Water Distribution Class 4

Front 1

Which of the following will least likely increase soil corrosiveness?
a. High acidity
b. Low soil moisture content
c. High alkalinity
d. Presence of sulfide

Back 1

b. Low soil moisture content

Front 2

What type of pipe joint is best to use under high groundwater and muddy conditions despite best efforts to pump the ground water out of the trench?

a. Push joint
b. Mechanical joint
c. Boltless ball joint
d. Tied rubber gasket joint

Back 2

b. Mechanical joint

Front 3

An arterial-loop distribution system has flow from how many directions?

a. 1
b. 2
c. 3
d. 4

Back 3

d. 4

Front 4

What should the flow meter read in gallons per minute if a 12-in diameter main is to be flushed at 5.0 fps?

a. 39.2
b. 78.5
c. 392
d 1,764

Back 4

d 1,764

Front 5

Where should bacteriological samples be collected in the distribution system?
a. Uniformly distributed throughout the system based on area.
b. At locations that are representative of conditions within the system.
c. Almost always from extreme locations in the system but occasionally at other locations.
d. Uniformly throughout the system based on population density.

Back 5

b. At locations that are representative of conditions within the system.

Front 6

The quantity of oxygen that can remain in water is related to
a. Temperature
b. pH
c. Turbidity
d. Alkalinity

Back 6

a. Temperature

Front 7

In coliform analysis using the presence-absence test, a sample should be incubated for

a. 24 hours at 25 C
b. 36 hours at 35 C
c. 24 and 36 hours at 25 C
d. 24 and 48 hours at 35 C

Back 7

d. 24 and 48 hours at 35 C

Front 8

What is the potential cross-connection hazard from sprinkler systems?
a. Low
b. Low to moderate
c. Moderate
d. High

Back 8

d. High

Front 9

What backflow prevention device has a center relief valve?
a. Double check valve assemply
b. Atmospheric vacuum breaker
c. Presence vacuum breaker assemply
d. Reduced pressure backflow assembly

Back 9

d. Reduced pressure backflow assembly

Front 10

As a rule, water pipes should be separated from sewer pipes by a horizontal distance of
a. 6 ft
b. 8 ft
c. 10 ft
d.12 ft

Back 10

c. 10 ft

Front 11

Fire hydrants should generally be set back from the curb by at least

a. 1 ft
b. 2.ft
c. 3 ft
d. 4 ft

Back 11

b. 2.ft

Front 12

How many valves should be installed on main intersections?

a. 1
b. 2
c. 3
d. 4

Back 12

c. 3

Front 13

Which of the following is associated with using a pressure tap to make connections of new mains to an existing main?

a. discolored water
b. large amounts of water loss
c. low probability of contamination
d. loss of fire protection

Back 13

c. low probability of contamination

Front 14

Which of the following valves should be used when it becomes necessary to supply water at different pressure zones?

a. Relief
b. Rotary
c. Pressure-reducing
d.Needle

Back 14

c. Pressure-reducing

Front 15

Which of the following pumps should be used to increase pressure at large distribution systems?
a. Positive displacement
b. Progressive cavity
c. Vertical turbine
d. Airlift

Back 15

c. Vertical turbine

Front 16

AWWA recommends 5/8-inch meters be tested every
a. 5 years
b. 8 years
c. 10 years
d. 20 years

Back 16

c. 10 years

Front 17

What is the term for electrochemical corrosion caused by the joining of two different metals?
a. concentration cell corrosion
b. bimetallic corrosion
c. tuberculation corrosion
d. pitting corrosion

Back 17

b. bimetallic corrosion

Front 18

Fire protection facilities for each community is evaluated by
a. USEPA
b. ISO
c. SDWA
d. City of county government

Back 18

b. ISO (The Insurance Services Office)

Front 19

Continued inhalation of radon gas is considered to contribute to which of the following?
a. Gastrointestinal disease
b. Hepatitis
c. Cholera
d. Lung cancer

Back 19

d. Lung cancer

Front 20

When work is being perfomed in streets, the flagman should be positioned at least how many feet in front of the work space?

a. 5 ft
b. 20 ft
c. 100 ft
d. 500 ft

Back 20

c. 100 ft

Front 21

Which health effect category refers to an organic chemical that is a known carcinogen?

a. Category I
b. Category II
c. Category III
d. Category IV

Back 21

a. Category I

Front 22

All occupied trenches 4 or more feet deep must provide exits at
a. 15-ft intervals
b. 20-ft intervals
c. 25-ft intervals
d. 30-ft intervals

Back 22

c. 25-ft intervals

Front 23

Records on bacteriological analysis should be kept for a minimum of
a. 5 years
b. 7 years
c. 10 years
d. 25 years

Back 23

a. 5 years

Front 24

What should a supervisor do if an employee is performing work in an unsafe manner?
a. discuss the incident with the employee during the next performance appraisal.
b. Stop the work immediately and train the employee to perform the work safely.
c. Call OSHA immediately to investigate the incident.
d. Give the employee a written warning that the work was performed unsafely.

Back 24

b. Stop the work immediately and train the employee to perform the work safely.

Front 25

What is the action level for lead?

a. 0.01 mg/L
b. 0.015 mg/L
c. 0.1 mg/L
d. 0.5 mg/L

Back 25

b. 0.015 mg/L

Front 26

How must water systems serving a population over 10,000 distribute the consumer confidence report to customers?

a. Television announcement
b. Radio announcement
c. Public meeting
d. Mail

Back 26

d. Mail

Front 27

What is the main reason for the poor accident record of operators?
a. lack of equipment
b. lack of interest
c. lack of time
d. lack of training

Back 27

d. lack of training

Front 28

Because of local climate conditions a system may have specific types of hydrants installed such as
a. cold climate, warm climate or hot weather hydrants.
b. dry barrel or wet barrel hydrants
c. dry top or wet top hydrants
d. post or flush hydrants

Back 28

b. dry barrel or wet barrel hydrants

Front 29

Leadership occurs as a result of
a. being born with certain traits
b. supervisory authority and position
c. the number of years on the job
d. the supervisor's ability to achieve employee willingness to follow.

Back 29

d. the supervisor's ability to achieve employee willingness to follow.

Front 30

Two constituents that should be regularly sampled and tested from the distribution are:
a. chlorine residual and turbity
b. coliform bacteria and chlorine residual
c. nitrate and coliform bacteia
d. turbidity and coliform bacteria

Back 30

b. coliform bacteria and chlorine residual

Front 31

If you were in charge of a large operation with 4 foremen, 3 whose work was exceptionally good and a 4th who was substandard, what would you do?
a. demote the person giving your reasons
b. find a replacement and then fire him
c, fire him and then look for a replacement
d. tell him of the shortcomings that bother you and offer help before any action is taken.

Back 31

d. tell him of the shortcomings that bother you and offer help before any action is taken.

Front 32

When a confined space is entered, the minimum number of workers on the job should be
a. one
b. two
c. three
d. three and a spotter or supervisor

Back 32

c. three

Front 33

All water distribution systems should have a __ that designates all arterial water mains, valves and hydrants.
a. comprehensive map
b. deed plat
c. description
d. full color chart

Back 33

a. comprehensive map

Front 34

In establishing permanent "ties" of references to a buried valve, what is the poorest reference point from which to measure?
a. building foundation
b. manhole
c. property corner
d. tree

Back 34

d. tree

Front 35

At the same flow, friction losses through a 12-inch main will be
a. less than through a 6-inch main
b. the same as through a 6-inch main
c. slightly more than through a 6-inch main
d. twice as much as through a 6-inch main

Back 35

a. less than through a 6-inch main

Front 36

You are getting complaints of stale water in a part of the system that is not looped. The temporary solution is to
a. flush hydrants
b. increase the chlorine dose
c. install mains to complete the loop
d. remove hydrogen suldide

Back 36

a. flush hydrants

Front 37

Where no yoke is used, an operator preparing to move a service meter should
a. Install a jumper wire and take care not to bridge the circuit with their body.
b. Put on rubber gloves and take care not to bridge the circuit with their body.
c. Shut off household electrical power.
d. Use rubber insulated tools and special rubber gloves.

Back 37

a. Install a jumper wire and take care not to bridge the circuit with their body.

Front 38

The most critical safety precaution when performing electrical thawing is

a. use only specially designed machines.
b. check that no current strays from the service line to the main and beyond,
c. limit the thawing current and voltage to less than 1000 VA.
d. Have the customer sign a release of liability.

Back 38

b. check that no current strays from the service line to the main and beyond,

Front 39

A foreman's monthly report should include
a. last time supervisor read report.
b. number of complaints received and investigated.
c. number of monthly reports prepared.
d. number of qualifiable workers available.

Back 39

b. number of complaints received and investigated.

Front 40

An operator is caught in a room where chlorine gas is leaking. If the operator does not have a mask, what should the operator do?
a. keep mouth closed, head as high as possible and quickly walk out of the room, holding breath if possible.
b. lay down on the floor and quickly crawl out of the room.
c. pull shirt over mouth and face and quickly walk out of the room.
d. walk out of the room quickly.

Back 40

a. keep mouth closed, head as high as possible and quickly walk out of the room, holding breath if possible.

Front 41

Two ways to reduce the chances of freezing in a water tank
a. close air vents and increase internal tank pressure.
b. hold the water level stable and increase chlorine concentration.
c. vary the water level and increase the maximum water level.
d. vary the water level and lower the max water level.

Back 41

d. vary the water level and lower the max water level.

Front 42

What is the most important and all inclusive aspect of supervision?
a. proper utilization of people
b. proper utilization of finances
c. proper utilization of equipment
d. proper utilization of all resources.

Back 42

d. proper utilization of all resources.

Front 43

Occasionally some of the people on a work crew will indulge in active horseplay. This should be
a. discouraged because some workers might not like it.
b. encouraged because it promotes good fellowship.
c. permitted as it is a form of relaxation.
d. stopped immediately because it is likely to cause an accident.

Back 43

d. stopped immediately because it is likely to cause an accident.

Front 44

Job specifications refers to
a. the functional elements of a position.
b. the information gained from employees who hold various positions.
c. personal or human qualities to perform the job adequately.
d. the principal duties and functions of various jobs, including the scope and kinds of authority related to these jobs.

Back 44

d. the principal duties and functions of various jobs, including the scope and kinds of authority related to these jobs.

Front 45

When working with electrical equipment outdoors
a. a ground fault interrupter power supply is required.
b. battery powered motor generator should be used instead of line voltage.
c. lie power grounding should be tested with volt-ohm meter.
d. none of the above.

Back 45

a. a ground fault interrupter power supply is required.

Front 46

A decrease in the gallons pumped from a well per kilowatt hour of electricity used indicates a(n)
a. decrease in well efficiency
b. increase in electric rates
c. increase in pump efficiency
d. none of the above

Back 46

a. decrease in well efficiency

Front 47

Word has just come down from the top that operating funds are being cut. How should this be handled?
a. cut supplies and repairs to balance the budget.
b. fire some of the less productive old employees.
c. keep it quiet and do what you have to "less said the better"
d. let other personnel know what the situation is and ask for their help.

Back 47

d. let other personnel know what the situation is and ask for their help.

Front 48

The customer's most memorable image of a utility is often
a. the professional public relations spokesperson.
b. the actions of the distribution field personnel.
c. radio and television reports on utilities.
d. bill stuffers with the monthly bill.

Back 48

b. the actions of the distribution field personnel.

Front 49

If galvanized iron fittings are connected to copper pipe in moist ground, you would expect which of these would occur first?
a. the copper pipe will corrode.
b. the copper pipe will scale and plug.
c. the galvanized fittings will scale and plug.
d. the galvanized iron will corrode.

Back 49

d. the galvanized iron will corrode.

Front 50

Areas subjected to higher than normal vandalism are usually
a. along heavily traveled streets.
b. secluded out of the way buildings.
c. well lighted, visible areas.
d. none of the above.

Back 50

b. secluded out of the way buildings.

Front 51

One of the employees in your crew complains about having to do a hard job. The proper thing to do is
a. explain that all employees must do their fair share of hard work as well as the easier tasks.
b. ignore the complaint.
c. promise that the next assignments will be easier ones.
d. take the employee off the job.

Back 51

a. explain that all employees must do their fair share of hard work as well as the easier tasks.

Front 52

Which type of pipe is most likely to be damaged by corrosion?
a. asbestos cement
b. reinforced concrete
c. steel
d. vitrified clay

Back 52

c. steel

Front 53

The location where residual pressure is measured should be
a. on the opposite nozzle of the flowing hydrant.
b. at the nearest hydrant upstream from the flowing hydrant.
c. between the source and the flowing hydrant.
d. none of the above

Back 53

b. at the nearest hydrant upstream from the flowing hydrant.

Front 54

How are valves checked to determine that they are holding properly?
a. by compressed air
b. by an electrostatic test
c. by a pressure test
d. by a torque wrench

Back 54

c. by a pressure test

Front 55

How can the supervisor be certain that scheduled maintenance is completed?
a. ask the workers.
b. hire someone to inspect completed work.
c. use a form that compares work assigned with work completed.
d. wait and see is there are any failures.

Back 55

c. use a form that compares work assigned with work completed.

Front 56

When an employee refuses to observe safety requirements because he "has learnt over the years that they're useless" what action should the immediate supervisor take?
a. approve of the employee's action
b. initiate immediate disciplinary action.
c. make the employee sign a hold harmless agreement.
d. tell the employee to ignore the situation.

Back 56

b. initiate immediate disciplinary action.

Front 57

The most important thing a supervisor can do regarding potential personnel problems is to
a. delay action in order to think about it.
b. have the personnel officer talk to the personnel involved.
c. seek advice from supervisors.
d. write each incident down, file it for reference and talk to the personnel involved.

Back 57

d. write each incident down, file it for reference and talk to the personnel involved.

Front 58

To properly train a new employee, you should
a. allow him to make errors without correcting him as he will learn in time.
b. have the employee wait to try a new operation when he can perform it perfectly.
c. keep the new employee away from older ones until you've had a chance to train him your own way.
d. pace carefully the amount of new materials you give the employee to learn.

Back 58

d. pace carefully the amount of new materials you give the employee to learn.

Front 59

Which is the correct type of valve for controlling the level of a treated water storage reservoir that is below the level of the hydraulic gradient?
a. altitude valve
b. check valve
c. pressure relief valve
d. reduced pressure backflow valve

Back 59

a. altitude valve

Front 60

Plastic service lines can be thawed by
a electrical equipment
b. hot air
c. hot water
d. all of the above

Back 60

c. hot water

Front 61

Two important considerations in locating storage are environmental impact and
a. proximity to treatment facilities
b. maintaining system pressure
c. distance from pumping station
d. distance from load control center

Back 61

b. maintaining system pressure

Front 62

The most common problem with ductile iron pipe is
a. cutting the pipe
b. pipe flexibility
c. lack of being malleable
d. limitations on pressure

Back 62

a. cutting the pipe

Front 63

Air tanks on storage tanks require
a. mesh screens to prevent entry of animals and birds.
b. fine screens to prevent entry of animals, birds and insects.
c. filters to prevent entry of dirt and airborne pollutants.
d. grates to prevent vandalism and unauthorized access.

Back 63

a. mesh screens to prevent entry of animals and birds.

Front 64

If an older system with excessive tuberculation exhibited persistent red water problems, it would be advisable to
a. alternate flow velocity and pressure changes.
b. alternate PH adjustments to vary precipitation.
c. clean the mains before attempting to apply a protective coating with the stabilization treatment process.
d. increase the chemical dosage during the stabilization treatment process.

Back 64

c. clean the mains before attempting to apply a protective coating with the stabilization treatment process.

Front 65

To be sure a dry barrel hydrant is draining after the test is completed
a. attach a negative pressure gauge to the nozzle.
b. feel for a suction through the nozzle.
c. hang a plumb bob into the hydrant.
d. use sonic leak detection listening equipment.

Back 65

b. feel for a suction through the nozzle.

Front 66

The major reason why the person in charge of a public relations program should be a member of upper management is
a. the ability to influence policy.
b. being in a position of telling irate customers why they are wrong.
c. that no one in lower ranks eants it.
d. the public accepts it better.

Back 66

a. the ability to influence policy.

Front 67

When excessively worn, positive displacement and other meters will usually
a. give erratic, unpredictable readings.
b. register more water than has actually passed.
c. register less water than has actually passed.
d. none of the above

Back 67

c. register less water than has actually passed.

Front 68

An organizational chart shows
a. the formal organization, including the overall structure.
b. the formal organization, including the personnel contact with the organization.
c. both the formal and informal organization.
d. the scope of authority and responsibility of managerial positions.

Back 68

a. the formal organization, including the overall structure.

Front 69

The least head loss in a pipeline would be caused by a fully open
a. angle valve
b. check valve
c. gate valve
d. globe valve

Back 69

c. gate valve

Front 70

In a parallel circuit, if one unit is burned out or disconnected, the other units will
a. become overloaded
b. cease to function
c. cease to function and then resume when the unit is replaced
d. continue to function

Back 70

d. continue to function

Front 71

Cathodic protection systems for tanks commonly use sacrificial anodes and
a. unpowered iron cathodes
b. an integrated circuit controller
c. an alternating current power source.
d. a direct current power supply

Back 71

d. a direct current power supply

Front 72

Automation of a water system should provide
a. constant pressure
b. cross connection control
c. prevention of corrosion
d. prevention of main breaks

Back 72

a. constant pressure

Front 73

Who is ultimately responsible for being sure that your agency has a good record keeping system
a. everyone
b. field workers
c. foremen
d. supervisor

Back 73

d. supervisor

Front 74

A reduced pressure zone backflow preventer will
a. stop back-siphonage but not back-pressure.
b. stop back-pressure but not back-siphonage.
c. stop back-pressure and back-siphonage.
d. stop air from getting into the system.

Back 74

c. stop back-pressure and back-siphonage.

Front 75

Which one of the following is unlikely to occur in the distribution system?
a. increase color
b. increase in dissolved gasses
c. increase in taste and odor
d. increase in turbidity

Back 75

b. increase in dissolved gasses

Front 76

Disaster planning is
a. a good training technique.
b. having manuals ready so they can be read if a disaster occurs.
c. something, if properly done, will not need to be revised.
d. none of the above

Back 76

a. a good training technique.

Front 77

What does not materially affect the friction loss in a given length of pipe?
a. hardness of water.
b. number of fittings.
c. roughness of the interior of the pipe.
d. velocity of the flow.

Back 77

a. hardness of water.

Front 78

The maximum flow to be expected through a standard 5/8 x 3/4 meter is __ gpm.
a. 5
b. 10
c. 20
d. 30

Back 78

c. 20

Front 79

To test a 110 V/AC, set the volt-ohm meter for
a. 100 A
b. 100 V/AC
c. 250 A
d. 250 V/AC

Back 79

d. 250 V/AC

Front 80

Two major requirements in sizing a service are adequate
a. corrosion resistance and longevity.
b. flow rate and C-factor
c. flow rate and volume
d. pressure and flow rate

Back 80

d. pressure and flow rate

Front 81

Objectives for a preventive maintenance program include
a. eliminate parts inventory.
b. get organized to stop overflowing storage tanks quickly.
c. increase use of standby equipment.
d. reduce emergency repairs and maintenance.

Back 81

d. reduce emergency repairs and maintenance.

Front 82

Which type of soil requires the
shallowest Maximum Allowable Slope or the widest trench?

A. Type 1
B. Type 2
C. Type 3

Back 82

C. Type 3