The Wastewater Treatment B Test
Questions With 100% Verified
Answers
Liftstations 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: - CORRECT ANSWER-
Minimize surges in the treatment in the treatment units.
Activated carbon is used in physical-chemical treatment of wastewater to remove
primarily: - CORRECT ANSWER-Chlorine
Anaerobically digested sludge should applied to a drying bed to a depth of about: -
CORRECT ANSWER-4 to 6 inches
The maximum design organic loading for stabilization ponds is 35 pounds of BOD per
acre per day. A city with a 10 acre stabilization pond currently receives a daily flow of
about 125,000 gpd with an average of 240 mg/l. The city has an application from an
industry to construct a plant which will add a flow of 50,000 gpd with an average BOD of
450 mg/l. In order to accommodate the combined flows, the city's pond area must be
expanded by a minimum of: - CORRECT ANSWER-2.5 acres
A sewer construction project in rocky ground will require a 2 feet wide by 350 foot long
trench with an average depth of 10 feet. The new pipe and select bedding material
(hauled in) will occupy the bottom third of the trench. Assuming that the rest of the soil
from the trench can be used for backfill, the cubic yards of spoil dirt which must be
hauled away will be about: - CORRECT ANSWER-86 cubic yards
, 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. -
CORRECT ANSWER-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 - CORRECT ANSWER-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: - CORRECT ANSWER-Call
appropriate emergency response personnel.
The definition of an oxygen-deficient atmosphere is one that contains less than
________ percent oxygen. - CORRECT ANSWER-19.5
A combustible atmosphere: - CORRECT ANSWER-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
Questions With 100% Verified
Answers
Liftstations 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: - CORRECT ANSWER-
Minimize surges in the treatment in the treatment units.
Activated carbon is used in physical-chemical treatment of wastewater to remove
primarily: - CORRECT ANSWER-Chlorine
Anaerobically digested sludge should applied to a drying bed to a depth of about: -
CORRECT ANSWER-4 to 6 inches
The maximum design organic loading for stabilization ponds is 35 pounds of BOD per
acre per day. A city with a 10 acre stabilization pond currently receives a daily flow of
about 125,000 gpd with an average of 240 mg/l. The city has an application from an
industry to construct a plant which will add a flow of 50,000 gpd with an average BOD of
450 mg/l. In order to accommodate the combined flows, the city's pond area must be
expanded by a minimum of: - CORRECT ANSWER-2.5 acres
A sewer construction project in rocky ground will require a 2 feet wide by 350 foot long
trench with an average depth of 10 feet. The new pipe and select bedding material
(hauled in) will occupy the bottom third of the trench. Assuming that the rest of the soil
from the trench can be used for backfill, the cubic yards of spoil dirt which must be
hauled away will be about: - CORRECT ANSWER-86 cubic yards
, 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. -
CORRECT ANSWER-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 - CORRECT ANSWER-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: - CORRECT ANSWER-Call
appropriate emergency response personnel.
The definition of an oxygen-deficient atmosphere is one that contains less than
________ percent oxygen. - CORRECT ANSWER-19.5
A combustible atmosphere: - CORRECT ANSWER-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
