Pineville Water 1 And 2

Front 1

What term is used when a water utility divides its operating expenses into the total revenue?

Back 1

Operating ratio

Front 2

Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor to deliver potable water of proper quantity only as far as the

Back 2

Consumers tap inside the home

Front 3

What agent is responsible for reporting lab results to the regulatory agency?

Back 3

Water system operator

Front 4

According to the USEPA drinking water regulations, the owner or operator of a public water system which fails to comply with applicable monitoring requirements must give notice to the public within

Back 4

3 months of the violation in a daily newspaper in the area served by the system

Front 5

Dynamic head is best described as the

Back 5

Total energy that a pump must develop for pumping to take place

Front 6

A mixture of air and gas is considered hazardous when the mixture exceeds what percentage of the lower explosive limit (LEL)?

Back 6

10%

Front 7

Which of the following duties should not be performed by a small system operator?

A. Disinfect water mains

B. Observe pump and motors to detect unusual noises, vibrations or excessive heat

C. Repair and overhaul chlorinators

D. Wire pump, compressors and electrical components of the water system

Back 7

Wire pump, compressors and electrical components of the water system

Front 8

What safety procedure should an operator always follow when mixing a solution of sodium hypochlorite (liquid bleach) and fresh water?

Back 8

Wear goggles and gloves when handling hypochlorite

Front 9

Which form of hypochlorite is most dangerous to handle?

Sodium

Fluoride

Calcium

Chlorine

Back 9

Calcium

Front 10

What document provides a profile of hazardous substances?

Back 10

MSDS material safety data sheets

Front 11

The major source of error when obtaining water quality information is improper

Back 11

Sampling

Front 12

A composite sample should never be sedimentation when sampling for which contaminant?

Back 12

Bacteria

Front 13

When should water quality samples for chlorine residual be analyzed?

Back 13

Immediately

Front 14

What is the chemical formula for sulfuric acid?

Back 14

H 2 S0 4

Front 15

Which of the following should not be used to draw a sample into a pipet?

Mouth

Bulb

Pump

Straw

Back 15

Mouth

Front 16

Where should sodium hypochlorie (liquid bleach) be stored?

Back 16

Away from equipment that is susceptible to corrosion

Front 17

A weir should be uses to measure water in which of the following locations?

Above ground storage tanks

Household service lines

Open channels

Water mains

Back 17

Open channels

Front 18

The pumping water level is best defined as the distance from the top of the well to the

Back 18

Water after the pump has been operating for a period of time

Front 19

The space between the inner or protective casing and the outer casing or drill hole should be filled with cement grout to a minimum of how many feet?

Back 19

10 feet

Front 20

The difference between the static groundwater level and the pumping water level

Back 20

Draw down

Front 21

The term aquifer relates to which one of the following?

Surface water

Lake

Stream

Groundwater

Back 21

Groundwater

Front 22

Which is the best definition of turbidity in water?

Anything that scatters light

Sequestered iron and manganese particles

The amount of dissolved material in water

The combined optical effec of pH chlorine. And color

Back 22

Anything in water that scatters light

Front 23

A "competent person" must inspect excavations and adjacent areas for hazards

.continuously while workers are inside the excavation

.hourly while workers are inside the excavation

.prior to the start of work each day only

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

Back 23

Daily, prior to the start of work, and as needed throughout the shift

Front 24

The principal purpose of an altitude valve on an elevated tank is to

Back 24

Control maximum filling level in distribution storage.

Front 25

Moderately hard water will have a hardness range of ____ mg/l as calcium carbonate.

Back 25

61 to 120

Front 26

A common method for removing hydrogen sulfide from water is

Back 26

Aeration

Front 27

Lead in drinking water can result in

Back 27

Impaired mental functioning in children

Front 28

An average percentage range for unaccounted-for water in a fully metered system is

Back 28

11-15%

Front 29

When the pumping rate is increased, the effect on the cone of depression is to

Back 29

Lower the pumping level

Front 30

The presence of total coliforms in drinking water indicates

Back 30

The potential presence of pathogens

Front 31

The primary health risk associated with trihalomethanes (THMs) is

Back 31

Cancer

Front 32

The primary health risk associated with synthetic organic compounds (SOCs) is

Back 32

Cancer

Front 33

The primary source(s) of synthetic organic compound (SOC) contamination in water supplies is (are)

Back 33

Industrial solvents and agricultural pesticides

Front 34

The maximum contaminant level goal (MCLG) of known or probable carcinogens is

Back 34

Zero

Front 35

An objectionable feature of iron and manganese in water is

Back 35

Staining of fixtures

Front 36

High nitrate concentrations in water can affect

Back 36

Infants

Front 37

One indication of corrosive water is a high concentration of

Back 37

Carbon dioxide

Front 38

At the same barometric pressure. The amount of dissolved oxygen in cold water tends to be _____ the amount of dissolved oxygen in warm water.

Back 38

More than

Front 39

Which component of a centrifugal pump moves the water?

Back 39

Impeller

Front 40

A record containing the size, location, and ties of water mains; valves; hydrants; tanks; resovoirs; and pump stations is called a

Back 40

Comprehensive map

Front 41

The water table is defined as the?

Back 41

Upper surface of the groundwater

Front 42

The treatment process designed to kill pathogenic organisms is

Back 42

Disinfection

Front 43

The primary source of trihalomethanes (THMs) in drinking water is

Back 43

The reaction of chlorine compounds and organic matter

Front 44

What is the difference between maximum contaminant level (MCL) and a secondary maximum contaminant level (SMCL)?

Back 44

MCLS related to health effects, while SMCLs relate to aesthetic concerns

Front 45

The purpose of an electrical lock-out device is to

Back 45

Positively prevent the operation of an electrical curcuit

Front 46

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

Back 46

All of the above

Front 47

If the speed of centrifugal pump is increased, and the head remains the same, the gallons per minute output will?

Back 47

Increase

Front 48

When installing service lines, it is a good practice to provide for movement due to soil settling by installing which of the following?

A. Bend or gooseneck in the pipe

B. expansion joint

C. Flexible coupling

D. Service line on the side of the pipe

Back 48

Bend or gooseneck in the pipe

Front 49

Disc-type meters are classified as ______ meters.

Back 49

Positive-displacement

Front 50

A major break In a water main can assist the distribution operator to.

A. Determine the effectiveness of the systems thrust blocks

B. Rid the system of air pockets

C. Observe the interior condition of the distribution system's piping.

D. Determine if additional fire hydrants are needed

Back 50

Observe the interior condition of the distribution system's piping

Front 51

The rated flow of a water meter, as stated by the manufacturer, is based on ______ flow.

Back 51

Continous

Front 52

If water flowing in a 6 inch diameter pipe is discharged into a 4inch diameter pipe the velocity will?

Back 52

Increase approximately twice

Front 53

Which of the following safe drinking water act (SDWA) rules provides for action levels instead of maximum containment levels (MCLs)?

A. Volatile organic chemicals

B. Total coliforms

C. Lead and copper

D. Surface water treatment

Back 53

Lead and copper

Front 54

Hydrostatic pressure testing is the process used to test

Back 54

Leakage in the pipe

Front 55

Water leaking to the surface after operating an old valve probably is caused by

Back 55

Dried out packing

Front 56

To repack a buried Gate valve, the valve must be

Back 56

Fully open

Front 57

Centrifugal pump parts include

A. Diaphragm

B. Piston

C. Rotor

D. Volute

Back 57

Volute

Front 58

In making a household service connection, the employee finds the 8-inch water main wall is too thin and has to use a ______ to complete the installation.

Back 58

Service clamp

Front 59

Maintenance and inspection program for storage tanks and reservoirs is performed

Back 59

Every other year

Front 60

The term" maximum containment level goal (MCLG)" means the

Back 60

Level of a contaminant in drinking water below which there are no known or suspected adverse health effects with a margin of safety

Front 61

What flow can be expected from a standard 5/8 inch by 3/4 inch meter?

Back 61

20 gallons per minute

Front 62

The difference between tier 1 and tier 2 violations is

Back 62

Tier 1 violations potentially impose direct and adverse health effects; Tier 2 violations do not pose a direct threat to public health.

Front 63

Maintenance required of bubbler tube level indicators include checking the

Back 63

Air tube

Front 64

A device used to check flows Ina distribution system is called a

Back 64

Pilot gauge

Front 65

Which of the following would be classified as a positive displacement pump?

A. Centrifugal pump

B. Jet pump

C. Propeller pump

D. Reciprocating pump

Back 65

Reciprocating pump

Front 66

Water with high turbidity will also have a high concentration of

Back 66

Fine suspended materials

Front 67

A characterteristic that distinguishes a strong acid from a weak acid is the

Back 67

Degree of ionization

Front 68

Final determination of vulnerability is made by

Back 68

The primacy agency

Front 69

When a water main repair can be made with a repair clamp and the main is under continuous pressure, the concern for _____ is reduced.

Back 69

Thorough flushing

Front 70

If solids in water have an average specific gravity of 1.20, they are

Back 70

20% heavier than water

Front 71

Static head is the

Back 71

Pressure due to the depth or elevation of water

Front 72

The lead and copper rule specifies that all public water systems (PWSs) must initially monitor for lead content by collecting samples from

Back 72

Point of entry to the distribution system

Front 73

The Safe Drinking Water Act requires ________ to develop a comprehensive coliform monitoring system.

Back 73

All public water systems

Front 74

Wear rings are installed in a pump to

Back 74

Minimize internal water leakage

Front 75

Daily consumption of gaseous chlorine may be checked by

Back 75

A platform scale

Front 76

The discharge rate of a piston-type pump

Back 76

Is constant at a constant speed

Front 77

If an initial sample is positive for total coliforms and a repeat sample is positive for fecal coliform or E. Coliform. Notice to the public must be given by broadcast media (television and radio) within?

Back 77

72hours

Front 78

Which of the following chemicals will most likely keep iron in suspension?

A. Chlorine

B. Fluoride

C. Polyphosphate

D. Lime

Back 78

Polyphosphate

Front 79

A primary health risk associated with microorganisms in drinking water is?

Back 79

Acute gastrointestinal diseases

Front 80

The granular filtration process is designed to reduce?

Back 80

Turbidity

Front 81

A primary source of volatile organic chemical (VOC) contamination of water supplies is

Back 81

Industrial solvents

Front 82

After 5 years use, a portion of cast iron pipe shows a white scale about 1/2 thick lining the inside. This means?

Back 82

The water is chemically unstable and is depositing

Front 83

When calcium hypochlorite is used for disinfecting a water supply, it should be

Back 83

Dissolved in water, allowed to settle, and the supernatant siphoned off and fed into the water system.

Front 84

Aeration in water treatment plants is used to

Back 84

Reduce concentrations of dissolved gases

Front 85

What can the operator do if iron fouling appears to be a problem in an ion exchange softner?

Back 85

Increase backwash flow rates

Front 86

The peak capacity of water mains is often reduced by

Back 86

Tuberculation

Front 87

The term "maximum contaminant level goal (MCLG)" means the

Back 87

The level of a contaminant in drinking water below which there are no known or suspected adverse health effects with a margin of safety

Front 88

Which of the following elements does ion exchange softening increase in the finished water?

A. Calcium

B. Magnesium

C. Manganese

D. Sodium

Back 88

Sodium

Front 89

When compared to a 1-million gallon resovoir at the same water elevation, how much pressure in the mains will a 100,000 gallon Reservoir develop?

Back 89

The same

Front 90

A granular, white, dry powder used in disinfection is?

Back 90

Calcium hypochlorite

Front 91

Which of the following pH ranges would deposit a thin film of calcium carbonate on the inside surface of a pipe?

A. 2.0 - 3.0

B. 4.0 - 5.0

C. 6.0 - 7.0

D. 8.0 - 9.0

Back 91

8.0 - 9.0

Front 92

Chlorine demand is satisfied at the point when

Back 92

The reaction of chlorine with organic and inorganic materials stops

Front 93

What is the most common method used in labs to test for total coliform E. Coliform?

A. DMA

B. Green

C. Colilert

D. Lamp

Back 93

Colilert

Front 94

Which of the following is the principle constituent in water that causes corrosion of metals?

A. Alkalinity

B. Dissolved oxygen

C. Hydrogen sulfide

D. Sodium chloride

Back 94

Dissolved oxygen

Front 95

Normally, surface water and groundwater have a pH range of

A. 9.0-10.5

B. 6.8-8.5

C. 1.5-4.0

D. None of the above

Back 95

6.8-8.5

Front 96

Hardness in water is caused by

A. Alum

B. Calcium and magnesium

C. Chloride and fluoride

D. Sodium and potassium

Back 96

Calcium and magnesium

Front 97

The lead and copper rule specifies that all public water systems (PWS) must initially monitor for lead content by collecting samples fromA. High risk residencesB. Point of entry (POE) to the distribution system

The lead and copper rule specifies that all public water systems (PWS) must initially monitor for lead content by collecting samples fromA. High risk residencesB. Point of entry (POE) to the distribution systemC. Raw water entering the treatment facility

The lead and copper rule specifies that all public water systems (PWS) must initially monitor for lead content by collecting samples fromA. High risk residencesB. Point of entry (POE) to the distribution systemC. Raw water entering the treatment facility

C. Raw water entering the treatment facility

Back 97

High risk residences

Front 98

The static head is the

A. Energy of motion of the water

B. Pressure loss in the line due to friction

C. Pressure due to the depth or elevation of water

D. Sum of all three of the above

Back 98

Pressure due to depth or elevation of water

Front 99

When a water main repair can be made with a repair clamp and the main is under continous pressure, the concern for _______ is reduced.

A. Disinfecting

B. Thorough flushing

C. Alerting the health department

D. Fluoridating

Back 99

Disinfecting

Front 100

The aeration process tends to decrease all of the following except

A. Carbon dioxide

B. Dissolved oxygen

C. Hydrogen sulfide

D. Volatile organic compounds

Back 100

Dissolved oxygen

Front 101

Which form of iron is most soluble in water?

Back 101

Ferrous (Fe+2)

Front 102

As long as the temperature is steady, the pressure indicator on a chlorine cylinder will _______ until all the chlorine has been gasified.

Back 102

Remain steady

Front 103

Because chlorine residual is related to the pH of the water. It may be said that

A. A higher pH requires a higher chlorine residual

B. A higher pH requires a lower chlorine residual

C. A lower pH requires a higher chlorine residual

D. A lower pH has no effect on chlorine residual

Back 103

A higher pH requires higher chlorine residual

Front 104

Using the approximate atomic weights of calcium = 40, oxygen = 16, hydrogen = 1, calculate the molecular weight of calcium hydroxide (ca(OH)2.

Back 104

74

Front 105

Chlorine reacts with nitrogenous compounds to form

Back 105

Chloramines

Front 106

If disinfection is incomplete because the chlorine residual is in the hypochlorite ion form, what should you change to improve disinfection?

A. Calcium

B. Hardness

C. pH

D. Total alkalinity

Back 106

pH

Front 107

For public water systems using surface water and groundwater under the influence of surface water, turbidity must be measured at least

Back 107

Every four hours

Front 108

The word "normal" associated with a reagent refers to the

A. Gram equivalent weight of the reagent chemical per litre of solution

B. Molecular weight of the reagent

C. Grams of solute per litre of solvent

D. Gram equivalent weight of reagent chemical per litre of solute

Back 108

Gram equivalent weight of the reagent chemical per litre of solution

Front 109

A well screen must be installed in

A. All deep wells

B. Consolidated materials

C. Only shallow wells

D. Unconsolidated materials

Back 109

Unconsolidated materials

Front 110

The chlorine gas feed rate is usually controlled by adjusting the

A. Water flow to the injector

B. Valve on the chlorine cylinder

C. Pressure in the chlorine cylinder

D. Rotameter control valve

Back 110

Rotameter control valve

Front 111

A motor drawing 4 amp at 440 DC volts uses

A. 110 watts

B. 440 watts

C. 880 watts

D. 1,760 watts

Back 111

D. 1,760 watts (4×440=1,760)

Front 112

Which of the following can cause tastes and odors in a water supply?

A. Dissolved zinc

B. Algae

C. High pH

D. Low pH

Back 112

Algae

Front 113

The most important factor to consider in locating a well site from the health point of view is

Back 113

Vulnerability

Front 114

The primary purpose of pressure-reducing valves between water system pressure zones is to

Back 114

Reduce downstream pressure

Front 115

A well is acidized in order to

Back 115

Increase yield

Front 116

An acceptable means of corrosion control for relatively small systems is

A. Activated carbon

B. Lime soda ash softening

C. pH control

D. Zeolite softening

Back 116

pH control

Front 117

If volatile organic chemicals (VOCs) are detected, sampling must then be conducted

A. Monthly

B. Quarterly

C. Biannually

D. Annually

Back 117

Quarterly

Front 118

Clarification of water by sedimentation and filtration removes

A. Dissolved solids

B. Suspended solids

C. Volatile solids

D. All of the above

Back 118

Suspended solids

Front 119

A violationof the maximumcontaminant level (MCL) for total trihalomethanes occurs when

Back 119

The running average of quarterly samples during the previous 12 months exceeds for MCL

Front 120

Which Is the correct order of regeneration of a zeolite softening unit after it has been removed from service?

Back 120

Backwash, brine, rinse, and return to service

Front 121

Two pumps of the same flow capacity and pressure rating that are piped in series would result in

A. Heating of the pumps

B. Double the flow rate, same head

C. Double the flow and head

D. Double the head

Back 121

Double the head

Front 122

Which of the following elements causes hardness in water?

A. Sodium and potassium

B. Nitrogen and sulfur

C. Fluoride and oxygen

D. Calcium and magnesium

Back 122

Calcium and magnesium

Front 123

If raw water turbidity changed from 10 to 300 turbidity units and the finished water turbidity had increased from 0.1 to 1.0 turbidity units, the unit process having the most impact to correct this situation is

A. Coagulation

B. Sedimentation

C. Filtration

D. Disinfection

Back 123

Coagulation

Front 124

The granular filtration process is designed to reduce

A calcium and magnesium sulfates

B. True color

C. Total dissolved solids

D. Turbidity

Back 124

Turbidity

Front 125

To protect stored water from contamination, a ground storage Reservoir should

A. Be totally ir tight

B. Have both the overflow piping and the vent screened

C. Have cathodic protection

D. Have its interior surface coated with an AWWA approved paint system

Back 125

Have both the overflow piping and the vent screened

Front 126

When compared to a 1-million gallon resvoir at the same water elevation, how much pressure in the mains will a 100,000 gallon Reservoir develop?

A. Exactly one tenth as much pressure

B. Less

C. More

D. The same

Back 126

The same

Front 127

Flammable liquids are those that have flash points

Back 127

Below 100°F

Front 128

Material safety data sheet are required for

A. All chemicals used in the workplace regardless of hazard.

B. Only chemicals with known or suspected health hazards

C. Only flammable or explosive chemicals

D. Both b and c

Back 128

All chemicals used in workplace regardless of hazard

Front 129

Under the Safe Drinking Water Act, "lead free" means

A. Absolutely no lead content in solder or pipes/fixtures

B. Up to 8% lead content in pipes/fixtures and solder

C. Up to 8% lead content in pipes/fixtures and 0.2% lead content in solder

D. Any amount of lead content in pipes/fixtures and solder provided the existence of an impermeable coating to prevent lead leaching

Back 129

Up to 8% lead content in pipes/fixtures and 0.2% lead content in solder

Front 130

The least amount of 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 130

Gate valve

Front 131

A method used to soften water is

A. Aeration

B. Sedimentation

C. Ion exchange

D. Adsorption

Back 131

Ion exchange

Front 132

The maximum contaminant level for trihalomethanes is?

Back 132

0.10mg/L

Front 133

According to the lead and copper rule. The action level for the 90th percentIle lead level is

Back 133

0.015mg/L

Front 134

What size bubbles does aeration create?

Back 134

Smaller size bubbles

Front 135

Which valve is most suitable for a throttling application?

A. Butterfly

B. Check

C. Gate

D. Tapping

Back 135

Butterfly