed waters
  4. stormwater
32
Q

Which tasks are part of general inspection and maintenance procedures for fire hydrants ?

  1. Remove all nozzle caps and inspect for thread damage from impact or cords threading
  2. Open the hydrant fully, checking for ease of operation
  3. Prepare a record of the inspection and maintenance operations and any repair work
  4. Inspect for leakage and make corrections when necessary
  5. Check for any exterior obstructions that could interfere with hydrant operation during an emergency
A
  1. Remove all nozzle caps and inspect for thread damage from impact or cross-threading
  2. Open the hydrant fully, checking for ease of operation
  3. Prepare a record of the inspection and maintenance operations and any repair work
  4. Inspect for leakage and make corrections when necessary
  5. Check for any exterior obstructions that could interfere with hydrant operation during an emergency
33
Q

What are the primary responsibilities of a water utility during a disaster?

  1. Continue to bill water users to maintain a flow of revenue
  2. Maintain the public relations program to keep consumers calm
  3. Provide water for firefighting, drinking , and sanitation
  4. Restore the integrity of the entire water system as soon as possible
  5. Prevent the unnecessary loss of stored water
A
  1. Provide water for firefighting, drinking, and sanitation
  2. Restore the integrity of the entire water systems as soon as possible
  3. Prevent the unnecessary loss of stored water
34
Q

What tasks are part of pump inspection and preventive maintenance procedures?

  1. Observe and record pump pressures and output (flow)
  2. Provide grease and oil lubrication in accordance with manufacture instructions
  3. Check pump alignment periodically to guard against premature bearing and coupling wear
  4. Tighten the packing glands if they are leaking excessively
  5. Regularly check for excessive or abnormal noise, vibration, heat, or odor
A
  1. Observe and record pump pressures and output (flow)
  2. Provide grease and oil lubrication in accordance with manufacturer instructions
  3. Check pump alignment periodically to guard against premature bearing and coupling wear
  4. Tighten the packing glands if they are leaking excessively
  5. Regularly check for excessive or abnormal noise, vibration, heat or odor
35
Q

Which routine operating procedure should be documented for a distribution system ?

  1. Disinfecting
  2. Inspecting
  3. Monitoring
  4. Locating underground facilities
  5. Repairing
A
  1. disinfecting
  2. inspecting
  3. monitoring
  4. locating underground facilities
  5. repairing
36
Q

Which factors should be considered when determining the tools and equipment needed for a water distribution system?

  1. Cost and efficiency
  2. Shorter service interruptions
  3. Ability of the tools or equipment to make the job easier for the operators
  4. Record keeping requirements
  5. Versatility of the tools or equipment for use in different O&M tasks
A
  1. Cost efficiency
  2. Shorter service interruptions
  3. Ability of the tools or equipment to make the job easier for the operators
  4. Versatility of the tools or equipment for use in different O&M tasks
37
Q

Which elements should be included in a water supplier’s cross-connection control program?

  1. Listing, prioritizing, and inspecting/reinspecting all existing facilities where cross connections are of concern
  2. Maintaining adequate pressures throughout the distribution system at all times to minimize hazards from undetected cross connections
  3. Routine testing of installed backflow prevention devices
  4. Obtaining a list of approved backflow prevention devices
  5. Training personnel on the chases and hazards of cross connections
A
  1. Listing, prioritizing, and inspecting/reinspecting all existing facilities where cross-connections are of concern
  2. Maintaining adequate pressures throughout the distribution system at all times to minimize hazards from undetected cross-connections
  3. Routine testing of installed backflow prevention devices
  4. Obtaining a list of approved backflow prevention devices
  5. Training personnel on the causes and hazards of cross connections
38
Q

Which industries use chemicals that may enter the public water distribution system through a cross-connection?

  1. Agriculture
  2. Plating plants
  3. Dye plants
  4. Steam boiler plants
  5. Cooling systems
A
  1. Agriculture
  2. Plating plants
  3. Dye plants
  4. Steam boiler plants
  5. Cooling systems
39
Q

Which types of maintenance are performed on distribution system pipes ?

  1. Lubricating
  2. Relining
  3. Disinfecting
  4. Repairing leaks and breaks
  5. Flushing
A
  1. relining
  2. disinfecting
  3. repairing leaks and breaks
  4. flushing
40
Q

How can vulnerability be reduced following a water distribution system vulnerability assessment?

  1. Increase stockpiles of materials and supplies
  2. Make alternative operation procedures available
  3. Improve emergency procedures , communications, and training
  4. Obtain additional repair equipment
  5. Obtain auxiliary booster pumps
A
  1. increase stockpiles of materials and supplies
  2. Make alternative operation procedures available
  3. improve emergency procedures, communications, and training
  4. obtain additional repair equipment
  5. obtain auxiliary booster pumps
41
Q

What are normal security measures taken to prevent vandalism at a water distribution system storage facility?

  1. Installing locks on doors and gates
  2. Patrolling the area
  3. Installing lighting
  4. Installing fences
  5. Posting signs
A
  1. Installing locks on doors and gates
  2. Patrolling the area
  3. Installing lighting
  4. Installing fences
  5. Posting signs
42
Q

Under what conditions is field disinfection of distribution system mains and reservoirs necessary?

  1. When they are new
  2. After repairs are made
  3. When operators need training and practice
  4. When testing new disinfection equipment
  5. Whenever there is any possibility of contamination
A
  1. when they are new
  2. after repairs are made
  3. whenever there is any possibility of contamination
43
Q

What kinds of water quality complaints could distribution system operators receive from consumers?

  1. Tastes and odors in the water
  2. Red water
  3. Something swimming in the water
  4. Sand and grit in the water
  5. Cloudy (air) water
A
  1. Taste and odors in the water
  2. red water
  3. something swimming in the water
  4. sand and grit in the water
  5. cloudy (air) water
44
Q

What benefits can results from a water audit ?

  1. Reduced legal liability
  2. Improved public relations
  3. Financial improvement
  4. Reduced water losses
  5. Reduced property damage
A
  1. Reduced legal liability
  2. Improved public relations
  3. Financial improvement
  4. Reduced water losses
  5. Reduced property damage
45
Q

What are required elements of backflow prevention program maintenance and testing procedures?

  1. The maintenance and testing procedures must be approved by state agencies
  2. These programs must require utilities with backflow prevention devices to maintain the devices in good working condition
  3. These programs must require the owners of building and facilities with backflow prevention devices to maintain the devices within their buildings and facilities in good working condition
  4. The maintenance and testing procedures must be approved by federal agencies
  5. These programs must require qualified persons to periodically test the backflow prevention devices for satisfactory performance
A
  1. These programs must require the owners of buildings and facilities with backflow prevention devices to maintain the devices within their buildings and facilities in good working condition
  2. Qualified persons must periodically test the backflow prevention devices for satisfactory performance

Drinking Water Distribution (9 decks)

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