ABC Wastewater Level 3 – Lab
Questions And Correct Answers
To have significant meaning for laboratory tests of the 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
D. Proportional composite sampling
BOD samples should be collected before chlorination 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
B. Chlorine interferes with the activity of organisms
A water sample is "fixed" in the field by
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
C. Adding chemicals to prevent the changing of water quality
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
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
B. A weighted composite
Settleable solids by volume are determined through the use of
, A. A Nessler tube
B. A Kjeldahl flask
C. A Gooch crucible
D. An Imhoff cone
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
B. Determine the BOD required for treatment
C. Measure the rate of decomposition of organic volatile solids
D. Determine the amount of chlorine required
A. Measure the volume of solids that may be removed by settling tanks
The standard total SS test requires the Gooch crucible 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
B. 103° C
Questions And Correct Answers
To have significant meaning for laboratory tests of the 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
D. Proportional composite sampling
BOD samples should be collected before chlorination 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
B. Chlorine interferes with the activity of organisms
A water sample is "fixed" in the field by
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
C. Adding chemicals to prevent the changing of water quality
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
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
B. A weighted composite
Settleable solids by volume are determined through the use of
, A. A Nessler tube
B. A Kjeldahl flask
C. A Gooch crucible
D. An Imhoff cone
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
B. Determine the BOD required for treatment
C. Measure the rate of decomposition of organic volatile solids
D. Determine the amount of chlorine required
A. Measure the volume of solids that may be removed by settling tanks
The standard total SS test requires the Gooch crucible 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
B. 103° C
