W1 ~ Water Distribution {Mick ~Mick}

Front 1

A customer complaint about the presence of brown floc in tap water can best be handled by

Back 1

investigating the problem as soon as possible.

Front 2

The term "aquifer" relates to which one of the following?

surface water

lake

stream

groundwater

Back 2

Groundwater

Front 3

One indication of corrosive water is a high concentration of

Back 3

carbon dioxide

Front 4

Cathodic protection means protection against

Back 4

corrosion

Front 5

The component parts of a well include all of the following except

A. sanitary seal

B. well screen

C. pressure switch

D. cement grout

Back 5

C. pressure switch

Front 6

A device used to check flow in a distribution system is called a

Back 6

pitot guage

Front 7

A ------- pump is classified as a positive displacement pump

Back 7

reciprocating

Front 8

The pH of water may be reduced by adding

Back 8

carbon dioxide

Front 9

Proper alignment between two shafts can be checked using a

Back 9

straight edge and feeler guage

Front 10

Two fundamental treatment requirements for public water systems using surface water sources are

Back 10

disinfection and filtration

Front 11

For household use, what size of displacement meter is best ?

Back 11

5/8 to 2 inches

Front 12

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 12

disinfecting

Front 13

Static head is the

Back 13

pressure due to the depth or elevation of water

Front 14

Which component of a centrifugal pump moves the water?

Back 14

Impeller

Front 15

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

Back 15

comprehensive map

Front 16

What term describes water that is suitable for drinking ?

Back 16

potable

Front 17

Velocity of flow in mains is usually expressed in terms of

Back 17

feet per second

Front 18

A "competent person " at an excavation work site

Back 18

is capable of identifying hazards and has the authority to take corrective measures

Front 19

An approved device used to prevent backflow and backsiphonage is a

Back 19

vacuum breaker

Front 20

The performance curve of a pump reflects

Back 20

pump capacity, efficiency, horsepower

Front 21

A vacuum is formed in the chlorinator by the

Back 21

pressure differential through the ejector

Front 22

Cavitation in pumps is caused by pumping

Back 22

flow rates considerably higher than design flows

Front 23

As water temperatures decrease, the disinfecting action of chlorine

Back 23

decreases.

Front 24

One method of minimizing water hammer is to

Back 24

install a surge tank

Front 25

The metal strip in an electrical fuse will melt from the heat caused by

Back 25

high amperage demands

Front 26

The principal purpose of an altitude valve elevated tank is to

Back 26

Control maximum filling level in distribution storage

Front 27

The treatment process designed to kill pathogenic organisms is

A. disinfection

B. oxidation

C. pasteurization

D. sterilization

Back 27

Disinfection

Front 28

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

Back 28

11 to 15%

Front 29

Backsiphonage is caused by

Back 29

Partial vacuum in the line

Front 30

The primary origin of coliform in Water Supplies is

Back 30

Fecal contamination by warm-blooded animals

Front 31

Hardness in water is caused by

Back 31

Calcium and magnesium

Front 32

High nitrate concentrations in water can affect

Back 32

Infants

Front 33

A major break in the water main can assist the distribution Operator to

Back 33

Observe the interior condition of the Distribution Systems piping

Front 34

An illness in infants known as methemoglobinemia is attributed to

Back 34

High nitrate content in the water

Front 35

Hydrostatic pressure testing is the process used to test

Back 35

Leakage in the pipe

Front 36

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

Back 36

Dried out packing

Front 37

Water hammer is most likely caused by

Back 37

Closing a valve too fast

Front 38

To repack a buried gate valve, the valve must be

Back 38

Fully open

Front 39

Cavitation in pumps is caused by pumping

Back 39

Flow rates considerably higher than design flow

Front 40

For household use what size of displacement meet is best

Back 40

5/8 - 2 inches

Front 41

The difference between the static ground groundwater level and the pumping level is the

Back 41

Drawdown

Front 42

The primary reason for the use of a dry Barrel fire hydrant is to

Back 42

Keep the hydrant from freezing

Front 43

The component parts of a well include all of the following except

A - sanitary seal

B - well screen

C - pressure switch

D - Cement Grout

Back 43

Pressure Switch

Front 44

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 44

More than

Front 45

Which of the following is the principal constituents in water that causes corrosion of metals

A. alkalinity

B. dissolved oxygen

C. hydrogen sulfide

D. sodium chloride

Back 45

B. Dissolved oxygen

Front 46

Which component of a centrifical pump moves the water

Back 46

impeller

Front 47

A record containing the size, location, and ties of water mains, valve, hydrant, tanks, Reservoir, and pump stations is called a

Back 47

Comprehensive map

Front 48

What term describes water that is suitable for drinking

Back 48

Potable

Front 49

Check valves are used to

Back 49

Permit flow in Only One Direction

Front 50

The water table is defined as the

Back 50

Upper surface of the groundwater

Front 51

A coupon test installation in a distribution system is used to

Back 51

Determine the rate of scaling or corrosion

Front 52

A common method for removing hydrogen sulfide from water in

Back 52

Aeration

Front 53

Lead in drinking water can result in

Back 53

Impaired mental functioning in children

Front 54

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

Back 54

Lower the pumping level

Front 55

Backsiphonage is caused by

Back 55

Partial vacuum in the line

Front 56

The primary origin of coliforms in Water Supplies is

Back 56

Fecal contamination by warm- blooded animals

Front 57

The presence of total coliforms in drinking water indicates

Back 57

the potential presence of pathogens.

Front 58

The primary source of trihalomethanes (THM's) in drinking water is

Back 58

The reaction of chlorine compounds and organic matter

Front 59

An air gap device is used to

Back 59

Prevent backflow of non-potable water into a drinking water supply

Front 60

The abbreviation D.O stands for

Back 60

Dissolved oxygen

Front 61

A corporation stop is used to

Back 61

Connect the service line to the water main under pressure

Front 62

High nitrate concentrations in water can affect

Back 62

Infants

Front 63

Sodium hypochlorite is

Back 63

A compound that can be purchased in liquid solution and can be used for disinfection

Front 64

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

A. bend or goose neck in the pipe

B. expansion Joint

C. flexible coupling

D. service line on the side of the pipe

Back 64

A. Bend or gooseneck in the pipe

Front 65

Enterprise device used to prevent backflow and backsiphonage is a

Back 65

Vacuum breaker

Front 66

The difference between the static ground water level and the pumping level is the

Back 66

Drawdown

Front 67

A customer complained about the presence of brown FLOC in tap water can best be handled by

Back 67

Investigating the problem as soon as possible

Front 68

The term "aquifer" relates to which of the following

- Surface water

- Lake

- stream

- groundwater

Back 68

Groundwater

Front 69

One indication of corrosive water is a high concentration of

Back 69

Carbon dioxide

Front 70

Cathodic protection means protection against

Back 70

Corrosion

Front 71

The primary reason for the use of a dry Barrel fire hydrant is to

Back 71

Keep the hydrant from freezing

Front 72

The component parts of a well include all of the following except

✏sanitary seal

✏Well Screen

✏pressure switch

✏cement grout

Back 72

Pressure switch

Front 73

At the same barometric pressure the amount of dissolved oxygen and cold water tends to be__________ the amount of dissolved oxygen in warm water

Back 73

More than

Front 74

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

✒ alkalinity

✒ dissolved oxygen

✒ hydrogen sulfide

✒ sodium chloride

Back 74

Dissolved oxygen

Front 75

Which component of a centrifical pump moves the water

Back 75

impeller

Front 76

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

Back 76

Comprehensive map

Front 77

What term describes water that is suitable for drinking

Back 77

Potable

Front 78

Velocity of flow in mains is usually expressed in terms of

Back 78

Feet per second

Front 79

A "competent person" at excavation work site

Back 79

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

Front 80

Hydrogen sulfide gas smells like

Back 80

Rotten eggs

Front 81

Which of the following methods can be used to remove high iron content from a well Supply?

☺ oxidation and filtration

☺ aerate it with carbon dioxide

☺ decreased flow

☺ retain until it settles out

Back 81

Oxidation and filtration

Front 82

Hardness may be expressed in

Back 82

Milligrams per litre as CaCO3

Front 83

The basic unit of electrical power is the

Back 83

Watt

Front 84

Check valves are used to

Back 84

Permit flow in Only One Direction

Front 85

Standard pumper - connection fire hydrants should not be installed on water mains smaller than _____ inches in diameter

Back 85

6 inches

Front 86

Beards or long sideburns prohibit an operator from safely

Back 86

Wearing the face mask of a self-contained breathing apparatus

Front 87

The water table is defined as the

Back 87

Upper surface of the groundwater

Front 88

The shaft speed of an electric motor is most commonly expressed in units of

Back 88

Revolutions per minute: RPM

Front 89

A coupon test installation in the distribution system is used to

Back 89

Determine the rate of scaling or corrosion

Front 90

Disease causing bacteria are known as

Back 90

Pathogenic

Front 91

Normally surface water and groundwater have a PH range of

Back 91

6.8 - 8.5

Front 92

Which is the best definition of turbity in water

🔦anything in water that scatters light space

🔦 sequestered iron and manganese particles

🔦 the amount of dissolved material in water

🔦 the combined Optical effect of pH, chlorine, and color

Back 92

Anything it would have that scatters light

Front 93

A "competent person" must inspect evacuations in adjacent areas for hazards

Back 93

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

Front 94

The component of a centrifical pump sometimes installed on the end of a suction pipe to hold the priming is known as a

Back 94

Foot valve

Front 95

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

Back 95

Control maximum control maximum filling level in distribution storage

Front 96

The term "Primacy" means the

Back 96

Primary Authority for implementation and enforcement of drinking water regulations

Front 97

Reciprocating positive displacement pumps are also known as

Back 97

Piston Pumps

Front 98

Moderately hard water will have a hardness range of _______ mg/L as calcium carbonate

Back 98

61 to 120

Front 99

A common method for removing hydrogen sulfide from water is

Back 99

Aeration

Front 100

The treatment process designed to kill pathogenic organisms is

Back 100

Disinfection

Front 101

Lead in drinking water can result in

Back 101

Impaired mental functioning in children

Front 102

A disease that might be transferred to a new victim through water is

Back 102

Typhoid

Front 103

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

Back 103

11 to 15%

Front 104

A cross connection is defined as a connection between

Back 104

A potable water system and non-potable water system

Front 105

Backsiphonage is caused by

Back 105

Partial vacuum in the line

Front 106

5 milligrams liter equals ______ parts per million

Back 106

5.0

Front 107

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

Back 107

Lower the pumping level

Front 108

Which chemical is most often used to disinfect Public Water Supplies

Back 108

Chlorine or chlorine compounds

Front 109

The purpose of a surge tank is to

Back 109

Control water hammer

Front 110

The presence of total coliforms in drinking water indicates

Back 110

The potential presence of pathogens

Front 111

The term MCL means

Back 111

Maximum containment level

Front 112

The primary origin of coliform in Water Supplies is

Back 112

Fecal contamination by warm-blooded animals

Front 113

The primary source of trihalomethanes THM's in drinking water is

Back 113

The reaction of chlorine compounds and organic matter

Front 114

An air gap device is used to

Back 114

Prevent backflow of non-potable water into a drinking water supply

Front 115

The primary health risk associated with trihalomethanes (THM's) is

Back 115

Cancer

Front 116

The purpose of the fusible plug on a chlorine tank is to

Back 116

Prevent the cylinder from exploding at high temperatures

Front 117

The primary health risk associated with synthetic organic compound SOC's is

Back 117

Cancer

Front 118

The most common accurate statement concerning potable water lines is

Back 118

They must never be connected to a contaminated water source

Front 119

The primary source(s) of synthetic organic compounds (SOC) contamination in water supply is (arel

Back 119

Industrial solvents and agricultural pesticides

Front 120

Water samples are analyzed for the coliform group of bacteria because these bacteria

Back 120

Indicate the possible presence of disease-causing organisms

Front 121

Lead in drinking water is primarily the result of

Back 121

Corrosion with the distribution system in Residential Plumbing

Front 122

Pressure in a pipeline may be affected by

Back 122

Friction and elevation

Front 123

What is the difference between a maximum containment level MCL and a secondary maximum containment level SMCL ?

Back 123

MCL relate to health effects while SMC L's relate to add aesthetic concerns

Front 124

The purpose of an electrical lockout device is to

Back 124

Positively prevent the operation of an electrical circuit

Front 125

The maximum containment level goal of known or probable carcinogens is

Back 125

Zero

Front 126

A public water system must comply with Safe Drinking Water Act sdwa regulations based on

Back 126

Population range, size of community, and financial ability

Front 127

An objectionable feature of iron and manganese in water is

Back 127

Staining of fixtures

Front 128

The pressure that a pump must pray against is measured in

Back 128

Pounds per square inch

Front 129

If the speed of a centrifical pump is increased and the head Remains the Same, the gallons per minute output will

Back 129

Increase

Front 130

A suspension of very minor particles that cause an appearance of cloudiness is called

Back 130

Turbidity

Front 131

Hardness in water is caused by

Back 131

Calcium and magnesium

Front 132

Contaminant monitoring requirements can depend on

Back 132

Previous violations of Maximum contaminant levels, the results of a vulnerability assessment, the size of the water system

Front 133

Sodium hypochlorite is

Back 133

A compound that can be purchased in liquid solution and can be used for disinfection

Front 134

The abbreviation capital DO stands for

Back 134

Dissolved oxygen

Front 135

High nitrate concentrations in water can affect

Back 135

Infants

Front 136

A corporation stop is used to

Back 136

Connect the service line to the water main under pressure

Front 137

When installing service lines, it is a good practice to provide for movement due to slow Your settlement by installing

Back 137

Bend gooseneck in the pipe

Front 138

The metal strip in the electrical fuse will melt from the heat caused by

Back 138

High amperage demands

Front 139

A trench must be short if it is________ feet deep or deeper

Back 139

5

Front 140

An approved device used to prevent backflow and backsiphonage is a

Back 140

Vacuum breaker

Front 141

Disc-type meters are classified as ______ meters

Back 141

positive-displacement

Front 142

The performance curve of a pump reflects

Back 142

Pump capacity, pump efficiency, pump horsepower

Front 143

If the pump bearings on horizontal centrifical pumps are over lubricated, the most important effect is that the extra lubricant

Back 143

May cause overheating and possible failure of the bearing

Front 144

Flexible coupling used to connect the modor and the pump shaft transmit

Back 144

power efficiently and effectively from one shaft to the other

Front 145

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

Back 145

Observe the interior condition of the Distribution Systems piping

Front 146

A portable ladder must extend ______ feet above the upper surface of an excavated Trench

Back 146

3

Front 147

Vacuum is formed in the chlorinator by the

Back 147

Pressure differential to the ejector

Front 148

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

Back 148

Continuous

Front 149

When the switch that has been tagged and locked out, the one warning tag must have

Back 149

Name and signature of person who locked out the switch

Front 150

In general, a pH of treated water below 6.5 indicates

Back 150

Corrosive water

Front 151

When comparing friction loss in various types of pumps, a larger Hazen - Williams C value indicates the pipe

Back 151

Is smoother inside

Front 152

Generally a valve exercising program recommends valves to be exercised

Back 152

Once every year

Front 153

If water flowing in a 6 inch diameter pipe is discharged in a 4-inch diameter pipe, the velocity will

Back 153

Increase approximately twice

Front 154

Imagine this level of about 0.2 mg/L can result in

Back 154

Staining of toilet fixtures in laundry

Front 155

Which of the following Safe Drinking Water Act rules provides for Action levels instead of Maximum containment levels

Back 155

Lead and Copper

Front 156

The most widely used type of prime mover and a pumping station is a

Back 156

Electric motor

Front 157

An illness in infants known as methemoglobinemia is attributed to

Back 157

high nitrate content in the water.

Front 158

Hydrostatic pressure testing is the process used to test

Back 158

leakage in the pipe

Front 159

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

Back 159

Dried out packing

Front 160

Water hammer is most likely caused by

Back 160

closing a valve too fast

Front 161

Too repack a buried gate valve, the valve must be

Back 161

fully open

Front 162

Centifrigual pump parts include

Back 162

voulte

Front 163

Thrust blocks are installed to

Back 163

prevent movements of pipes

Front 164

In order to comply with safely regulations, all couplings on pumps must be

Back 164

guarded

Front 165

It is essential to ventilate a valve vault before entry in order to

Back 165

remove dangerous gases and / or ensure proper oxygen levels.

Front 166

According to the Safe Drinking Water Act, bacteriological samples should be collected at

Back 166

Representative points in a distribution system

Front 167

A noisy and vibrating gate valve indicates

Back 167

Cavitation is happening

Front 168

How often should a sealed Ball Bearing in electrical motor be lubricated

Back 168

Never

Front 169

A maintenance and inspection program for storage tanks and reservoirs is performed

Back 169

Every other year

Front 170

A device used to check fluids in distribution system is called a

Back 170

Pitot gauge

Front 171

Which of the following would be classified as a positive displacement pump what's the traffic report, jet pump, propeller pump, or reciprocating pump

Back 171

Reciprocating pump

Front 172

Maintenance required of bubbler to level indicators include checking the

Back 172

Air tube

Front 173

I'm making a whole school service connection to employ you find states where the main wall is too thin and has to use a______ to complete the installation

Back 173

service clamp

Front 174

Water hammer can be minimized by

Back 174

Air release valve and surge tanks

Front 175

What pump would be classified as a positive displacement pump

Back 175

Reciprocating pump

Front 176

For household use, what size of displacement meter is best

Back 176

5/8 - 2 inches

Front 177

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

A. radius

B. drawdown

C cone of depression

D. watershed

Back 177

B. drawdown