Operation And Maintenance Flashcards
What water quality safeguards protect against minor vandalism?
a. Locks on doors and gates
b. Chlorine residual and large dilution factor
c. Reservoir covers and vent screens
d. Turbidity and alkalinity
Chlorine residual and large dilution factor
What may a lack of chlorine residual indicate?
a. Heavy contamination
b. Need for a cross-connection control program
c. Adequate control of coliform aftergrowth
d. Poor sampling techniques
Heavy contamination
What is backsiphonage?
a. A form of backflow caused by a negative or below atmospheric pressure within the water supply piping
b. A form of flow created by higher than normal pressures in the water supply piping
c. A form of reverse flow caused by excessive contamination of the water supply piping
d. A form of siphoning water out of containers or tanks into the water mains
A form of backflow caused by a negative or below atmospheric pressure within the water supply piping
What is the water user’s responsibility in a cross-connection control program?
a. Promulgating and enforcing laws, rules, regu-lations, and policies needed to control cross-connections
b. Keeping contaminants out of the potable water system on the user’s premises
c. Managing a program that ensures maintenance of an adequate cross-connection control program
d. Listing and inspecting all existing facilities where cross-connections are of concern
Keeping contaminants out of the potable water system on the user’s premises
Why must a continuous positive pressure be maintained at all times in the water distribution system?
a. To have water available for fire protection
b. To minimize complaints from lack of water
c. To prevent contamination from backflow
d. To reduce unaccounted-for water losses due to leaks
To prevent contamination from backflow
What is the main function of a distribution storage facility?
a. To allow operators time for training during low demand periods
b. To keep facilities operating during minimum flow periods
c. To provide for park facilities in conjunction with the storage facility
d. To take care of daily demands and especially peak demands
To take care of daily demands and especially peak demands
Why should pump alignment be checked periodically?
a. To guard against premature bearing and coupling wear
b. To prevent excessive or abnormal noise, vibration, heat, and odor
c. To prevent the pump from running dry
d. To guard against undue packing wear and even a scored shaft or sleeve
To guard against premature bearing and coupling wear
What is the purpose of pipe flushing?
a. To clean out distribution pipelines by remov. ing any impurities or sediment that may be present in the pipe
b. To maintain minimum dry weather flows in nearby creeks
c. To remove stale or stagnant water from the system
d. To swab out the inside of pipes prior to disinfection
To clean out distribution pipelines by remov. ing any impurities or sediment that may be present in the pipe
Why are test pipe specimens (coupons) placed in water distribution systems?
a. To measure the cavitation of water
b. To measure the corrosiveness of water
c. To measure the flow of water
d. To measure the velocity of water
To measure the corrosiveness of water
When must distribution system storage facilities be disinfected?
a. When the chlorine residual becomes too high
b. When the system pressure is too low
c. When they are taken out of service for any reason
d. Whenever bacteriological samples are collected
When they are taken out of service for any reason
What makes for a good filing system for water distribution system records?
a. Can be easily used and understood, readily accessible, and protected from damage in a safe environment
b. Only accepts paper copies of important information
c. Requires transferring information from one format to another
d. Retains all records indefinitely
Can be easily used and understood, readily accessible, and protected from damage in a safe environment
What is a SCADA system?
a. Computer control system
b. Engineering drawings that show the depth of pipe, pipe location, and the correct distance from a reference starting point
c. Software that links geographic information with descriptive information
d. Computer recordkeeping system
Computer control system
What will determine what equipment and stores are needed and how much should usually be kept on hand?
a. Motorized equipment categories
b. Available storage facilities
c. System requirements
d. Number of employees
System requirements
What are the economic benefits of natural land-scaping?
a. Reduced costs of landscape installation and maintenance and stormwater management facilities
b. Reduced soil erosion, air and noise pollution, and greenhouse effects
c. Habitat restoration and protection and site beautification
d. Increased public awareness and understanding of the importance of protecting and conserving water and other natural resources
Reduced costs of landscape installation and maintenance and stormwater management facilities
