Texas Wastewater Class A Prep Exam Fully Solved 2024.

Seeding of BOD samples is necessary when samples - Answer (All of the above) have a chlorine residual, have a previously been chlorinated, have been subjected to high temperatures, contain high or low pH industrial wastes When is blue-green algae the most dominant on a pond treatment system? - Answer Summer 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 3.14x1.25 x 1.25 x 2 = 4.9 cfs x 449 = 2,200 gpm - Answer c. 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? 3.14x0.416 x 0.416 x0.416 x 50 x7.48 = 84.5 gpm 5000 gal = 59,2min 84.5 gpm b. 29 - Answer 60 minutes If an existing centrifugal pump motor is replaced with a motor with 25 percent more speed, the motor horsepower required will increase by 1.25 x 1.25 x 1.25 = 1.95 - Answer 95 percent When must TCEQ be notified about expansions of a treatment facility? - Answer Before construction In an anaerobic digester, the percentage of methane and carbon dioxide gas content should be - Answer 70% methane, 30% carbon dioxide The temperature of an anaerobic digester should be maintained at a minimum of - Answer 95° F What type of wastewater treatment operates in the endogenous bacteria growth phase? - Answer Extended air