WorksheetsWastewater Operator-Round 1
Total questions: 25
Worksheet time: 19mins
Name
Class
Date
1.
Fresh domestic untreated or raw wastewater typically has a pH rang of:
a)
3-5
b)
5-7
c)
6.5-8
d)
8.5-10
2.
Lower soluble BOD levels are a result of organic sources in the influent such as domestic contributors and industrial contributors:
a)
True
b)
False
3.
An example of inorganic contaminants include:
a)
Hepatituis
b)
Dysentary
c)
Polio
d)
Copper
4.
The main standard for expressing Total Solids is:
a)
Microliters
b)
PPM
c)
Percent
d)
pH
5.
Total Solids include:
a)
Total dissolved solids & suspended solids
b)
Only suspended solids
c)
Only total dissolved solids
d)
Only nonsettleable and settleable materials.
6.
Cold water can retain higher dissolved oxygen content than warm water:
a)
True
b)
False
7.
Important nutrients in wastewater include:
a)
Hepatitis & Polio
b)
Nitrogen & Phosphorus
c)
Total Solids & pH
d)
There are no important nutrients in wastewater.
8.
Untreated wastewater discharge can create which of the following:
a)
High Chlorine levels in the receiving stream
b)
Oxygen depletion in the receiving stream
c)
Sludge and scum accumulations
d)
Low odor production in the stream.
9.
Hydrogen sulfide gives off an odor similar to:
a)
Ammonia Gas
b)
Chlorine Gas
c)
Rotten Eggs
d)
A Burning Fire
10.
Typical components of a collection system include:
a)
Manholes
b)
Pumping Stations
c)
Sewers and Force Mains
d)
All of the Answers
11.
What is the name of the treatment process that removes rags, sticks, and other debris?
a)
Sedimentation
b)
Disposal
c)
Screening
d)
Disinfection
12.
Parshall Flume, weirs, and Kennison nozzles are all examples of:
a)
Ways to measure BOD
b)
Ways to measure pH
c)
Ways to measure sludge depth
d)
Ways to measure flow
13.
Primary treatment is a physical treatment process that takes place in a tank and allows substances to settle or float and be separated from the water being treated.
a)
True
b)
False
14.
What is the treatment process used to remove dissolved and suspended organic materials from the water being treated?
a)
Secondary Treatment
b)
Chlorination
c)
Primary Treatment
d)
Digestion
15.
What kind of matter is used by bacteria as a food source for producing new cells?
a)
Chlorine
b)
Debris from grit channels
c)
Biodegradable organic matter
d)
Biodegradable inorganic matter
16.
A shallow pond designed to operate in the absence of dissolved oxygen:
a)
Aerobic pond
b)
Anaerobic pond
c)
Facultative pond
d)
Aerate pond
17.
The purpose of disinfection is to kill or inactivate pathogenic organisms in the treated effluent prior to discharging to the receiving streams.
a)
True
b)
False
18.
What is commonly added to sludge to raise the pH to 12.0 or higher er?
a)
Chlorine
b)
Lime
c)
Sulfuric Acid
d)
No chemical is added because the pH of the sludge should be below 4.0
19.
What does NPDES stand for:
a)
National Pollutant Decrease Elimination System
b)
National Pretreatment Discharge Elimination System
c)
National Permit Discharge Elimination System
d)
National Pollutant Discharge Elimination System
20.
Examples of receiving waters would be:
a)
WWTP
b)
Aeration Tanks
c)
River or Stream
d)
Combined Sewer Overflow
21.
MGD Stands for:
a)
Mega Gallons Discharged
b)
Million Gallons Discharged
c)
Mega Gallons per Day
d)
Million Gallons per Day
22.
What calculation would you use to calculate loadings ( pounds per day)?
a)
Mass / Load
b)
MGD X mg/l
c)
Gallons X mg/l
d)
MGD X mg/l x 8.34
23.
All applicants for certification or recertification must be accompanied by a criminal history record.
a)
True
b)
False
24.
SOPs are good for tasks that do not require data interpretation or judgment such as preparing the DMR report.
a)
True
b)
False
25.
DMRs are reports that contain self monitoring results for what kind of permit?
a)
NPDES permits
b)
Water Quality Management Permits
c)
NPDES & Water Quality Management Permits
100 %
