Wastewater Operator (class 1)
Study online at https://quizlet.com/_1bl1kk
1. What is the most common reason for a wastewater Storm events
to contain intermittent large amounts of sand, gravel,
and grit?
2. Combined wastewater is defined as Sanitary wastewater and
stormwater runoff
3. In general, the solids content in wastewater is about 0.1%
4. In general, what is the percentage of suspended solids 30%
in the total amount of solids?
5. Generally, the percentage of dissolved solids in the 70%
amount of total solids is about
6. Which type of organisms would most probably be as- Amoebas
sociated with poor treatment or young biomass?
7. Which type of organisms would most probably be as- Stalked Ciliates
sociated with very clear plant effluent, low biochemical
oxygen demand (BOD), and low amounts of suspend-
ed solids?
8. Aerobic bacteria will reproduce and live in an environ- Oxygen
ment that contains only
9. Anaerobic bacteria will reproduce and live only in an Free or dissolved oxygen
environment that completely lacks (DO)
10. The biochemical oxygen demand (*BOD) test usually 5 days
has a specific time of
11. An Imhoff cone measures Volume of settleable solids
1/2
Study online at https://quizlet.com/_1bl1kk
1. What is the most common reason for a wastewater Storm events
to contain intermittent large amounts of sand, gravel,
and grit?
2. Combined wastewater is defined as Sanitary wastewater and
stormwater runoff
3. In general, the solids content in wastewater is about 0.1%
4. In general, what is the percentage of suspended solids 30%
in the total amount of solids?
5. Generally, the percentage of dissolved solids in the 70%
amount of total solids is about
6. Which type of organisms would most probably be as- Amoebas
sociated with poor treatment or young biomass?
7. Which type of organisms would most probably be as- Stalked Ciliates
sociated with very clear plant effluent, low biochemical
oxygen demand (BOD), and low amounts of suspend-
ed solids?
8. Aerobic bacteria will reproduce and live in an environ- Oxygen
ment that contains only
9. Anaerobic bacteria will reproduce and live only in an Free or dissolved oxygen
environment that completely lacks (DO)
10. The biochemical oxygen demand (*BOD) test usually 5 days
has a specific time of
11. An Imhoff cone measures Volume of settleable solids
1/2
