Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS , Exams of Nursing

Download Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS and more Exams Nursing in PDF only on Docsity! Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ What is TCEQ doing to control "point source" pollution of the Texas waterways? - correct answers *Permitting of domestic wastewater plants *Permitting of industrial wastewater plants Describe proper design of force main wastewater lines. - correct answers Minimum two fps velocity with the smallest pump operating alone. Minimum four inch diameter pipe with 150 psi rating. What is Standard Dimension Ratio? - correct answers Ratio of outside pipe diameter (OD) to wall thickness (PVC) Describe proper design of gravity wastewater lines. - correct answers Designed to flow half full ,under normal conditions, at a minimum of two fps and a maximum of ten fps. Manholes should have a minimum opening of? - correct answers 24 inches and be at least 4 feet wide. pH meters should be calibrated how often? What standards should be used for calibration purposes? - correct answers Daily with at least two buffers. What is the standard chlorine residual and minimum contact time on Texas wastewater permits? - correct answers a. 1.0 mg/L for a minimum 20 minutes detention time at peak flow b. No chlorine residual needed if detention time is greater than 21 days As the complexity of an organization increases, what management function becomes most important? - correct answers Planning Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ What is the effective chlorine disinfecting agent? - correct answers Hypochlorous Acid (HOCl) Does pH affect the chlorination process? Explain your answer. - correct answers When using free chlorine the disinfectant is HOCl acid. As such it is much more effective at pH's below 7.0. Above 7.0 pH the acid begins to be neutralized. What is the effluent chlorine residual in Texas that is standard on permits and the minimum detention time? What is the maximum residual allowed? - correct answers Texas standard is 1.0 mg/L for a minimum 20 minutes detention time at peak flow. Maximum residual allowed is 4.0 mg/L. A treatment plant has a clarifier that is 60 feet in diameter and is 10 feet deep. The weir is 2 feet inside the outer clarifier wall. The flow is 1.0 MGD. The weir and outflow channel is 3 feet deep. a. What is the detention time in hours? - correct answers Formula What activated process cannot nitrify in a single stage? - correct answers Contact Stabilization What is the GPM output of a piston pump with an 8-inch diameter piston with a 10-inch stroke operating at 50 strokes per minute? - correct answers Formula A treatment plant has a clarifier that is 60 feet in diameter and is 10 feet deep. The weir is 2 feet inside the outer clarifier wall. The flow is 1.0 MGD. The weir and outflow channel is 3 feet deep. a. What is the detention time in hours? b. What is the surface loading in gal/ft2/day? Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ Which of the following are considered normal operator controls on an activated sludge plant? - correct answers *aeration rates *return and wasting rates Reducing the return sludge flow rate for an activated sludge system which has a good settling sludge will ________. - correct answers increase the RAS concentration and the clarifier sludge blanket thickness An extended air activated sludge plant has a fast settling sludge and high amounts of pin floc leaving the clarifier. One way to correct this problem is to ________. - correct answers * reduce the MCRT by wasting more * increase the F/M ratio by wasting more The primary causes of wastewater stoppages are ________. - correct answers roots and grease The inside diameter of a manhole must be how wide? - correct answers 48 inches On a construction job site, equipment booms must maintain at least how many feet of clearance from overhead electric lines? - correct answers 10 feet Digester gas should contain about ________. - correct answers a. 65% - 75% methane A treatment plant has two primary clarifiers. Each has a diameter of 40 feet and a depth of 12 feet. If the design flow is 1.2 mgd, find the surface loading Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ on each clarifier in gallons/ft2/day. Assume the flow is equally split between the two clarifiers. 3.14 x 20 x 20 = 1256 1,200,000 /2 = 600,000 gallons each 600,000/ 1256 - correct answers b. 478 gallons/ft2/day Distilled water used for the BOD analysis should not exceed ________. - correct answers 0.2 mg/L depletion One element of being an effective communicator is to ________. - correct answers a. be a good listener In order to promote a collaborative management style, one thing a supervisor can do is ________. - correct answers join the team as a member rather than as boss One thing an employee can do to be a good team member is to ________. - correct answers try to understand other people's needs and desires Seeding of BOD samples is necessary when samples ________. - correct answers a. have a chlorine residual b. have previously been chlorinated c. have been subjected to high temperatures d. contain high or low pH industrial wastes Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ A 30-inch diameter wastewater interceptor is observed to be flowing half-full at about two fps. The approximate volume of wastewater flowing through the pipe is ________. - correct answers 2,200 gallons per minute A one-cylinder reciprocating sludge pump with a 10-inch bore and a 5-inch stroke pumps at a rate of 50 cycles per minute. How many minutes must the pump be operated to pump 5,000 gallons of sludge? - correct answers 60 minutes Review exhibit E in the separate package. According to the DMR, the TSS data shows ________. a. a violation of the daily average b. a violation of the number of grab samples c. a violation of the 7-day average d. a violation of the daily max e. no violation - correct answers Need DMR Review exhibit E in the separate package. According to the DMR, the cBOD data shows ________. a. a violation of the daily average b. a violation of the number of grab samples c. a violation of the 7-day average d. a violation of the daily max e. no violation - correct answers Need DMR Review exhibit E in the separate package. According to the DMR, the NH3-N data shows ________. a. a violation of the daily average Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ d. 4.2 - correct answers Formula A wastewater treatment plant has a clarifier that is 80 feet in diameter and is 12 feet deep. The flow is 2.5 mgd. The single weir is two feet inside the outer wall and is 3 feet deep What is the hydraulic loading on the clarifier in gal/sq. ft/day? a. 598 b. 698 c. 551 d. 614 - correct answers Formula A wastewater treatment plant has a clarifier that is 80 feet in diameter and is 12 feet deep. The flow is 2.5 mgd. The single weir is two feet inside the outer wall and is 3 feet deep. What is the weir loading in gal/linear ft/day? a. 10,000 b. 10,460 c. 11,276 d. 11,400 - correct answers Formula How should shoring be removed from a trench? - correct answers from the bottom up Effective communication depends on ________. - correct answers being a good listener Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ According to 30 TAC Chapter 317, all pipe and fittings used in wastewater pressure mains shall have a minimum psi pressure rating of ________. - correct answers 150 The smallest pipe size for air recirculation of a self-priming centrifugal pump is ________. - correct answers 1 inch The goal of a sanitary wastewater survey is to ________. - correct answers identify problems in the system needing rehab Sewer balls and pigs are what type of wastewater cleaning equipment? - correct answers mechanical cleaning equipment When setting goals for an employee, the goals should be ________. - correct answers accompanied by an action plan According to Chapter 317 Design Criteria, a manhole can be installed within nine feet of an existing waterline if ________. - correct answers the manhole is completely watertight and tested for no leakage As the population of a collection system increases, the ratio of peak flow to average daily flow will ________. - correct answers decrease If a wastewater pipe has a slope of 4 feet in 200 feet, it is referred to as ________. - correct answers two times the inlet pipe diameter One of the requirements of the Texas Hazard Communication Act of 1985 is that the employer mush hold annual training in which the utilities' written Texas Wastewater A EXAM 91QUESTIONS AND ANSWER 2024 BEST EXAM SOLUTION GUARANTEED SUCCESS Graded A+ policies and the employee's rights are explained to ________. - correct answers all employees The Federal Clean Water Act________. - correct answers requires a permit for disposal of sludge brequires a permit for ocean discharges of sewer requires a permit for disposal or placement of dredge material creates a national permit system for all wastewater discharge e. all the above If an employee is guilty of misconduct as defined by the utilities personnel policies, the supervisor should________. - correct answers *attempt to modify the employee's behavior through training and other forms of assistance *inform the employee of the consequences if the behavior is not modified When fighting an electrical fire, you should________. - correct answers *Use non-conductive extinguishing methods *Use Class A or B extinguishers if you are certain electricity to the unit has been shut-off If the float that turns on the lead pump in a wastewater lift station is situated above a gravity influent line, the line will________. - correct answers tend to have a grease problem If an operations company ceases its operation or is sold such that the control of the company is transferred to another party, ________. - correct answers the company's operations certificate is revoked