Operation of Wastewater Treatment Plants Volume 2 Review

Question

In the activated sludge process, the oxidation may be by chemical or biological processes.

Answer 1

So filamentous organisms will thrive and the sludge floc will settle properly

Answer 2

So pinpoint floc will develop and be removed by the secondary clarifier

Answer 3

So the contents of the aeration tank will be thoroughly mixed

Answer 4

So the solids will settle properly and the plant effluent will be clear

Answer 5

To comply with the plant's plans and specifications

Answer 6

To keep the aeration tank balanced

Answer 7

To prevent short-circuiting and an uneven distribution of solids in the effluent

Answer 8

To provide a uniform appearing tank

Answer 9

By increasing the influent flows

Answer 10

By reducing the aeration tank capacity

Answer 11

By reducing the effluent flows

Answer 12

By reducing the sludge wasting rate

Answer 13

A high-molecular-weight substance that is formed by either natural or synthetic processes

Answer 14

Clouds of billowing sludge that occur throughout secondary clarifiers and sludge thickeners when the sludge does not settle properly

Answer 15

The gathering together of fine particles after coagulation to form larger particles by a process of gentle mixing

Answer 16

Water contained within the cell mass of sludges or strongly held on the surface of colloidal particles

Answer 17

Settled sludge solids that are removed from the bottom and the floating scum removed from the top of the aerators

Answer 18

Settled sludge solids that are removed from the bottom and the floating scum removed from the top of the clarifiers

Answer 19

Settled sludge solids that are removed from the bottom and the floating scum removed from the top of the digesters

Answer 20

Untreated solids and scum that are removed from the bar screens

Answer 21

Prevents a spark or flame from entering the digester

Answer 22

Prevents air from entering the digester or digester gas from escaping

Answer 23

Relieves excessive pressures in the digester so the water seal will not be blown out

Answer 24

Relieves excessive vacuums so the digester cover will not collapse

Answer 25

Recirculated sludge

Answer 26

Temperature

Answer 27

Volatile acid/alkalinity relationship

Answer 28

Adequate budgets to meet the essential O & M requirements

Answer 29

All operators being properly certified

Answer 30

Conscientious operators using proper techniques for sampling and analysis

Answer 31

Qualified regulators understanding the plant's O & M requirements

Answer 32

Standby generators

Answer 33

Standby monitors

Answer 34

Standby operators

Answer 35

Standby pumps

Answer 36

A collection of individual samples obtained at regular intervals, usually every one or two hours during a 24-hour time span

Answer 37

A collection of samples combined with other samples in proportion to the rate of flow when the sample was collected

Answer 38

A sample portion of material, water, or wastestream that is as nearly identical in content and consistency as possible to that in the larger body being sampled

Answer 39

A single sample of water collected at a particular time and place that represents the composition of the water only at that time and place

Answer 40

Immunization program

Answer 41

Personal hygiene

Answer 42

Personal protective equipment (PPE)

Answer 43

Personnel safety courses

Answer 44

The elimination or reduction of all sources through feasible engineering or administrative controls

Answer 45

The scheduling of work in the high-noise environment when the equipment is not operating

Answer 46

The selection of operators with a high level of noise tolerance to work in the high-noise environment

Answer 47

The use of generous compensation packages when loss of hearing results

Answer 48

A strong undertow pulls the person under

Answer 49

The aerator is too deep for a person to stand on the bottom

Answer 50

The air in the water causes the person to sink to the bottom

Answer 51

There is nothing to grab hold of to keep afloat or to pull oneself out of the aerator

Answer 52

Dry hands in the sunlight when you have finished sampling

Answer 53

Wear disposable, impervious gloves

Answer 54

Wear heavy leather gloves

Answer 55

Wear light, flexible, cotton gloves

Answer 56

Combustible metals, such as magnesium, sodium, zinc, and potassium

Answer 57

Energized electrical equipment, such as starters, breakers, and motors

Answer 58

Flammable and combustible liquids, such as gasoline,oil, and grease

Answer 59

Ordinary combustibles, such as wood, paper, and cloth

Answer 60

So operators can maintain their operator maintenance certificates

Answer 61

So operators will have time to conduct plant tours

Answer 62

To arrange for equipment vendors to observe their products

Answer 63

To operate continuously at peak design efficiency

Answer 64

By using cold water

Answer 65

By using dry air or nitrogen

Answer 66

By using methane gas

Answer 67

By using moist air

Answer 68

Because cost-effective training programs are rarely available for maintenance operators

Answer 69

Because highly trained technicians are readily available at a lower cost than maintenance operators

Answer 70

Because this is a highly specialized field and unqualified people can seriously injure themselves and damage costly equipment

Answer 71

Because union regulations and negotiations forbid maintenance operators from performing this work

Answer 72

A measure of power units used to rate electrical machines or motors or to indicate power in an electric circuit

Answer 73

A practical unit of electrical resistance

Answer 74

The electrical pressure available to cause a flow of current when an electric circuit is closed

Answer 75

The measurement of current or electron flow and is an indication of work being done

Answer 76

A device that allows a motor to be run continuously at its rated horsepower without causing damage to the insulation system

Answer 77

A protective device having a strip or wire of fusible metal which, when placed in a circuit, will melt and break the electric circuit when subjected to an excessive temperature

Answer 78

A switch that is opened automatically when the current or voltage exceeds or falls below a certain limit

Answer 79

An expression representing an electrical connection to earth or a large conductor that is at the earth's potential or neutral voltage

Answer 80

To ensure that all the pumps will fail simultaneously and can be replaced all at once

Answer 81

To equalize wear, keep the motor windings dry, and distribute lubricant in the bearings

Answer 82

To keep the load on the foundation and flow in the pipes balanced

Answer 83

To minimize electricity consumption and system electrical hazards

Answer 84

Compare received signals with other values and send corrective or adjusting signals when necessary

Answer 85

Measure the variable flow indicator and convert this value to a usable number

Answer 86

Pick up the transmitted signal and convert it to a usable number

Answer 87

Send the flow variable to another device for conversion to a usable number

Answer 88

To be sure adequate provisions have been made for the station pumps, equipment, and instrumentation to be easily and properly operated and maintained

Answer 89

To review the plans and specifications to ensure receipt of low bids

Answer 90

To suggest contractors who could do an acceptable job

Answer 91

To verify and confirm the consulting engineers' calculations

Answer 92

Solution hazard

Answer 93

Solution strength

Answer 94

Solution toxicity

Answer 95

Solution volume

Answer 96

The degree of liquid-solids separation occurring when mixing is stopped in the digester

Answer 97

The effectiveness of the digester mixing procedures

Answer 98

The percent of settleable solids being returned to the plant headworks

Answer 99

The strength of the supernatant that is removed from the digester

Answer 100

For protection of aquatic vegetation from toxic chemicals

Answer 101

For protection of fish and other aquatic life

Answer 102

For protection of swimmers from skin rashes

Answer 103

For protection of water supplies from TTHMs

Answer 104

A plastic tube that contains an exact amount of chemical or reagent

Answer 105

A representative portion of a sample. Often, an equally divided portion of a sample

Answer 106

A solution or liquid whose chemical makeup neutralizes acids or bases without a great change in pH

Answer 107

Free from the living germs of disease, fermentation, or putrefaction. Sterile

Answer 108

How can I find a computer course to improve my computer skills?

Answer 109

How can I find funds in the budget to help me?

Answer 110

How can I get the computer staff to assist me?

Answer 111

How can I use a computer to help me do a better job?

Answer 112

Collects, stores, and analyzes information about all aspects of O & M, transmits alarm signals when necessary, and allows fingertip control of alarms, equipment, and processes

Answer 113

Provides standby power to operate critical pumps when power systems fail

Answer 114

Scans plant facilities and reports unusual conditions to plant security

Answer 115

Surveys stakeholders and system users and reports

Answer 116

The difference between the largest and smallest measurement

Answer 117

The measurement that occurs most frequently

Answer 118

The middle measurement when the measurements are ranked in order of magnitude (size)

Answer 119

The sum of all measurements divided by the number of measurements.

Answer 120

The geometric mean describes the distribution

Answer 121

The mean, median, and mode values are different

Answer 122

The mean, median, and mode values will be be approximately the same

Answer 123

The percentile plotting points are different

Answer 124

Committee meetings

Answer 125

Professional conferences

Answer 126

Report writing

Answer 127

Telephones

Answer 128

Develop tailgate safety sessions

Answer 129

Operate and maintain the plant

Answer 130

Promote qualified operators

Answer 131

Schedule plant tours

Answer 132

Deciding who does what work and delegating authority to the appropriate operators

Answer 133

Determining the goals, policies, procedures, and other elements to achieve the goals and objectives of the agency

Answer 134

Guiding, teaching, motivating, and supervising operators and utility staff members

Answer 135

Taking the steps necessary to ensure that essential activities are performed so that objectives will be achieved as planned

Answer 136

Answering to those above in the chain of command to explain how and why you have used your authority

Answer 137

The act in which power is given to another person in the organization to accomplish a specific job

Answer 138

The power and resources to do a specific job or to get that job done

Answer 139

When a manager gives power or responsibility to an employee, the employee ensures that the manager is informed of results or events

Answer 140

By calculating the benefit/cost ratio for the utility

Answer 141

By calculating the net revenue for the utility

Answer 142

By calculating the operating ratio and the coverage ratio

Answer 143

By calculating the rate of return on the utility's assets

Answer 144

A measure of the ability of the utility to pay the principal and interest on loans and bonds in addition to any unexpected expenses

Answer 145

A measure of the total revenues divided by the total operating expenses

Answer 146

The amount of money required annually to pay the interest on outstanding debts

Answer 147

The rate of return on the funds expended on facilities

Answer 148

A computer analytical system that continuously monitors water quality changes in the system

Answer 149

A computer budgeting system that records and monitors costs and revenues

Answer 150

A computer intelligence system that eliminates many tasks performed by operators

Answer 151

A computer-monitored alarm, response, control, and data acquisition system used to monitor and adjust the operation of equipment

Answer 152

To comply with OSHA regulations

Answer 153

To create the proper atmosphere to impress insurance companies

Answer 154

To let employees know that the safety program has the full support of the agency and its management

Answer 155

To let the media and the public know that the agency is safety conscious

Answer 156

Coarse or heavy solids (grit)

Answer 157

Debris, such as roots, rags, and boards

Answer 158

Floatable and settleable material

Answer 159

Soluble or finely divided suspended materials

Answer 160

Failure to supply enough oxygen

Answer 161

High concentrations of acids, bases, and other toxic substances

Answer 162

Maintaining proper solids (floc mass) concentration in the aerator

Answer 163

Proper adjustment of the waste sludge pumping rate

Answer 164

Uneven flows of wastewater, which can cause overfeeding or starvation

Answer 165

Date of the test

Answer 166

Location of the pump

Answer 167

Name of the operator

Answer 168

Pump discharge (flow)

Answer 169

Pump discharge pressure

Answer 170

Changes in operators' shifts

Answer 171

Changes in the sampling program

Answer 172

Flow or waste changes

Answer 173

High solids in the digester supernatant

Answer 174

Temperature changes

Answer 175

Filamentous organisms growing from one floc mass to another

Answer 176

Low nutrient concentrations

Answer 177

Production of a highly jelly-like, waterlogged sludge that has a very low sludge density

Answer 178

Be sure the plant has an up-to-date O & M manual and a set of as-built plans (record drawings)

Answer 179

Check and flush pipe systems and remove any refuse or debris left in them during construction

Answer 180

Ensure protective safety guards are installed on rotating equipment, open tanks, and channels

Answer 181

Make sure tanks are clean; be sure all debris, boards,ladders, and tools have been removed

Answer 182

To the extent possible, operate and test all equipment before admitting wastewater for treatment

Answer 183

Loading rate or food supply (organic solids)

Answer 184

Reproduction rate of acid formers and methane fermenters

Answer 185

Temperature

Answer 186

Volatile acid/alkalinity relationship

Answer 187

By adequate mixing

Answer 188

By chemicals

Answer 189

By methane fermenters

Answer 190

By volatile acids

Answer 191

In anaerobic digesters

Answer 192

In downstream chlorination equipment

Answer 193

In downstream digested sludge concentration equipment

Answer 194

In downstream digested sludge handling equipment

Answer 195

In downstream effluent weirs

Answer 196

Feels different (hotter or vibrating more)

Answer 197

Looks different or unusual

Answer 198

Smells different

Answer 199

Sounds different

Answer 200

Tastes different

Answer 201

Floating sludge

Answer 202

Fluctuating BODs

Answer 203

Wet solids

Answer 204

Adequate supply of equipment operation and maintenance manuals

Answer 205

Equipment warranties and responsibility for acceptance testing

Answer 206

Instrumentation—remote and local control board items and recorders are provided

Answer 207

Paints and protective coatings

Answer 208

Performance requirements and capabilities

Answer 209

To prevent nuisances due to odors or unsightliness

Answer 210

To prevent the wastewater from interfering with the many uses of surface waters

Answer 211

To produce documentation for the record keeping system

Answer 212

To protect the health of the people who may come in contact with it

Answer 213

To provide water for discharge sampling and analysis

Answer 214

Inspect the discharge line, where possible

Answer 215

Look at the water surface over the diffuser or outfall pipe

Answer 216

Observe the flow entering the discharge system for visible pollutants

Answer 217

Open all appropriate valves

Answer 218

Start the pumps (unless it is a gravity system)

Answer 219

Excessive floatables and scum on the surface

Answer 220

Excessive solids accumulated on the bottom have gasified and floated to the surface

Answer 221

Excessive velocity or insufficient detention time

Answer 222

Outlet baffle is not at the proper location

Answer 223

Temperature or weather conditions may favor a particular species of algae

Answer 224

When the lab is not meeting QA/QC requirements

Answer 225

When the lab staff have the opportunity to analyze more samples

Answer 226

When the receiving waters are not meeting established water quality standards

Answer 227

When the treatment plant effluent is not meeting discharge requirements

Answer 228

When the treatment plant staff increases and more time is available to collect more samples

Answer 229

Allows more than one employee to fit into the space and work

Answer 230

Has limited or restricted means for entry or exit

Answer 231

Is large enough and so configured that an employee can bodily enter and perform assigned work

Answer 232

Is not designed for continuous employee occupancy

Answer 233

Requires employees to wear personal protective equipment (PPE)

Answer 234

Flammability

Answer 235

Permeability

Answer 236

Reactivity

Answer 237

Develop written response procedures for reacting to a fire situation, to include evacuation

Answer 238

Provide periodic cleanup of weeds or other vegetation in and around the plant

Answer 239

Provide required service on all fire detection and response equipment (inspection, service, hydrostatic

Answer 240

Regulate the use, storage, and disposal of all combustible materials/substances

Answer 241

Routinely inspect fire doors to ensure proper operation and unobstructed access

Answer 242

Aerobic digesters

Answer 243

Belt filter presses

Answer 244

Centrifuges

Answer 245

Dissolved air flotation thickeners

Answer 246

Gravity belt thickeners

Answer 247

Always check labels on bottles to make sure that the proper chemical is selected

Answer 248

Never handle chemicals with your bare hands

Answer 249

Never use laboratory glassware for a cup or food dish

Answer 250

Use care in making rubber-to-glass connections

Answer 251

Use proper safety goggles or a face shield in all tests where there is danger to the eyes

Answer 252

Accident report forms

Answer 253

Facility plans and specifications and plant inspection reports

Answer 254

Plant's safety policy

Answer 255

Plant's safety rules

Answer 256

Supervisors' guidelines on how to promote and implement a safety plan

Answer 257

Excessive leakage when pumping against a high head

Answer 258

Holes (spacing) being too large in the suction intake screen

Answer 259

Impeller rotating too fast and causing cavitation

Answer 260

Lack of proper priming when starting

Answer 261

Loss of suction when operating

Answer 262

Disturbing external condition

Answer 263

Improper load or service condition

Answer 264

Mechanical fault in the machine

Answer 265

Poor machine design

Answer 266

Poor preparation and care of the machine

Answer 267

All panel instruments

Answer 268

All switch gear and distribution equipment

Answer 269

Enclosures

Answer 270

Fuses and circuit breakers

Answer 271

Wiring integrity

Answer 272

Bearing failures

Answer 273

Contaminants

Answer 274

Overload (thermal)

Answer 275

Single phasing

Answer 276

Examine all unusual factors

Answer 277

Find the cause of the problem

Answer 278

Know what should happen when a switch is pushed

Answer 279

Make a visual inspection

Answer 280

Repair the problem and eliminate the cause, if possible

Answer 281

Digested sludge

Answer 282

Raw sludge

Answer 283

When industrial wastes are discharged after a fine screening process

Answer 284

When plant effluent and reclaimed effluent are pumped through the lines

Answer 285

When RAS (return activated sludge) and WAS (waste activated sludge) are pumped through the lines

Answer 286

When scum and raw sludge are pumped through the same line

Answer 287

When stormwaters carry in grit and silt that are not effectively removed by the grit removal facilities

Answer 288

Floors should be sloped to provide drainage, where needed, and drains should be located in low spots

Answer 289

Overhead clearances of power lines, trees, and roofs should be adequate for a crane to remove large equipment

Answer 290

The alarm system should signal high water levels in the wet well and water on the floor of the dry well

Answer 291

There should be room to use hydrolifts, cranes, and high-velocity cleaners, as needed

Answer 292

There should be sufficient room to set up portable pumping units or other necessary equipment in cases of major station failures or disasters

Answer 293

Electric shock

Answer 294

Infectious materials

Answer 295

Toxic fumes

Answer 296

Because it causes corrosion

Answer 297

Because it causes odors

Answer 298

Because it increases the fuel value of sewer gas

Answer 299

Because it is flammable and explosive under certain conditions

Answer 300

Because it is toxic to your respiratory system

Answer 301

Flasks and condensers should be clean and free from grease or other oxidizable materials

Answer 302

The standard ferrous ammonium sulfate solution is unstable and should be standardized daily

Answer 303

The wastewater sample should be well mixed

Answer 304

Use a wide-tip pipet to ensure a representative sample is added

Answer 305

Use extreme caution and safety precautions when handling the chemicals used for the test

Answer 306

Dissolved inorganic salts, such as found in seawater, can influence the readings from a probe

Answer 307

Do not place the probe directly over a diffuser because you want to measure the dissolved oxygen in the water being treated, not the oxygen in the air supply to the aerator

Answer 308

Keep the membrane in the tip of the probe from drying out

Answer 309

Periodically check the calibration of the probe

Answer 310

Reactive compounds, such as reactive gases and sulfur compounds, can interfere with the output of a probe

Answer 311

Indigestion

Answer 312

Laxative effects

Answer 313

Sewer corrosion problems

Answer 314

Communications

Answer 315

Data analysis

Answer 316

Recordkeeping

Answer 317

Report generation

Answer 318

Systems monitoring

Answer 319

Chemical dosages

Answer 320

F/Ms (Food to Microorganism ratios)

Answer 321

MCRTs (Mean Cell Residence Times)

Answer 322

Percent removals

Answer 323

Suspended solids, BOD, or COD loadings

Answer 324

Database management

Answer 325

Plant template

Answer 326

Spreadsheet

Answer 327

Word processing

Answer 328

Aeration basin dissolved oxygen

Answer 329

Anaerobic sludge digester gas production

Answer 330

Chlorine contact time

Answer 331

Influent flow control gates and valves

Answer 332

Secondary clarifier sludge pumping

Answer 333

Class midpoint

Answer 334

Distribution of data

Answer 335

Measurement frequencies

Answer 336

Spread of data

Answer 337

Width of the class interval

Answer 338

They are needed to fill unused space in storage rooms and filing cabinets

Answer 339

They are needed to show the type and frequency of maintenance and to evaluate the effectiveness of maintenance programs

Answer 340

They can indicate plant efficiency, performance, past problems, and potential problems

Answer 341

They can provide data upon which to base recommendations for modifying plant operation and facilities

Answer 342

They may be needed in damage suits brought against the district or municipality

Answer 343

Chlorine use (lbs or kg)

Answer 344

Influent and effluent temperatures

Answer 345

pH of influent and effluent

Answer 346

Precipitation and air temperature

Answer 347

Raw wastewater flow (MGD from totalizer)

Answer 348

Know the purpose and objective of your report

Answer 349

Know your subject

Answer 350

Omit any recommendations

Answer 351

Organize the report to present your ideas in a logical order

Answer 352

Tailor your report to the person or persons to whom it is directed

Answer 353

Arrange the ideas in a logical sequence

Answer 354

Begin writing

Answer 355

Gather material needed to support the ideas to be presented in the report

Answer 356

List ideas and topics you plan to cover in the report

Answer 357

Prepare conclusions and recommendations after writing the main body of the report

Answer 358

Evaluating employee performance

Answer 359

Issuing orders and instructions

Answer 360

Providing opportunities for advancement for operators and staff

Answer 361

Selecting and training employees

Answer 362

Teaching classes

Answer 363

Advertising the position

Answer 364

Avoiding unacceptable pre-employment inquiries

Answer 365

Interviewing applicants

Answer 366

Paper screening

Answer 367

Selecting the most qualified candidate

Answer 368

Aim for a permanent solution

Answer 369

Create a private environment

Answer 370

Keep your language appropriate

Answer 371

Listen very carefully

Answer 372

Maintain an adult approach

Answer 373

Hook-up charges

Answer 374

Interest income

Answer 375

Taxes or assessments

Answer 376

A method of establishing baseline performance data

Answer 377

Monitoring performance criteria over a period of time

Answer 378

Observing changes in performance so that failure can be predicted and maintenance can be performed on a planned, scheduled basis

Answer 379

The same as corrective maintenance

Answer 380

The same as proactive maintenance

Answer 381

By causing unsafe acts to take place

Answer 382

By disregarding an unsafe work environment

Answer 383

By overlooking or failing to consider any number of safety hazards

Answer 384

By requiring operators to follow safe procedures

Answer 385

By requiring work to be performed in haste

	Criado por Dean Lampman mais de 6 anos atrás

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Operation of Wastewater Treatment Plants Volume 2 Review

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