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Wastewater Treatment Class B Test Questions and Answers 100% Correct
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Wastewater Treatment Class B Test Questionsand Answers 100% Correct
Lift stations at a treatment plant or those which discharge directly to a treatment
plant with an average flow greater than 0.1 MGD shall have three or more pumps or
have automatically controlled variable capacity pumps, these pumps should be
adjusted to actual flow conditions and controlled to operate so as to: - Minimize
surges in the treatment in the treatment units.
In the contact stabilization system of activated sludge treatment, the detention time
in the contact zone is designed be _______ other types of activated sludge treatment. -
shorter than
According to current TCEQ wastewater operator certification rules, an operator can
renew a Class D Wastewater Treatment Plant Operator if he or she:
A) Works only in a collection system
B) Is an operator at an activated sludge plant
C) Is an operator at a trickling filter treatment facility with a permitted daily average
flow of 0.15 MGD.
D) Both A and C.
E) None of the Above - None of the Above
If a Leak is suspected in an off-line, back-up, one-ton chlorine cylinder, after putting
on proper safety equipment, the operator should first: - Call appropriate emergency
response personnel.
The definition of an oxygen-deficient atmosphere is one that contains less than
________ percent oxygen. - 19.5
A combustible atmosphere: - contains oxygen and flammable gas, vapor, or dust
All of the following EXCEPT ________ are damaging or irritating to the mucus
membranes or lungs if inhaled:
A) Ozone
B) Lime Dust
C) Chlorine Gas
D) Carbon Dioxide
E) Ferric Chloride Dust - Ozone
The Sludge Volume Index (SVI) is: - the volume of settled sludge (30-minutes) in
ml/L times 1000, divided by the concentration in mg/L of MLSS.
Biomonitoring - Involves the use of aquatic life to test the toxicity of a wastewater
treatment plant effluent.
, A 24-Hour composite sample was tested for chlorine residual and found to contain
none. These results indicate that: - Residual chlorine was NOT present during the 24-
hour period.
In an activated sludge treatment plant, the 30 minute settleability test indicates:
A) The clarity of the effluent
B) The influence of surface tension settling
C) The current settling capabilities in the clarifier
D) The ability of the organisms to flocculate and settle.
E) All of the above - E) All of the above
Setting work goals for an individual works best - Accompanied by an action plan
One element of being an effective communicator is to: - be a good listener
An efficient primary clarifier is expected to remove _______ of the influent, settable
solids. - 90 percent or better
Primary wastewater treatment facilities make use of - the force of gravity and
density differences between the water and the solids.
If the inside diameter of the lift station wet well is 8 feet, and the vertical separation
between "lead pump on" and "all pumps off" (low water line) is 4 feet 9 inches, the
approximate storage in the wet well during a normal pump cycle is: - 1,785 gallons
Assume that both pumps shown in the exhibit are working. The function of float
switch B is to turn : - The lead pump on
The extent of treatment necessary at a particular wastewater treatment plant
depends upon:
A) The treatment plant location
B) Water quality standards set for the receiving stream
C) Amount and final use of the treatment plant effluent
D) the type and concentration of wastes received at the plant for treatment .
E) All of the above - All of the above
In most pressure sewer systems, the plumbing units or grinder pumps at each
residence are considered to be - the integral part of the wastewater collection
system
Assume that a pumping unit with a 14 3/4 inch impeller has characteristics as
described by the pump curve shown in the exhibit. If the pumping unit is working
against a static head of 47 feet, and the force main on the discharge side has a total
friction loss of 4 feet, the approximate pump discharge should be - 1550 gallons per
minute
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