TEXAS WASTEWATER
CLASS A
[Document subtitle]
[DATE]
[COMPANY NAME]
[Company address]
, Certainly! Here are the questions numbered along with their answers:
1. Seeding of BOD samples is necessary when samples (All of the above) have a chlorine
residual, have previously been chlorinated, have been subjected to high temperatures,
contain high or low pH industrial wastes.
**Answer:** All of the above.
2. When is blue-green algae the most dominant on a pond treatment system?
**Answer:** Summer.
3. 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 3.14 x 1.25 x 1.25 x
2 = 4.9 cfs x 449 = 2,200 gpm.
**Answer:** 2,200 gallons per minute.
4. 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?
**Answer:** 60 minutes.
5. 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 (or 95%).
**Answer:** 95 percent.
6. When must TCEQ be notified about expansions of a treatment facility?
**Answer:** Before construction.
7. In an anaerobic digester, the percentage of methane and carbon dioxide gas content
should be:
**Answer:** 70% methane, 30% carbon dioxide.
CLASS A
[Document subtitle]
[DATE]
[COMPANY NAME]
[Company address]
, Certainly! Here are the questions numbered along with their answers:
1. Seeding of BOD samples is necessary when samples (All of the above) have a chlorine
residual, have previously been chlorinated, have been subjected to high temperatures,
contain high or low pH industrial wastes.
**Answer:** All of the above.
2. When is blue-green algae the most dominant on a pond treatment system?
**Answer:** Summer.
3. 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 3.14 x 1.25 x 1.25 x
2 = 4.9 cfs x 449 = 2,200 gpm.
**Answer:** 2,200 gallons per minute.
4. 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?
**Answer:** 60 minutes.
5. 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 (or 95%).
**Answer:** 95 percent.
6. When must TCEQ be notified about expansions of a treatment facility?
**Answer:** Before construction.
7. In an anaerobic digester, the percentage of methane and carbon dioxide gas content
should be:
**Answer:** 70% methane, 30% carbon dioxide.
