ABC Wastewater Level 3 - Lab
To have significant meaning for laboratory tests of the D. Proportional composite sampling
evaluation of a wastewater treatment plant's performance
the best method of sampling is
A. Grab sampling
B.Hourly sampling
C. Sampling during peak flow
D.Proportional composite sampling
E. Automatic sampling
BOD samples should be collected before chlorination B. Chlorine interferes with the activity of organisms
because
A. Chlorine reacts with the buffer solution
B. Chlorine interferes with the activity of organisms
C. Chlorine reacts with the calcium ions
D. Chlorine affects the alkalinity
A water sample is "fixed" in the field by C. Adding chemicals to prevent the changing of water quality
A. Keeping the sample in a Cipolletti device
B. Anchoring the container to the stream bed
C. Adding chemicals to prevent the changing of water
quality
D. Maintaining a constant sample temperature of 95° F
The best procedure for determining the SS of a plant A. A 24-hr composite sample of the effluent
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
, A sample obtained by taking portions of wastewater at a B. A weighted composite
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
Settleable solids by volume are determined through the D. An Imhoff cone
use of
A. A Nessler tube
B. A Kjeldahl flask
C. A Gooch crucible
D. An Imhoff cone
The settleable solids test is primarily used to A. Measure the volume of solids that may be removed by settling tanks
A. Measure the volume of solids that may be removed by
settling tanks
B. Determine the BOD required for treatment
C. Measure the rate of decomposition of organic volatile
solids
D. Determine the amount of chlorine required
The standard total SS test requires the Gooch crucible B. 103° C
fiber glass mat and solids to be dried in the oven at
A. 95° C
B. 103° C
C. 110° C
D. 115.5° C
The SS content of wastewater is most accurately A. Filtering the sample through a specially prepared filter; drying the filter and
measured by material retained on it in an oven at 103° C; weighing the filter; and determining its
A. Filtering the sample through a specially prepared filter; added weight caused by the solids retained
drying the filter and material retained on it in an oven
at 103° C; weighing the filter; and determining its added
weight caused by the solids retained
B. Evaporating the sample and weighing the residue
C. Centrifuging the sample and measuring the volume of
solids separated from the liquid
D. Distilling the sample after acidification with sulfuric acid
and titrating the distillate with N sodium hydroxide
The amount of sample to be used in determining SS B. Amount of SS in the sample
depends on the
A. Amount of grease in the sample
B. Amount of SS in the sample
C. Degree of turbidity of the sample
D. Type of vacuum apparatus available
To have significant meaning for laboratory tests of the D. Proportional composite sampling
evaluation of a wastewater treatment plant's performance
the best method of sampling is
A. Grab sampling
B.Hourly sampling
C. Sampling during peak flow
D.Proportional composite sampling
E. Automatic sampling
BOD samples should be collected before chlorination B. Chlorine interferes with the activity of organisms
because
A. Chlorine reacts with the buffer solution
B. Chlorine interferes with the activity of organisms
C. Chlorine reacts with the calcium ions
D. Chlorine affects the alkalinity
A water sample is "fixed" in the field by C. Adding chemicals to prevent the changing of water quality
A. Keeping the sample in a Cipolletti device
B. Anchoring the container to the stream bed
C. Adding chemicals to prevent the changing of water
quality
D. Maintaining a constant sample temperature of 95° F
The best procedure for determining the SS of a plant A. A 24-hr composite sample of the effluent
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
, A sample obtained by taking portions of wastewater at a B. A weighted composite
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
Settleable solids by volume are determined through the D. An Imhoff cone
use of
A. A Nessler tube
B. A Kjeldahl flask
C. A Gooch crucible
D. An Imhoff cone
The settleable solids test is primarily used to A. Measure the volume of solids that may be removed by settling tanks
A. Measure the volume of solids that may be removed by
settling tanks
B. Determine the BOD required for treatment
C. Measure the rate of decomposition of organic volatile
solids
D. Determine the amount of chlorine required
The standard total SS test requires the Gooch crucible B. 103° C
fiber glass mat and solids to be dried in the oven at
A. 95° C
B. 103° C
C. 110° C
D. 115.5° C
The SS content of wastewater is most accurately A. Filtering the sample through a specially prepared filter; drying the filter and
measured by material retained on it in an oven at 103° C; weighing the filter; and determining its
A. Filtering the sample through a specially prepared filter; added weight caused by the solids retained
drying the filter and material retained on it in an oven
at 103° C; weighing the filter; and determining its added
weight caused by the solids retained
B. Evaporating the sample and weighing the residue
C. Centrifuging the sample and measuring the volume of
solids separated from the liquid
D. Distilling the sample after acidification with sulfuric acid
and titrating the distillate with N sodium hydroxide
The amount of sample to be used in determining SS B. Amount of SS in the sample
depends on the
A. Amount of grease in the sample
B. Amount of SS in the sample
C. Degree of turbidity of the sample
D. Type of vacuum apparatus available
