2025 – 2026 ABC WASTEWATER LEVEL 3
(LAB) EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
A certain determination made on a sample of mixed liquor
from aeration tanks shows "the volume in milliliters of one
gram of sludge after settling 30 minutes.to This
determination is known as the
A. SS test
B. Sludge volume index
C. Settleable solids test
D. Sludge stability test - ANSWERS-B. Sludge volume index
51. The end point for the titration of the distillation method
of the volatile acids test is
A. The change to a yellow or light tan color
B. The change from brown to a straw yellow color
,C. The change from blue to colorless after the addition of
starch
D. The change from colorless to pink - ANSWERS-D. The
change from colorless to pink
The indicator methyl orange is used in the test for
A. Hardness
B. Chlorine residual
C. Alkalinity
D. Turbidity - ANSWERS-C. Alkalinity
A spectrophotometer is used to measure
A. DO
B. Dissolved solids
C. Settleability
D. Color intensity - ANSWERS-D. Color intensity
The significance of running a fecal coliform test is
A. To indicate pathogenic organisms
B. To indicate recent wastewater pollution
C. To indicate a measure of waste strength
, D. To indicate the presence of rotifers - ANSWERS-B. To
indicate recent wastewater pollution
The best procedure for determining the SS of a plant
effluent is to analyze
A. A 24-hr composite sample of the effluent
B. A grab sample of the effluent at high flow
C. A grab sample of the effluent at low flow
D. A series of grab samples taken at different times during
the day - ANSWERS-A. A 24-hr composite sample of the
effluent
A sample obtained by taking portions of wastewater at a
collection point in proportion to the flow is called
A. A most probable number (MPN)
B. A weighted composite
C. A routine sample
D. A bacterial-solids sample - ANSWERS-B. A weighted
composite
Settleable solids by volume are determined through the use
of
(LAB) EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
A certain determination made on a sample of mixed liquor
from aeration tanks shows "the volume in milliliters of one
gram of sludge after settling 30 minutes.to This
determination is known as the
A. SS test
B. Sludge volume index
C. Settleable solids test
D. Sludge stability test - ANSWERS-B. Sludge volume index
51. The end point for the titration of the distillation method
of the volatile acids test is
A. The change to a yellow or light tan color
B. The change from brown to a straw yellow color
,C. The change from blue to colorless after the addition of
starch
D. The change from colorless to pink - ANSWERS-D. The
change from colorless to pink
The indicator methyl orange is used in the test for
A. Hardness
B. Chlorine residual
C. Alkalinity
D. Turbidity - ANSWERS-C. Alkalinity
A spectrophotometer is used to measure
A. DO
B. Dissolved solids
C. Settleability
D. Color intensity - ANSWERS-D. Color intensity
The significance of running a fecal coliform test is
A. To indicate pathogenic organisms
B. To indicate recent wastewater pollution
C. To indicate a measure of waste strength
, D. To indicate the presence of rotifers - ANSWERS-B. To
indicate recent wastewater pollution
The best procedure for determining the SS of a plant
effluent is to analyze
A. A 24-hr composite sample of the effluent
B. A grab sample of the effluent at high flow
C. A grab sample of the effluent at low flow
D. A series of grab samples taken at different times during
the day - ANSWERS-A. A 24-hr composite sample of the
effluent
A sample obtained by taking portions of wastewater at a
collection point in proportion to the flow is called
A. A most probable number (MPN)
B. A weighted composite
C. A routine sample
D. A bacterial-solids sample - ANSWERS-B. A weighted
composite
Settleable solids by volume are determined through the use
of
