Distribution Assessments
One indication of corrosive water is a high concentration of:

A. Algae odors
B. Carbon dioxide
C. Carbonates
D. Total dissolved solids

D. Total dissolved solids
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

B. More than
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.

A. Is capable of identifying hazards and has the authority to take corrective measures.
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

B. Dissolved oxygen
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

D. Daily prior to the start of work and as needed throughout the shift
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%

C. 11 to 15%
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

B. Cancer
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

D. All of the above
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

B. Draw down
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

C. Investigating the problem as soon as possible
The term “aquifer” relates to which one of the following?
A. Surface water
B. Lake
C. Stream
D. Groundwater
D. Groundwater
Cathodic protection means protection against:

A. Contamination
B. Corrosion
C. Hardness
D. Infiltration

B. Corrosion
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

D. Keep the hydrant from freezing
The component parts of a well include all of the following except:

A. Sanitary seal
B. Well screen
C. Pressure switch
D. Cement grout

C. Pressure switch
Which component of a centrifugal pump moves the water?

A. Cylinder
B. Impeller
C. Shaft
D. Valve

B. Impeller
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

B. Comprehensive map
What term describes water that is suitable for drinking?

A. Potable
B. Palatable
C. Colorless
D. Clean

A. Potable
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

B. 200 gallons per minute

288,000 gal/1440 min per day = 200gpm

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

A. Feet per second
Hydrogen sulfide gas smells like:

A. Dead fish
B. Fuel gas
C. Rotten eggs
D. Pickled pigs feet

C. Rotten eggs
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

A. Oxidation and filtration
Hardness may be expressed in:

A. Milligrams per liter as CaCO3
B. Milligrams per liter
C. Pounds per day
D. Pounds per million gallons

A. Milligrams per liter as CaCO3
The basic unit of electrical power is the:

A. Fouling
B. Ohm
C. Volt
D. Watt

D. Watt
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

C. 4,603

84″ dia/12″= 7′ dia

((7′)2) x .785 x 16′ x 7.48gal/cu ft = 4,603 gal

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

B. Permit flow in only one direction
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

B. 6
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

D. Wearing a face mask of a self-contained breathing apparatus
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

B. Upper surface of the groundwater
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

D. Revolutions per minute
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

B. Determine the rate of scaling or corrosion
Disease-causing bacteria are known as

A. Coliforms
B. Noncoliforms
C. nonpathogenic
D. Pathogenic

D. Pathogenic
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

B. 6.8 to 8.5
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

A. Anything in water that scatters light
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

C. Foot valve
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

A. Control maximum filling level in distribution storage
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

D. Primary authority for implementation and enforcement of drinking water regulations
Reciprocating positive-displacement pumps are also known as

A. Air lift pumps
B. Centrifugal pumps
C. Piston pumps
D. Pneumatic injector

C. Piston pumps
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

B. 61 to 120
A common method for removing hydrogen sulfide from water is

A. Aeration
B. Coagulation
C. Filtration
D. Sedimentation

A. Aeration
The treatment process designed to kill pathogenic organisms is

A. Disinfection
B. Oxidation
C. Pasteurization
D. Sterilization

A. Disinfection
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

B. Impaired mental functioning in children
A disease that might be transmitted to a new victim through water is

A. Diphtheria
B. Gonorrhea
C. Malaria
D. Typhoid

D. Typhoid
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

A. A potable water system and a non potable water system
Back siphonage is caused by

A. Excessive pressure in the line
B. Partial vacuum in the line
C. A small leak
D. Water hammer

B. Partial vacuum in the line
5 milligrams per liter equal _______ parts per million

A. 2.5
B. 5.0
C. 10
D. 50

B. 5.0
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

C. Lower the pumping level
Which chemical is most often used to disinfect public water supplies?

A. Bromine
B. Chlorine or chlorine compounds
C. Iodine
D. Ozone

B. Chlorine or chlorine compounds
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

A. Control water hammer
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

A. The potential presence of pathogens
The term “MCL” means

A. Maximum chlorine residual level
B. Maximum coliform level
C. Multi colonies level
D. Maximum contaminant level

D. Maximum contaminant level
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

C. Fecal contamination by warm-blooded animals
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

D. The reaction of chlorine compounds and organic matter
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

C. Prevent backflow of non potable water into a drinking water supply
The primary health risk associated with trihalomethanes (THMs) is

A. Gastrointestinal diseases
B. Nervous system damage
C. Cancer
D. Increased blood pressure

C. Cancer
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

C. Prevent the cylinder from exploding at high temperatures
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

C. They must never be connected to a contaminated water source
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

A. Industrial solvents and agricultural pesticides
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

D. Indicate the possible presence of disease causing organisms
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

C. Corrosion within the distribution system and residential plumbing
Pressure in a pipeline may be affected by

A. Color and turbidity
B. Friction and elevation
C. Hardness and temperature
C. Turbidity and temperature

B. Friction and elevation
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

B. MCLs relate to health effects, while SMCLs relates to aesthetic concerns
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

D. Positively prevent the operation of an electrical circuit
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

D. zero
And objectional feature of iron and manganese in water is

A. Health hazard
B. Mottled teeth
C. Skin irritation
D. Staining of fixtures

D. Staining of fixtures
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

C. Pounds per square inch
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

B. Increase
A suspension of very minute particles that cause an appearance of cloudiness is called

A. Bacteria
B. Color
C. Dissolved solids
D. Turbidity

D. Turbidity
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

B. 5,872

((10′)2) x .785 x 10′ x 7.48gal/cu ft = 5871.8 gal

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

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

Hardness in water is caused by

A. Alum
B. Calcium and magnesium
C. Chloride and fluoride
D. Sodium and potassium

B. Calcium and magnesium
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

D. All of the above
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

A. A compound that can be purchased in liquid solution and can be used for disinfection
The abbreviation “DO” stands for

A. Dissolve organics
B. Dissolved oxygen
C. Direct oxidation
D. Diamino oxide

B. Dissolved oxygen
High nitrate concentrations in water can affect

A. Mottled tooth enamel
B. Heart disease
C. Infants
D. Taste

C. Infants
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

D. Connect the service line to the water main under pressure
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