Mixed liquor is a term used to describe the
a. contents of a sludge digestion tank
b. contents of a activated sludge aeration tank
c. film of microorganisms growing on a trickling filter
d. drink a treatment plant operator has with his or her lunch
e. contents of a sludge thickening tank
b
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____ ensures trouble-free operation of the engine and the machine it’s powering, as is a complete pre-run inspection each time the engine is used.
a. Scheduled maintenance b. Emergency maintenance c. Regular usage d. Systematic upgrades
The weight supported by any single conduit shall not exceed ____ pounds.
A. 10 B. 20 C. 25 D. 30
How is a brine solution created?
A) Water and sugar are mixed. B) Salt and air are mixed. C) Salt and sugar are mixed. D) Salt and water are mixed.
A protractor is used to measure ________.
A. distance B. arcs C. angles