Wastewater Collection Systems: Questions and Answers, Exams of Water Resources Planning and Management

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2024-2025 WASTEWATER COLLECTIONS III

QUESTIONS AND CORRECT VERIFIED

ANSWERS. GRADED A

A Construction Job Saftey List Typically Contains? - Anspre-Dig Procedures, Inspect Area Before Digging To Determine Trench And Shore Safety Measures, Get Locates, Arrange With Others To Move, Protect Or Relocate Utilities, Make Sure That What Utilities Are Lrft Are Properly Protected, The Person Responsible For Trench Slope And Or Shoring Should Inspect Shoring Materials, Make Sure To Have A Designated Top Man To Watch Out For People In Hole, Always Have A Supervisor Designating Acting Supervisor At The Job Site At All Times. A Drop Manhole Is Used When? A. One Of The Choices Had Something To Do With A 24 Inch Drop B. The Line Velocity Is Greater Than 10ft Per Sec. And The Drop Manhole Is Used To Slow It Down. C. ??? D. Both A And D - Ansa. The Sewer Main Entering The Manhole Is More Than 24 Inch Above The Floor Of The Manhole........ Or B. The Velocity Is The Sewer Is More Than 10ft Per Sec. Which Coukd Result In Damage To The Line From Shock Or Erosion. And The Drop Manhole Is Used To Slow It

As The Size Of The Population Or Area Served Increases The Ratio Of Peak Flow To Daily Flow? A. Increases B. Decreases C. Stays The Same - Ansb. Decreases As Traffic Speeds Go Up Around Construction Site, What Happens To The Spacing Between The Warning Devices? - Ansincrease Bubbler Control Systems Sense Level Changes By? A. Buoyancy B. Bubble Size C. Electrical Flows D. Pressure E. All Of The Above - Ansd. Pressure. Water Levels Increase Or Decrease, Air Bubbling Through A Pipe Increase Or Decrease Pressure Thereby Turning Switch On Or Off

Class Iii Collection System License Or Class B Wastewater Treatment Plant Operator License Is Required For At Least Supervisor Of Construction And Maintenance Crews In Wastewater Systems With Average Flow Greater Than? A. 100, B. 500, C. 1,000,000 - Ansc. 1,000,000. Category Iii Collection System Over 1 Mgd Requires Class Iii Or B License. Frequent Starts And Stops Of A Motor Causes? A. Causes Excessive Wear On Control Circuit Relays B. Causes Excessive Wear On Motors C. Causes Cavitation D. Consumes Less Energy Than A Motor That Operates Continuously E. Keeps Solids Suspended In A Wet Well - Ans How Far Must Equipment Booms Stay From Power Lines? A. 5ft. B. 10ft. C. 20ft. D. 25ft. - Ansb. 10ft.

How Many Years In The Future Must A Designer Consider The Population To Be Served When Designing A Sewer System? - Ans20 To 25 Years Twua. To Figure Out The Population To Be Served Initially And Ultimately By The Proposed Sewer For At Least 20 Years. Teex Wwc. Designer Must Consider The Population To Be Served As Far As 20 To 25 Years In The Future. If A Centrifugal Pump Increases Its Speed By 25% There Is A __________ Increase In Motor Speed A. 25% B. 56% C. 95% - Ansc. 95% A 25% Overspeed Results In 25% More Capacity, 56% More Head And Requires 95% More Motor Horsepower. If The Level Of The Float Switch That Turns On The Lead Pump Is Located Above The Level Of The Gravity Fed Influent Line What Happens?

A. Grease Builds Up On The Influent Line B. The Influent Line Remains Partially Full All Of The Time C. The Influent Line Remains Full All Of The Time. - Ansc. The Influent Line Remains Full All Of The Time. If Wastewater Treatment Operating Company Ceases Operation And Another One Takes Over From Them Which Is True? A. New Company Must Immediately Apply For A New Certification. B. New Company Must Notify Tnrcc Within 30 Days C. Operators Can Continue To Work By Virtue Of Their Individual Certifications (There Was A Fourth Choice But Not Remebered) - Ansa. New Company Must Immediately Apply For A New Certification (Is Probably The Correct Answer) Operations Company Are Not Transferable. Every Ww System Operations Co. Must Hold A Valid Certificate Of Registration

In A Pressure Sewer System Where There Are Grinder Pumps On Every Residence Who Owns The Grinder Pump? A. The Respective Resident B. The Collection System C. ??? - Ansb. The Collection System. Not Sure What The Question Is Yet............ A. Requires A Permit For Ocean Dumping B. Requires A Permit For Sewer Sludge Disposal C. Establishes Npdes D. All Of The Above - Ansd. All Of The Above Participatory Management Means? A. Listen To Ideas And Then Take Over B. Be A Member Instead Of A Boss - Ansb. Be A Member Instead Of A Boss

Septic Skudge? A. Smells Good B. Has A Sweet Smell C. More Difficult To Treat - Ansc. More Difficult To Treat Spetic Sludge Causes Operating Problems Setting Goals Works Best When? A. Accompanied By An Action Plan B. Developed By Manager C. Developed By Employee - Ansc. Developed By Employee The Most Critical Factors Of The Final Grade Of A Gravity Wastewater Pipe Should Be? A. Alignment

B. Choice Of Pipe Materials C. Choice Of Leveling Equipment D. Choice Of Excavating Equipment E. Choice Of Pipe Bedding - Anse. Choice Of Pipe Bedding The Primary Cause Od Sewer Stoppage Is? - Ansroots And Grease The Primary Goal Of A Wastewater Collection System? - Anscollect And Transport Waste From Point Of Origin To Point Of Treatment. Wastewater Force Main Pressure Rating Is. A. 75 B. 100 C. 125 D. 150 E. 200 - Ansd. 150 What Are The Characteristics Of Fresh Sewage? - Ansdishwater Grey, Slight Fecal Odor, Has Floating Particles

What Are The Criteria For Selecting Correct Type Of Pipe? - Ans1. Chemical Characteristics Of Water In The Pipe

2. Characteristics Of Industrial Waste
3. Possibility Of Septic Conditions
4. Exclusion Of Infiltration
5. External Forces
6. Internal Forces
7. Abrasion What Are The Symptoms Of Carbon Monoxide Poisoning? A. Headache B. Dizziness C. Drowsy D. All Of The Above - Ansd. All Of The Above Toxic Symptoms. Headache, Mental Dullness, Dizziness, Weakness, Nausea, Vomiting, Loss Of Muscular Control, Increased Then Decreased Pulse, Unconscious, Death

What Are The Symptoms Of Excessive Carbon Dioxide? - Ansunconscious What Is A Pneumatic Ejector? A. A Tyor Of Liftstation Pump Device - Ansa. A Tyoe Of Liftstation Pump Device. Used In Small Liftstations What Is The Correct Height Of The Shoring When Trench Shoring? A. The Shoring Extends Just Below The Lipof The Trench B. The Shoring Is Even With The Top If The Trench C. The Shoring Extends Two Feet Above The Top Of The Trench - Ansc. The Shoring Extends Two Feet Above The Top Of The Trench What Is The Minimum Air Gap Between A Water Drain Line And The Overflow From A Sewer Line? A. One Drain Pipe Width

B. Two Drain Pipe Widths (Two Other Options ) - Ansb. Two Drain Pipe Width An Air Gap Of A Minimum Of 18 Inches Or 2 Pipe Diameters, Which Ever Is Greater What Is The Minimum Structure Life? - Ans50 Years. (The Collection System Design Shall Provide A Minimum Structural Life Cycle Of 50 Years) What Is The Minimum Velocity Acceptable In The Collection System? - Ans2ft Per Second (Desirable Flow Is 3 -5ft Per Second) What Is The Most Common Pump Found In The Collection System? A. Air B. Diaphragm

C. Centrifugal D. Inclined Pump - Ansc. Centrifugal What Is The Primary Concern Of A Sewer Rehabilitation Program? - Ansfirst Step To Define A Rehab Program Is To Develop A Comprehensive, Written Description Of The Major Parts Of Your Collection System, Then Analyze The Condition Of The System, Set Goals For Rehab Program What Is The Purpose Of A Sanitary Sewer Evaluation? - Anssewer System Evaluation Survey Is A Systematic Examination Of Tributary Sewer Systems Or Sub- Sections Of The Tributary Sewer System That Have Demonstrated Possible Excessive Inflow And Infiltration. Examination Will Determine The Location, Flow Rate And Cost Of Correction For Each Definable Element Of The Total Inflow And Infiltration Problem. What Type Of Valve Is Used To Isolate Pumps? A. Gate B. Plug C. Sluice D. Globe

E. Butterfly - Ansa. Gate When Using A High Velocity Jet Machine? A. Enter On The Upstream Side B. Enter On The Downstream Side C. Etc. - Ansb. Enter From The Downstream Side Direct Hose And Nozzle Upstream Which Of The Following Are Hydraulic Sewer Cleaning Devices? - Ansballs, Kites, Bags And Shielded Scooters Who Must Be Notified According To The Osha Hazardous Communications Regulations? A. Individuals Who Work With Chemicals Once A Week B. Individuals Who Work With Chemicals Once A Month C. Everyone In The Organization - Ansc. Everyone In The Organization

Why Is A Pretreatment Program Beneficial? A. Protects System B. Protects Treatment Plant Etc. E. All Of The Above - Anse. All Of The Above Protects The Potw, Prevents Sewage Sludge, Contamination, Workers, Pollution From Getting In To The Effluent, Environment.