Rual Water Treatment/distribution Grade1 & 2

Front 1

Which organism are responsible for organic taste and odors?

Back 1

Algae (mossy/fishy-odor)

Front 2

Which chemicals create inorganic taste and odors?

Back 2

Iron & manganese

Front 3

Which chemical is responsible for rotten egg odor?

Back 3

Hydrogen sulfide (H2S)

Front 4

What causes color in surface water supplies?

Back 4

Organic compounds from decaying vegetation

Front 5

What is GAC?

Back 5

Granulated activated carbon

Front 6

What is the best way to remove organic tastes and odors?

Back 6

Activated carbon

Front 7

What types and odors can be removed by aeration?

Back 7

Iron & Hydrogen Sulfide

Front 8

Which kinds of algae cause most of the organic tastes and odors?

Back 8

Blue-green Algae (fishy odor)

Front 9

What chemical can be used to kill algae in a lake?

Back 9

Copper Sulfate

Front 10

Where should activated carbon be added in a surface water treatment plant?

Back 10

As far up stream as possible

Front 11

What is a coagulant chemical used for?

Back 11

To bring negatively charged turbidity particles together

Front 12

What is hydraulic shear in a flocculator ?

Back 12

When a mixer moving to fast “cuts” floc into pieces

Front 13

How do colder temperatures affect coagulation and flocculation ?

Back 13

Coagulation = +detention time

Flocculation = Pin floc

Front 14

Where does rapid mixing occur in a surface water treatment plant ?

Back 14

At the head of the plant/intake

Front 15

Which two chemicals are commonly used to remove turbidity?

Back 15

Aluminum sulfate (alum/lime)

Front 16

List three substances that would be considered to be coagulant aids ?

Back 16

Alum,ferric,ferrous/sulfate ferric chloride

Front 17

Which insoluble form of aluminum precipitates as a floc particle?

Back 17

Alum (which forms) aluminum hydroxide

Front 18

What is the detention time for a rapid mixer ?

Back 18

1-3 minutes velocity of 5-7 FPS

Front 19

What type of polymer will attract negatively charged turbidity particles?

Back 19

Catatonic polymers

Front 20

What is the pH range for alum precipitation ?

Back 20

5.5 - 6.5 range

Front 21

What happens to the pH when iron and aluminum salts are added to the water?

Back 21

Forms aluminum hydroxide which raises pH

Front 22

What is the PH range for precipitation of color ?

Back 22

3.5 - 5.5

Front 23

What color is associated with manganese problems ?

Back 23

Black

Front 24

Red water problems occur when iron concentration exceeds _____mg/l

Back 24

.03 mg/l

Front 25

What other treatment process is required if iron is removed by aeration?

Back 25

Sedimentation tanks (to settle out)

Front 26

What is a sequestering agent?

Back 26

Surround ions and keep them in solution

Front 27

What is the common name of the chemical used to sequester iron?

Back 27

Polyphosphates and sodium hexametaphoshate

known as Calgon

Front 28

Why are baffles important in a sedimentation basin?

Back 28

Prevent short circuiting

Front 29

What is the detention time for a sedimentation basin?

Back 29

4 - 6 hours

Front 30

What is the notched plate used to remove water from the basin called ?

Back 30

V notch weir

Front 31

What can happen when sludge is not removed often enough?

Back 31

Bulking

(sludge becomes septic and floats to top)

Front 32

Why is the weir overoverflow rate important ?

Back 32

Determines how many gallons pass over each foot/day

Front 33

What type of device protects the sludge removal equipment in a sedimentation basin ?

Back 33

Shear pin

Front 34

What type of device protects the sludge removal equipment in a sedimentation basin ?

Back 34

Shear pin

Front 35

An up-flow clarifier will contain which of the conventional treatment processes?

Back 35

Coagulation, flocculation and sedimentation

Front 36

Pin floc leaving a sedimentation basin may indicate a problem with which part of the process?

Back 36

Flocculation basin (cold temp)

Front 37

What are the three kinds of gravity filters?

Back 37

Slow sand,rapid sand,and high rate

Front 38

What is the primary function of the filter underdrain?

Back 38

Evenly distribute the backwash

Front 39

What is the primary function of the filter underdrain?

Back 39

Evenly distribute the backwash

Front 40

What does loss of head mean in a filter?

Back 40

Indicates the filter is in need of backwashing

Front 41

What is the primary function of the filter underdrain?

Back 41

Evenly distribute the backwash

Front 42

What does loss of head mean in a filter?

Back 42

Indicates the filter is in need of backwashing

Front 43

What is freeboard in a filter?

Back 43

Area 24 - 28 inches above filter media to prevent media lost

Front 44

What is the primary function of the filter underdrain?

Back 44

Evenly distribute the backwash

Front 45

What does loss of head mean in a filter?

Back 45

Indicates the filter is in need of backwashing

Front 46

What is freeboard in a filter?

Back 46

Area 24 - 28 inches above filter media to prevent media lost

Front 47

Which two chemicals are used for turbidity removal ?

Back 47

Alum and lime

Front 48

True or False

Hardness compounds become insoluble at a high pH.

Back 48

False

Front 49

Which of the following is considered to be a coagulant aid for turbidity removal?

Back 49

A. Lime

B. Polymer

C. Bentonite clay

D. All of the above

Answer - D all of the above

Front 50

Alum works best when the pH is

Back 50

6.5 - 7.0

Front 51

Alum works best when the pH is

Back 51

6.5 - 7.0

Front 52

Powder activated carbon

IS NOT:

Back 52

A. Expensive

B. Difficult to handle

C. Used for turbidity removal

D. Potentially explosive

Answer- C used for turbidity removal

Front 53

All kinds of tastes and odors can be removed using?

Back 53

Activated carbon

Front 54

All kinds of tastes and odors can be removed using?

Back 54

Activated carbon

Front 55

Which two chemicals are used for non-carbonate softening ?

Back 55

Soda ash and caustic soda

Front 56

Carbonate hardness compounds become insoluble at what pH.

Back 56

9.0 - 10.5

Front 57

Which of the following is a coagulant aid for turbidity removal?

Back 57

Polymer

Front 58

Color can be removed by lowering the pH too.

Back 58

3.5 - 5.5

Front 59

Chemical precipitation of arsenic is accomplished using

Back 59

Ferric chloride

Front 60

Chemical precipitation of arsenic is accomplished using

Back 60

Ferric chloride

Front 61

Alum can be used to precipitate organic compounds at a pH of

Back 61

6.0

Front 62

Daily fluctuations in the pH in a Reservoir could mean

Back 62

Taste and odor problems coming

Front 63

Recarbonation is used to prevent

Back 63

Scaling in the distribution system

Front 64

The detention time in a coagulation basin should be

Back 64

1-3 minutes

Front 65

Sludge that rises to the surface of a sedimentation basin is caused by

Back 65

Not removing sludge often enough

Front 66

What should the detention be in a sedimentation basin

Back 66

4 - 6 hours

Front 67

What should the detention be in a sedimentation basin

Back 67

4 - 6 hours

Front 68

True or false

always add the coagulant aids first in the coagulation basin

Back 68

True

Front 69

The Langlier index is used for

Back 69

Corrosion control

Front 70

When collecting a distribution system sample or bacteriological testing, the person collecting the sample should allow the water to run ________ before filling the sample bottle.

Back 70

As long as necessary to permit clearing of the service line.

Front 71

When collecting a distribution system sample or bacteriological testing, the person collecting the sample should allow the water to run ________ before filling the sample bottle.

Back 71

As long as necessary to permit clearing of the service line.

Front 72

A chemical commonly used to raise pH is

Back 72

Lime

Front 73

Black stains on plumbing fixtures might be attributed to

Back 73

Manganese

Front 74

Black stains on plumbing fixtures might be attributed to

Back 74

Manganese

Front 75

1 kg equals _____ grams

Back 75

1000

Front 76

The indicator organisms used to determine contamination of drink of water are

Back 76

Coliform group

Front 77

The packing around the shaft of a centrifugal pump should be

Back 77

Tightened just enough to allow an occasional drop of liquid to escape

Front 78

1 pound per square inch of pressure will raise the water ___ft.

Back 78

2.31

Front 79

1 pound per square inch of pressure will raise the water ___ft.

Back 79

2.31

Front 80

Static head is defined as the

Back 80

Pressure due to depth or elevation of the water

Front 81

What is the volume of a settling tank 100 foot long 20 feet wide and 8 feet deep?

Back 81

Length x width x height = 20,000 cubic feet

100 x 25 x 8 =

Front 82

What is used to detect chlorine leaks ?

Back 82

10% solution of ammonia hydroxide

Front 83

The pressure gauge reading at the base of a tank filled to a depth of 1 feet is ____ psi

Back 83

0.433

Front 84

The multiple tube for fermentation test consist of three distinct tests. These tests, in the order performed, are the

Back 84

Presumptive, confirmed, and completed tests.

Front 85

Chlorine gas is

Back 85

Denser than air

Front 86

Polyphosphates maybe used in water treatment to retard corrosion and

Back 86

Calcium scale

Front 87

Polyphosphates maybe used in water treatment to retard corrosion and

Back 87

Calcium scale

Front 88

Calcium hypochlorite is formulated as a

Back 88

Powder

Front 89

Polyphosphates maybe used in water treatment to retard corrosion and

Back 89

Calcium scale

Front 90

Calcium hypochlorite is formulated as a

Back 90

Powder

Front 91

Chlorine leaks in metal container tend to

Back 91

Become larger

Front 92

Polyphosphates maybe used in water treatment to retard corrosion and

Back 92

Calcium scale

Front 93

Calcium hypochlorite is formulated as a

Back 93

Powder

Front 94

Chlorine leaks in metal container tend to

Back 94

Become larger

Front 95

Determining the pH of water is one of the important test of water quality. The results of the pH test indicate the

Back 95

Hydrogen ion activity

Front 96

Leakage from a packing gland should be approximately

Back 96

One drop per second

Front 97

Leakage from a packing gland should be approximately

Back 97

One drop per second

Front 98

A chlorine cylinder valve is thought to be leaking. If ammonia vapor is passed near the valve, the presence of a leak would be indicated by

Back 98

White smoke

Front 99

If a fire hydrant requires a nozzle pressure of 100 psi. What head of water must be used to supply it?

Back 99

Use Conversion table:

1 psi = 2.31 feet of water

2.31 x 100 = answer 231 ft

Hint 99

Thumb on water hose image

Front 100

A water main should be disinfected

Back 100

After the pipe is laid in place

Front 101

Carbon dioxide and water will

Back 101

Lower pH

Front 102

Pneumatic ejector lifts water from low points to higher levels. The device used to achieve this is a ?

Back 102

Air compressor

Front 103

Pressure is commonly measured in

Back 103

Pounds per square inch

Front 104

Mechanical seals are being installed in pumps because

Back 104

Packing requires an undesirable leakage that seals eliminate

Front 105

Which one of the following items must be replaced when connecting a new chlorine cylinder?

Back 105

Lead washer

Front 106

A major cause of pump and motor shaft coupling where is a

Back 106

Misalignment between pump and motor flanges

Front 107

Filters in a water treatment process are primarily for removing or reducing

Back 107

Turbidity

Front 108

The free chlorine residual in water is the amount of

Back 108

Uncombined chlorine that remains in the water after the chlorine has been applied and allowed to react

Front 109

The chemical name muriatic acid is

Back 109

Hydrochloric acid

Front 110

A chlorine residual in water can be determined by using the reagent

Back 110

DPD

diethyl-p-phenylenediamine

Front 111

The most important use of chlorine in water treatment is as a

Back 111

Disinfectant

Front 112

The difference between the amount of chlorine added to water and the amount of the residual chlorine remaining at the end of the specified contact. Is

Back 112

Chlorine demand

Front 113

Water that requires a large amount of soap to produce an acceptable lather is termed

Back 113

Hard

Front 114

Water that requires a large amount of soap to produce an acceptable lather is termed

Back 114

Hard

Front 115

A pump may be damaged if it is started with the discharge valve closed, if the pump is a

Back 115

Positive displacement pump

Front 116

Prepared water sample bottles use for collecting samples for bacteriological examination contain sodium thiosulfate crystals. It is important not to rinse out the sample bottle because the sodium thiosulfate

Back 116

Neutralizes any chlorine present in the sample

Front 117

Velocity of flow in water mains is usually expressed in terms of

Back 117

Feet per second

Front 118

A pH reading of 6.0 in raw water indicates the sample is

Back 118

Acid

Front 119

A grab sample represents

Back 119

The quality of water at the time the sample was taken

Front 120

The PH scale runs from

Back 120

0 - 14

Front 121

5 gallons of water weighs

Back 121

41.7 pounds

Straight conversion table

8.34 x 5 = 41.7

Front 122

What is a pH buffer used for?

Back 122

Neutralize acids and bases while maintaining a constant PH

Front 123

What would you be doing if you were reading a meniscus?

Back 123

Read the fluid level at the bottom of the meniscus

Front 124

What kind of test is the MPN method?

Back 124

Most probable number

Front 125

What are the two indicators used in the alkalinity test?

Back 125

P & M

Phenolphthalein & methyl orange

Front 126

What is the term normality of a chemical solution mean?

Back 126

Equivalent

Front 127

True or False:

Fecal coliform colonies on a membrane filter will be blue.

Back 127

False

Front 128

The endpoint for an alkalinity titration using phenolphthalein should be a pH of:

Back 128

8.3

Front 129

True or False:

always add acid to the water when diluting an acid

Back 129

True

Front 130

What is the correct incubation temperature for total coliform testing?

Back 130

35 degrees + 0.5 Celsius

Front 131

Which media is used for fecal coliform in the membrane filter test?

Back 131

M - FC broth

Front 132

What should the normality of the sulfuric acid be for an alkalinity Titration?

Back 132

0.02N,1/50N,N/50

Front 133

Which treatment process is not simulated with a jar test?

Back 133

A. Coagulation

B. Flocculation

C. Sedimentation

D. Filtration

Answer is D. Filtration

Front 134

What does locking out a piece of equipment mean?

Back 134

Physically isolating it’s energy source

Front 135

What must be done prior to entering a confined space?

Back 135

Atmospheric testing

Front 136

What is the maximum allowable depth of an uninsured excavation?

Back 136

5 feet

Front 137

How many likes must be attached to an energy isolation device?

Back 137

One per worker

Front 138

What are types of conditions are included in confined space atmosphere testing?

Back 138

Oxygen, LEL, Hydro, carbon,

Front 139

What are the maximum allowable slopes for types a, B, and C soils?

Back 139

Slope A is 3/4:1

Slope B is 1:1

Slope C is 1 1/2:1

Front 140

How is stable rock defined for trenching and shoring?

Back 140

Solid mineral

Front 141

Ladders must extend at least ___feet above the trench?

Back 141

3 feet

Front 142

An attendant must be stationed outside every confined space entry

True or False

Back 142

True

Front 143

Each worker must attach a LOTO lock on a locked out machine.

True or False

Back 143

True

Front 144

Oxygen levels in a confined space must be between ____ before the space can be entered.

Back 144

19.5 - 23.5%

Front 145

The maximum excavation depth below a trench box must not exceed:

Back 145

24 inches

Front 146

Which of the following are potential sources of energy that must be isolated during LOTO procedures?

Back 146

A. Hydraulic energy

B. Electrical energy

C. Pneumatic energy

D. All of the above

Answer: D all of the above

Front 147

Ladders must be located no more than _____ feet from workers.

Back 147

25 feet

Front 148

A standby attendant for a confined space entry must;

Back 148

A. Be in visual and verbal contact with the entrance

B. Be able to communicate with emergency responders in case of an accident

C. Terminate the entry if problems develop

D. All of the above

Answer: D all of the above

Front 149

P.A.S.S

stand for fire extinguisher

Back 149

Pull

Aim

Squeeze

Sweep

Front 150

Fire extinguisher A

Used for

Back 150

Wood

Front 151

Fire extinguisher B

is used for

Back 151

Gasoline or propane

Front 152

Fire extinguisher C

is used for

Back 152

Live electrical or computers

Front 153

Fire extinguisher D

is used for

Back 153

Combustible metals

Front 154

Fire extinguisher K

is used for

Back 154

Cooking media

Front 155

Fire triangle is

Back 155

Fuel,oxygen,heat

Front 156

Periodic symbol for potassium

Back 156

K

Front 157

Periodic symbol for calcium

Back 157

CA

Front 158

Periodic symbol for manganese

Back 158

MN

Front 159

Periodic symbol for Iron

Back 159

FE

Front 160

Periodic symbol for copper

Back 160

CU

Front 161

Periodic symbol for lead

Back 161

PB

Front 162

Periodic symbol for sodium

Back 162

NA

Front 163

Periodic symbol for chlorine

Back 163

Cl

Front 164

Iron bacteria:

Back 164

(Crenothrix) deposited iron can release during high flows and cause red water issues

Front 165

Metheglobinemia:

Back 165

Blue baby disease caused by high nitrate levels

Front 166

SDWA

Back 166

Established in 1974

safe drinking water act

Front 167

DPD

Back 167

Reagent added to free chlorine residual test, turns water

pink/red

Front 168

Sodium thiosulfate

Back 168

Neutralizes chlorine in Microbial samples

Front 169

Comprehensive map

Back 169

Large map that shows the overall picture of the entire system. Street names, distribution mains, hydrants, reservoirs, tanks, booster stations, Etc.

Front 170

Vulnerability assessment

Back 170

An assessment of the entire system to determine where weaknesses are if a given disaster should take place and what kind of improvements are feasible to reduce those weaknesses.

Front 171

PH range for coagulation is

Back 171

5 - 7

Front 172

Jar test

Back 172

Lab procedure that simulates coagulation, flocculation and sedimentation

Front 173

Colloids:

Back 173

Very small particles that do not dissolve

Front 174

Lab equipment

Back 174

Beaker: used for mixing chemicals in measuring approximate valves

Graduated cylinder: used to measure values more accurately than beakers

Pipet : used to deliver very accurate volumes and range looks like a straw

Buret: used to deliver accurate volumes very useful in titration

Front 175

Two chemicals that cause hardness in water

Back 175

Calcium and magnesium

Front 176

Hardness in water greater than 100 mg/l as calcium carbonate

Back 176

Soap won’t lather

Front 177

Three materials used in lime softening to raise pH:

Back 177

Lime, caustic soda and soda ash

Front 178

Carbon dioxide mixes with water to form carbonic acid

Back 178

Will lower pH

Front 179

Recarbonation

Back 179

Process that uses carbon dioxide to lower pH final step in lime softening process

Front 180

Bulking

Back 180

Occurs when sludge is not removed from the process often enough

Front 181

Aerobic:

Back 181

Presence of oxygen

Front 182

Aerobic:

Back 182

Presence of oxygen

Front 183

Anaerobic

Back 183

Lack of oxygen

(leads to septic conditions and formation of H2S)

Front 184

Aquifer

Back 184

Underground layer of porous water bearing materials

Front 185

Confined aquifer

Back 185

Water between impervious layers of stratum

(suppressed under pressure)

Front 186

Artesian

Back 186

Water under pressure in a confined aquifer finds a way through the solid slab and raises to a point where the static water level intersect the ground level above

(rises to ground surface)

Front 187

Surface water traits

Back 187

High turbidity, suspended solids, color, microbial contamination

Front 188

Ground water traits

Back 188

Dissolved gases, dissolved solids, lower levels of color, high hardness, no microbial contamination, no organics

(THM’s)

Front 189

What are the three kinds of gravity filters ?

Back 189

Slow sand filter, rapid sand filter, high rate filter

Front 190

What is a primary function of the filter under drain ?

Back 190

Evenly distributes the backwash water throughout the filter

Front 191

What does loss of head mean in a filter?

Back 191

Filter is in need of backwashing

Front 192

What is the backwash rate for a rapid sand filter?

Back 192

15 gallons per minute/square feet of filter area

Front 193

If the backwash time is too short, what problems may result?

Back 193

Formation of mudballs which can only be removed by replacing filter media

Front 194

If the filtration rate is too high, what kind of problems may result?

Back 194

Filter breakthrough which will result in higher effluent turbidity levels

Front 195

Adsorption

Back 195

Gathering of liquid, gas or dissolved substance on the surface of another material

Front 196

Greensand

Back 196

A green filter stand that works as a natural ion exchange resin and is capable of softening water

Front 197

Properties of chlorine gas

Back 197

Greenish yellow in color, 2.5 times heavier than air, non-flammable

Front 198

Leaks and chlorine cylinders can be found using

Back 198

Ammonia vapors and white smoke will appear

Front 199

Chlorine residuals

Back 199

Minimum residual is .2, maximum residual is 4.0 and recommended is 2.0

Front 200

Rotameter

Back 200

Device used to measure the flow rate of gas or liquids

Front 201

What causes red staining and water?

Back 201

Iron

Front 202

What causes black staining in water?

Back 202

Manganese

Front 203

What is meant by disinfection?

Back 203

The process of killing pathogenic organisms in drinking water supply

Front 204

What is free chlorine residual?

Back 204

After the demand has been satisfied, any chlorine that is left will react with water to form hydrochloric acid and hypo chlorous acid

Front 205

What are trihalomethanes?

THM’s

Back 205

THM are also environmental pollutants and many are considered carcinogenic‘s

Front 206

Chlorine gas can be lethal a concentration as low as 40 ppm

True or False

Back 206

False

chlorine gas is lethal in minutes 1000 ppm

Front 207

Calcium hypochlorite is

Back 207

65 - 70% available chlorine

Front 208

A gas chlorinator rotameter reading is?

Back 208

Pounds per day

Front 209

Take the rotameter reading at

Back 209

The widest part of the float

Front 210

What is breakpoint chlorination?

Back 210

Residual obtained after demand has been met

Front 211

What are the characteristics of chlorine gas?

Back 211

Greenish yellow, 2.5 heavier than air, corrosive

Front 212

Which chlorine residual has a noticeable odor ?

Back 212

Greater than 0.2 ppm

Front 213

What test is used for chlorine residual analysis?

Back 213

DPD amperometic titration

Front 214

True or false

Breakpoint chlorination occurs when combined chlorine residuals have been achieved

Back 214

True

Front 215

What are trihalomethanes?

Back 215

DBPS known as disinfection byproducts

Front 216

What is meant by disinfection?

Back 216

The killing of disease causing organisms

Front 217

What two acids are formed when chlorine reacts with water?

Back 217

Hydro chloric and

hypo chlorous acid

Front 218

What are the advantages and disadvantages of ozone disinfection?

Back 218

Removes color taste no residual

Disadvantage expensive

Front 219

What is the maximum gas feed rate for 150 pound cylinder?

Back 219

40 lbs

Front 220

How should you handle chlorine order complaints?

Back 220

Flushing check free chlorine residual

Front 221

What additional pieces of equipment will be needed to feed liquefied chlorine gas from a ton cylinder?

Back 221

An evaporator and expansion tank

Front 222

What chemicals can be used to dechlorinate super chlorinated water?

Back 222

Vitamin C ascorbic acid

Front 223

What is the maximum chlorine residual dechlorination of discharged water?

Back 223

2.0 MG/l

Front 224

True or False

Canister mask are for escape purpose only

Back 224

True

Front 225

Too much potassium permanganate can turn the water

Back 225

Pink

Front 226

A low vacuum in the system can be caused by

Back 226

Clogged injector

Front 227

Liquefied gas is drawn from a ton cylinder using

Back 227

The bottom valve

Front 228

Gas coming from an outside vent line would indicate a

Back 228

Dirty pressure regulating valve

Front 229

If more than 40 pounds per day are drawn from 150 pound chlorine cylinder it will overheat

True or False

Back 229

False

Front 230

MCL for lead is

Back 230

.015

Front 231

Maximum containment level for copper is

Back 231

1.3

Front 232

How do you measure electrical current

Back 232

AMPS

Front 233

Hard water iron and magnesium causes

Back 233

Scaling to boilers

Front 234

NTU stands for

Back 234

Nephelometric turbidity unit

Front 235

DO stands for

Back 235

Dissolved oxygen

Front 236

Total coliform rule is based on

Back 236

Presence or absence of total coliforms.

Front 237

Best way to measure chemical

Back 237

Graduated cylinder

Front 238

Which of the following are the ideal indicator for pathogens?

Back 238

Coliform group bacteria

Front 239

Acids, bases, and salts lacking carbon are?

Back 239

In organic compounds

Front 240

The organisms used to indicate the likely hood that pathogenic bacteria may be present are?

Back 240

Coliform bacteria

Front 241

A physical property, as opposed to a chemical property, important to water treatment is

Back 241

Turbidity

Front 242

Which of the following are the two principal chemicals that cause water hardness?

Back 242

Calcium and magnesium

Front 243

Which of the following statements about viruses is not correct.

Back 243

Viruses cannot survive in the environment for any length of time outside of the humans or animals body

Front 244

Which of the following are commonly used as an indicator of drinking water quality?

Back 244

Coliform bacteria

Front 245

What is the term for the smallest particle that retains the characteristics of the element that it helps form?

Back 245

Atom

Front 246

What is radical?

Back 246

A radical is a group of elements that bond together an act like single Atoms or ions in forming compounds.

Front 247

What measurements are used to express the weight of solute dissolved in a given volume of solution?

Back 247

Milligrams per-liter (MG/ L)

and grains per gallon (GPG)

Front 248

Provisions of which regulation are intended to protect drinking water consumers against the unintended public health consequences associated with consumption of treated drinking water containing residual disinfectants and disinfection byproducts?

Back 248

Disinfectants and disinfection byproducts rule

Front 249

Under the stage 1DBPR, the compliance value for TTHM & HAA5 is determined by calculating a _________\ during the previous 12 months for each DBP for all monitoring locations at each plant.

Back 249

Running annual average

Front 250

Which of the following is not typically a section covered in a sanitary survey?

Back 250

Fire department hydrants

Front 251

The maximum containment level for arsenic

Back 251

Is higher than the technically feasible level

Front 252

This MCL for the following: nitrate, nitrite, fluoride, TTHM, HAA5, arsenic

Back 252

Nitrate 10 MGL, nitrite 1MGL, fluoride 4.0 MGL, TTHM 0.080 MGL,HAA5 0.0 60MGL, arsenic 0.010 MGL

Front 253

List and explain the treatment technic requirements for the following copper, lead

Back 253

1.3 MGL, 0.0 15 MGL, action levels

Front 254

How does the SDWA define a public water system?

Back 254

A supply of pipe water for human consumption that has at least 15 service connections, or serves 25 or more persons 60 or more days each year

Front 255

The movement of water from leaves, grasses, and other plants to the atmosphere is called

Back 255

Transpiration

Front 256

The movement of water from leaves, grasses, and other plants to the atmosphere is called

Back 256

Transpiration

Front 257

A term used to describe cloud formation is

Back 257

Condensation

Front 258

The movement of water from leaves, grasses, and other plants to the atmosphere is called

Back 258

Transpiration

Front 259

A term used to describe cloud formation is

Back 259

Condensation

Front 260

An artesian aquifer could occur in a(n)

Back 260

Confined aquifer

Front 261

The movement of water from leaves, grasses, and other plants to the atmosphere is called

Back 261

Transpiration

Front 262

A term used to describe cloud formation is

Back 262

Condensation

Front 263

An artesian aquifer could occur in a(n)

Back 263

Confined aquifer

Front 264

The process whereby water moves with the air currents in the atmosphere is called

Back 264

Advection

Front 265

The place were ground water accumulates is called a(n)

Back 265

Aquifer

Front 266

Drinking water that is aesthetically acceptable is considered

Back 266

Palatable

Front 267

Providing several treatment processes that can each remove a water containment is an example of what?

Back 267

The multiple barrier approach to water treatment

Front 268

Which function of the Hydrologic cycle is described as water moving with the air currents in the atmosphere?

Back 268

Advection

Front 269

Which function of the Hydrologic cycle is described as water that has collected as snow or ice being released as liquid?

Back 269

Snowmelt

Front 270

Which function of the Hydrologic cycle is described as water that has collected as snow or ice being released as liquid?

Back 270

Snowmelt

Front 271

In what direction does water naturally move?

Back 271

Downhill toward the lowest point