SBVC Sample WW Exam Study Guide Solutions

©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




SBVC Sample WW Exam Study Guide

Solutions


Channel type grit chambers should have flow through velocity of at least 2.0 feet per second. (True or

False) - ANSWER✔✔-False


Aerobic digesters produce more methane gas than anaerobic digesters, but it is all lost to the

atmosphere in the aerobic digester. (True or False) - ANSWER✔✔-False


Coliform bacteria are generally considered to be harmless to humans. (True or False) - ANSWER✔✔-True


In normal practice, a secondary digesters main function is to allow solids to separate from the liquid

portion in the digester. (True or False) - ANSWER✔✔-True


Recirculation as practice in the operation of a biological filter is used to recycle the zoogleal slime which

has sloughed from the media. (True or False) - ANSWER✔✔-True


A sample collected for the BOD test may be preserved for 24 hours by adding 1.0 ml/L of sulfuric acid

and refrigerating at 4 degrees Celsius. (True or False) - ANSWER✔✔-False


Inefficient grit removal would tend to cause an increase in the percent volatile solids in the raw sludge.

(True or False) - ANSWER✔✔-False

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, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




In order to make the best use of time, preventative maintenance should be performed as time permits

rather than scheduling each task. (True or False) - ANSWER✔✔-False


In the lubrication of motors, bearings, and other mechanical equipment, a good rule of thumb is to

exceed the manufacturers specifications because the more lubrication the longer the equipment will

last. (True or False) - ANSWER✔✔-False


Carbon Monoxide and hydrogen sulfide are both toxic gases at room temperature. (True or False) -

ANSWER✔✔-True


When categorizing anaerobic digesters, the term standard rate and high rate refer to the reaction of rate

values for acid and methane formation. (True or False) - ANSWER✔✔-False


One purpose of an inlet baffle in a settling tank is to disperse the flow. (True or False) - ANSWER✔✔-True


The frequency of pumping raw sludge from a primary clarifier to an anaerobic digester is the main factor

that determines percent solids in the raw sludge. (True or False) - ANSWER✔✔-True


Organic loading to a wastewater treatment pond is usually expressed as pounds BOD per acre-feet per

day. (True or False) - ANSWER✔✔-False


Good laboratory practices include great care when eating, drinking, and/or smoking while working in the

laboratory. (True or False) - ANSWER✔✔-False




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, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Although carbon dioxide is not classified as a poisonous or explosive gas, a high level of this gas in a

confined space is still a safety concern. (True or False) - ANSWER✔✔-True


The first operating guideline that begins to change when an anaerobic digester is starting to become

upset is the pH. (True or False) - ANSWER✔✔-False


Chlorine dosage rate equals the chlorine demand minus the chlorine residual. (True or False) -

ANSWER✔✔-False


Turbidity is usually caused by high concentrations of dissolved solids. (True or False) - ANSWER✔✔-True


An operator would expect to find the highest concentration of hydrogen sulfide gas near the top of a

manhole. (True or False) - ANSWER✔✔-False


Nitrate compounds can be a source of combined oxygen when treating an upset pond system. (True or

False) - ANSWER✔✔-True


Normally, one would expect the pH to decrease when one observes an increase in the D.O. of a typical

facultative pond. (True or False) - ANSWER✔✔-False


Dissolved oxygen concentrations of 15 mg/L or greater may be found in a facultative pond during a late

summer afternoon on a sunny day. (True or False) - ANSWER✔✔-True


A 24 hour flow proportioned composite sample of chlorinated effluent should be used for the coliform

MPN test. (True or False) - ANSWER✔✔-False

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