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Distribution Assessments
Water Distribution Assessments
75
Environmental Studies
12th Grade
07/09/2014

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Cards

Term
One indication of corrosive water is a high concentration of:

A. Algae odors
B. Carbon dioxide
C. Carbonates
D. Total dissolved solids
Definition
D. Total dissolved solids
Term
At the same barometric pressure the amount of dissolved oxygen in cold water tends to be ______ the amount of dissolved oxygen in warm water.

A. Less than
B. More than
C. More or less than (depending on the biological oxygen demand.
D. The same as
Definition
B. More than
Term
A "competent person" at an excavation work site

A. Is capable of identifying hazards and has the authority to take corrective measures.
B. Is responsible for accidents at the work site.
C. Must be a professional engineer.
D. Must fill out a written inspection prior to workers entering an excavation.
Definition
A. Is capable of identifying hazards and has the authority to take corrective measures.
Term
Which of the following is the principal constituent in water that causes corrosion of metals?

A. Alkalinity
B. Dissolved oxygen
C. Hydrogen sulfide
D. Sodium chloride
Definition
B. Dissolved oxygen
Term
A competent person must inspect excavations and adjacent areas for hazards:

A. Continuously while workers are inside the excavation
B. Hourly while workers are inside the excavation
C. Prior to the start of each day only
D. Daily prior to the start of work and as needed throughout the shift
Definition
D. Daily prior to the start of work and as needed throughout the shift
Term
An average percentage range for unaccounted-for water in a fully metered system is:

A. 0 to 5%
B. 6 to 10%
C. 11 to 15%
D. 16 to 20%
Definition
C. 11 to 15%
Term
The primary health risk associated with synthetic organic compounds (SOCs) is:

A. Acute respiratory diseases
B. Cancer
C. "Blue baby" syndrome
D. Reduced I. Q. in children
Definition
B. Cancer
Term
A public water system must comply with Safe Drinking Water Act (SDWA) regulations based on:

A. Population range
B. Size of community
C. Financial ability
D. All of the above
Definition
D. All of the above
Term
The difference between the static ground water level and the pumping level is the:

A. Radius of influence
B. Draw down
C. Cone of depression
D. Watershed
Definition
B. Draw down
Term
A customer complaint about the presence of brown floc in tap water can best be handled by:

A. Denying that it is from your pipes
B. Scheduling a visit to the premises later in the week
C. Investigating the problem as soon as possible
D. Asking the customer to send a sample to the Division of Health
Definition
C. Investigating the problem as soon as possible
Term
The term "aquifer" relates to which one of the following?
A. Surface water
B. Lake
C. Stream
D. Groundwater
Definition
D. Groundwater
Term
Cathodic protection means protection against:

A. Contamination
B. Corrosion
C. Hardness
D. Infiltration
Definition
B. Corrosion
Term
The primary reason for using a dry barrel fire hydrant is too:

A. Allowing easy maintenance of the hydrant
B. Keep the barrel from rusting
C. Minimize water hammer
D. Keep the hydrant from freezing
Definition
D. Keep the hydrant from freezing
Term
The component parts of a well include all of the following except:

A. Sanitary seal
B. Well screen
C. Pressure switch
D. Cement grout
Definition
C. Pressure switch
Term
Which component of a centrifugal pump moves the water?

A. Cylinder
B. Impeller
C. Shaft
D. Valve
Definition
B. Impeller
Term
A record containing the size, location, and types of water mains; valves; hydrants; tanks; reservoirs; and pump stations is called a

A. Road atlas
B. Comprehensive map
C. System atlas
D. Charles atlas
Definition
B. Comprehensive map
Term
What term describes water that is suitable for drinking?

A. Potable
B. Palatable
C. Colorless
D. Clean
Definition
A. Potable
Term
A pump delivering 288, 000 gallons of water in 24 hours operates at what average flow rate?

A. 100 gallons per minute
B. 200 gallons per minute
C. 1000 gallons per minute
D. 12000 gallons per minute
Definition
B. 200 gallons per minute

288,000 gal/1440 min per day = 200gpm
Term
Velocity of flow in mains is usually expressed in terms of:

A. Feet per second
B. Gallons per minute
C. Liters per foot
D. Milligrams per liter
Definition
A. Feet per second
Term
Hydrogen sulfide gas smells like:

A. Dead fish
B. Fuel gas
C. Rotten eggs
D. Pickled pigs feet
Definition
C. Rotten eggs
Term
Which of the following methods can be used to remove high iron content from a well supply?

A. Oxidation and filtration
B. Aerate it with carbon dioxide
C. Decreased flow
D. Retained until it settles out
Definition
A. Oxidation and filtration
Term
Hardness may be expressed in:

A. Milligrams per liter as CaCO3
B. Milligrams per liter
C. Pounds per day
D. Pounds per million gallons
Definition
A. Milligrams per liter as CaCO3
Term
The basic unit of electrical power is the:

A. Fouling
B. Ohm
C. Volt
D. Watt
Definition
D. Watt
Term
A standpipe is 84 inches in diameter and 20 feet high. How many gallons are in the standpipe when the water is 16 feet deep?

A. 615
B. 736
C. 4,603
D. 5,754
Definition
C. 4,603

84" dia/12"= 7' dia

((7')2) x .785 x 16' x 7.48gal/cu ft = 4,603 gal
Term
Check valves are used to:

A. Permit air to escape from pipe
B. Permit flow in only one direction
C. Regulate velocity
D. Stop flow in both directions
Definition
B. Permit flow in only one direction
Term
Standard pumper-connection fire hydrants should not be installed on water mains smaller than ______ inches in diameter.

A. 4
B. 6
C. 8
D.10
Definition
B. 6
Term
Beards or long sideburns prohibit an operator from safely

A. Acting as a lifeline attendant
B. Entering a confined space
C. Serving as a first-aid specialist
D. Wearing a face mask of a self-contained breathing apparatus
Definition
D. Wearing a face mask of a self-contained breathing apparatus
Term
The water table is defined as the

A. Pumping level in a well
B. Upper surface of the groundwater
C. Water level in a reservoir
D. Water level obtained in a well after penetrating several aquifers
Definition
B. Upper surface of the groundwater
Term
The shaft speed of an electric motors is most commonly expressed in units of

A. Feet per second per second
B. Feet per second
C. Revolutions per second
D. Revolutions per minute
Definition
D. Revolutions per minute
Term
A coupon test installation in a distribution system is used to

A. Determine the system's water quality
B. Determine the rate of scaling or corrosion
C. Calculate the daily treatment changes
D. Assist in calculating hydrant flows
Definition
B. Determine the rate of scaling or corrosion
Term
Disease-causing bacteria are known as

A. Coliforms
B. Noncoliforms
C. nonpathogenic
D. Pathogenic
Definition
D. Pathogenic
Term
Normally, surface water and groundwater have a pH range of

A. 9.0 to 10.5
B. 6.8 to 8.5
C. 1.5 to 4.0
D. None of the above
Definition
B. 6.8 to 8.5
Term
Which is the best definition of turbidity in the water?

A. Anything in water that scatters light
B. Sequestered iron and manganese particles
C. The amount of dissolved material in the water
D. The combined optical effect of pH, chlorine, and color
Definition
A. Anything in water that scatters light
Term
The components of a centrifugal pump sometimes installed on the end of a suction pipe to hold the priming is known as a

A. Casing
B. Drain
C. Foot valve
D. Ventilator
Definition
C. Foot valve
Term
The principal purpose of an altitude valve on an elevated tank is to

A. Control maximum filling level in distribution storage
B. Maintain constant static head in the distribution system
C. Maintain uniform flow from elevated storage
D. Restrict water flow to high-demand areas
Definition
A. Control maximum filling level in distribution storage
Term
The term "primacy" means the

A. authority by the state to supersede the USEPA drinking water regulations
B. Authority by the USEPA to supersede state drinking water regulations
C. Requirement for states to maintain drinking water regulations more stringent than the USEPA regulations
D. Primary authority for implementation and enforcement of drinking water regulations
Definition
D. Primary authority for implementation and enforcement of drinking water regulations
Term
Reciprocating positive-displacement pumps are also known as

A. Air lift pumps
B. Centrifugal pumps
C. Piston pumps
D. Pneumatic injector
Definition
C. Piston pumps
Term
Moderately hard water will have a hardness range of _______mg/l as calcium carbonate

A. 0 to 60
B. 61 to 120
C. 121 to 180
D. Over 180
Definition
B. 61 to 120
Term
A common method for removing hydrogen sulfide from water is

A. Aeration
B. Coagulation
C. Filtration
D. Sedimentation
Definition
A. Aeration
Term
The treatment process designed to kill pathogenic organisms is

A. Disinfection
B. Oxidation
C. Pasteurization
D. Sterilization
Definition
A. Disinfection
Term
Lead in drinking water can result in

A. Prostate cancer in my men
B. Impaired mental functioning in children
C. Stomach and intestinal disorders
D. Reduced white blood cell count
Definition
B. Impaired mental functioning in children
Term
A disease that might be transmitted to a new victim through water is

A. Diphtheria
B. Gonorrhea
C. Malaria
D. Typhoid
Definition
D. Typhoid
Term
A cross connection is defined as a connection between

A. A potable water system and a non potable water system
B. A high pressure system and a low pressure system
C. Two different size pipe
D. A cross on a water main
Definition
A. A potable water system and a non potable water system
Term
Back siphonage is caused by

A. Excessive pressure in the line
B. Partial vacuum in the line
C. A small leak
D. Water hammer
Definition
B. Partial vacuum in the line
Term
5 milligrams per liter equal _______ parts per million

A. 2.5
B. 5.0
C. 10
D. 50
Definition
B. 5.0
Term
When the pumping rate is increased, the effect on the cone of depression is to

A. Decrease the drawdown
B. Decrease the radius of influence
C. Lower the pumping level
D. Raise the pumping level
Definition
C. Lower the pumping level
Term
Which chemical is most often used to disinfect public water supplies?

A. Bromine
B. Chlorine or chlorine compounds
C. Iodine
D. Ozone
Definition
B. Chlorine or chlorine compounds
Term
The purpose of a surge tank is too

A. Control water hammer
B. Prevent contamination of water by backflow
C. Provide emergency storage
D. Provide high pressure water for use in fire protection
Definition
A. Control water hammer
Term
The presence of total coliforms in drinking water indicates

A. The potential presence of pathogens
B. The presence of pathogens
C. The absence of an adequate chlorine residual
D. An urgent public health problem exists
Definition
A. The potential presence of pathogens
Term
The term "MCL" means

A. Maximum chlorine residual level
B. Maximum coliform level
C. Multi colonies level
D. Maximum contaminant level
Definition
D. Maximum contaminant level
Term
The primary origin of coliforms in water supplies is

A. Natural algae growth
B. Industrial solvents
C. Fecal contamination by warm-blooded animals
D. acid rain
Definition
C. Fecal contamination by warm-blooded animals
Term
The primary source of trihalomethanes (THMs) in drinking water is

A. Industrial solvents
B. Polymer coagulants
C. Leaching from paint linings in water storage tanks
D. The reaction of chlorine compounds and organic matter
Definition
D. The reaction of chlorine compounds and organic matter
Term
An air gap device is used to

A. Clean lines
B. let air in manholes
C. Prevent backflow of non potable water into a drinking water supply
D. Test for oxygen deficiency
Definition
C. Prevent backflow of non potable water into a drinking water supply
Term
The primary health risk associated with trihalomethanes (THMs) is

A. Gastrointestinal diseases
B. Nervous system damage
C. Cancer
D. Increased blood pressure
Definition
C. Cancer
Term
The purpose of the fusible plug in a chlorine tank is too

A. Identify the cylinder
B. Keep the cylinder cool
C. Prevent the cylinder from exploding at high temperatures
D. Provide a means to hang the cylinders
Definition
C. Prevent the cylinder from exploding at high temperatures
Term
Which is the most accurate statement concerning potable water lines?

A. They may be used for backflushing pumps only when the pump is shut off
B. They can be connected to a contaminated source if the normal water pressure is higher than the pressure in the contaminated source
C. They must never be connected to a contaminated water source
D. None of the above statements are accurate
Definition
C. They must never be connected to a contaminated water source
Term
The primary source(s) of synthetic organic compounds (SOC) contamination in water supplies is(are)

A. Industrial solvents and agricultural pesticides
B. Mammalian fecal contamination of surface water
C. Agricultural fertilizers and natural mineral deposits
D. Disinfection byproducts
Definition
A. Industrial solvents and agricultural pesticides
Term
Water samples are analyzed for the coliform group of bacteria, because these bacteria

A. Are pathogenic
B. Cause typhoid
C. Indicate that the water is safe
D. Indicate the possible presence of disease causing organisms
Definition
D. Indicate the possible presence of disease causing organisms
Term
Lead in drinking water is primarily the result of

A. Naturally occurring mineral deposits
B. Industrial pollution
C. Corrosion within the distribution system and residential plumbing
D. Automobile exhaust
Definition
C. Corrosion within the distribution system and residential plumbing
Term
Pressure in a pipeline may be affected by

A. Color and turbidity
B. Friction and elevation
C. Hardness and temperature
C. Turbidity and temperature
Definition
B. Friction and elevation
Term
What is the difference between a maximum contaminant level (MCL) and a secondary maximum contaminant level (SMCL)?

A. MCL violations automatically trigger acute violations, while violations of SMCLs do not
B. MCLs relate to health effects, while SMCLs relates to aesthetic concerns
C. MCL violation levels may not be superseded by the state, while SMCL violation levels may
D. MCLs relate to known effects of contaminants, while SMCLs relate to suspected effects of contaminants
Definition
B. MCLs relate to health effects, while SMCLs relates to aesthetic concerns
Term
The purpose of an electrical lockout devices is to

A. Introduce electric current to a specific circuit
B. Keep operators out of an electrical control room while maintenance is being performed
C. Lock out an electrical switch box door
D. Positively prevent the operation of an electrical circuit
Definition
D. Positively prevent the operation of an electrical circuit
Term
The maximum contaminant levels goal (MCLG) of known or probable carcinogens is

A. Set by the state
B. The same as the maximum contaminant levels (MCL)
C. The minimum detectable level of a given contaminant
D. zero
Definition
D. zero
Term
And objectional feature of iron and manganese in water is

A. Health hazard
B. Mottled teeth
C. Skin irritation
D. Staining of fixtures
Definition
D. Staining of fixtures
Term
The pressure that a pump must operate against is measured in

A. Foot pounds
B. Milligrams per liter
C. Pounds per square inch
D. Horsepower
Definition
C. Pounds per square inch
Term
If the speed of a centrifugal pump is increased, and the head remains the same, the gallons per minute output will

A. Decrease
B. Increase
C. Remain the same
D. Increase slightly, then decrease
Definition
B. Increase
Term
A suspension of very minute particles that cause an appearance of cloudiness is called

A. Bacteria
B. Color
C. Dissolved solids
D. Turbidity
Definition
D. Turbidity
Term
The diameter of a cylindrical tank is 10 feet. If filled to a depth of 10 feet, it will contain approximately how many gallons of water?

A. 2,987
B. 5,872
C. 6,024
D. 10,602
Definition
B. 5,872

((10')2) x .785 x 10' x 7.48gal/cu ft = 5871.8 gal
Term
How many cubic yards of earth are excavated if you dig a trench 3 feet wide, 9 feet deep, and 1,200 feet long?

A. 300
B. 900
C. 1,200
D. 2,700
Definition
C. 1,200

3' x 9' x 1,200' = 32,400 cu ft

32,400 cu ft x 1cu yard/27 cu ft = 1,200 cu yards

or

32,400 cu ft / 27 cu ft / cu yard = 1,200 cu yards
Term
Hardness in water is caused by

A. Alum
B. Calcium and magnesium
C. Chloride and fluoride
D. Sodium and potassium
Definition
B. Calcium and magnesium
Term
Contaminant monitoring requirements can depend on

A. Previous violations of maximum contaminant levels (MCLs)
B. The results of a vulnerability assessment
C. The size of the water system
D. All of the above
Definition
D. All of the above
Term
Sodium hypochlorite is

A. A compound that can be purchased in liquid solution and can be used for disinfection
B. A dry neutralizing powder for chlorine burns
C. Classified as an acid
D. The salt that is formed when hydrochloric acid is neutralized by sodium hydroxide
Definition
A. A compound that can be purchased in liquid solution and can be used for disinfection
Term
The abbreviation "DO" stands for

A. Dissolve organics
B. Dissolved oxygen
C. Direct oxidation
D. Diamino oxide
Definition
B. Dissolved oxygen
Term
High nitrate concentrations in water can affect

A. Mottled tooth enamel
B. Heart disease
C. Infants
D. Taste
Definition
C. Infants
Term
A corporation stop is used to

A. Connect galvanized steel pipe
B. Connect plastic pipe
C. Connect to the water meter
D. Connect the service line to the water main under pressure
Definition
D. Connect the service line to the water main under pressure
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