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TEXAS WASTEWATER CLA SS A | 200
QUESTIONS WITH 100% CORRECT
ANSWERS | VERIFIED | LATEST
UPDATE
Question :Seeding of BOD samples is necessary when
samples (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
Correct answer:(All of the above)
Question :Why is recirculation needed in a trickling filter?
Keep the media wet Further reduce BOD All of the above (a, b, and c)
Correct answer:All of the above (a, b, and c)
Question :What type of fire extinguisher would be used on an
electrical control panel that has been de-energized?Class A Class C (a and d)
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Correct answer:(a and d)
Question :What is eutrophication in a pond system?
Enrichment with nitrogen and phosphorous Causes algae blooms (b and c)
Correct answer:(b and c)
Question :Carbon monoxide (CO) poisoning symptoms are
tightness in the chest nausea drowsiness and headache (all of the above)
Correct answer:(all of the above)
Question :Dangerous gases in a confined space may not be
detected with the physical senses because some gases have no odor some gases may deaden the sense of smell some gases may displace the oxygen (all of the above)
Correct answer:(all of the above)
Question :What are the dangerous gases a collection system
worker might come into contact with?
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CO2 CO НaS CH4 (all of the above)
Correct answer:(all of the above)
Question :Monitoring and reporting records of a wastewater
treatment plant shall be kept at the facility site for a period of
- three years
Correct answer:d. three years
Question :The TCEQ Design Criteria requires that deflection
tests be performed on all new installed flexible or semi-rigid pipe after the final backfill has been in place for 30 days. This deflection test is usually performed using a rigid ball or mandrel that has a diameter equal to -percent of the inside diameter of the pipe.
- 95
Correct answer:c. 95
Question :Seeding of BOD samples is necessary when
samples
- all of the above
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Correct answer:e. all of the above
Question :What is the purpose of biomonitoring of a plant's
effluent?
- Test for toxicity
Correct answer:d. Test for toxicity
Question :In an anaerobic digester, the percentage of methane
and carbon dioxide gas content should be
- 70% methane, 30% carbon dioxide
Correct answer:b. 70% methane, 30% carbon dioxide
Question :The sludge from a primary clarifier should contain
what percent solids?
- 4% to 6%
Correct answer:b. 4% to 6%
Question :What is the standard chlorine residual and contact
time on Texas discharge permits?