WASTEWATER
WASTEWATER EXAM QUESTIONS AND ANSWERS GUARANTEED
SUCCESS.
The term pathogenic means Answer >>>> Capable of causing disease
Question: The minimum separation, between sewer lines, and potable water lines
is
A. 8 feet
B. 9 feet
C. 10 feet Answer >>>> B. 9 feet
An important step, in testing a sample, for Total Suspended Solids is Answer >>>>
Filtering a sample
Biochemical oxygen Demand, (BOD) test is based on? Answer >>>> Measuring,
the dissolved oxygen, used
Results, of Biochemical Oxygen Demand, (BOD) sample, taken at a treatment
plant, tells the operator Answer >>>> How the plant, was operating, 5 days ago
Question: Which of the following are dangerous gasses that are likely to be
present in lift stations and manholes Answer >>>> Natural gas, gasoline fumes,
hydrogen sulfide, and carbon dioxide
,WASTEWATER
Question: What is the preferred, hydraulic method of cleaning sewer lines Answer
>>>> Answers: Hydro Jet Cleaning
Question: what are some Ways, to reduce bad odors, generated in the collection
system Answer >>>> Answer:
Routinely cleaning, slow running, or low flow lines,
adding chlorine, or hydrogen peroxide, to the collection system
Question: what are some Types of pipe materials commonly found in wastewater
collection system Answer >>>> Answer: ductile iron, Poly Vinyl Chloride, (PVC)
vitrified clay pipe, fiberglass
Question: before entering a confined space, a worker should perform, what
procedures Answer >>>> Answer: have an approved monitoring device, and
check, for the presence of dangerous gasses, ventilate, the space with a blower,
wear a safety harness, and be attach to a life line
A properly designed, and operated primary sedimentation tank, should remove
what percent of incoming BOD.
A.20% to 30%
B. 25 % to 50%
C. 30% to 40% Answer >>>> C. 30 to 40%
What Devices, can be used, to determine, the level of sewage, in a lift station
Answer >>>> Answer: air bubbler, floats, electrodes, Acoustic (sonic), radar
, WASTEWATER
What, is the most important role, of aerobic bacteria, in the treatment, of
wastewater? Answer >>>> decomposition, of organic matter
Question: How is the hydraulic loading, of a trickling filter, determined Answer
>>>> Answer: flow rate, and filter area
Question: what equipment, or methods, can be used, to dewater sludge Answer
>>>> Answer: belt press, drying beds, solid bowl, centrifuge, gravity thickener
Question: what are the Most important factors, to providing adequate sewage
treatment, in a stabilization pond Answer >>>> Answer: sunlight, algae, bacteria
and, time
Question: what do Offensive, and objectionable odors, in a trickling filter, usually
indicate Answer >>>> Answer: septic conditions exist
Question: Dissolved Oxygen, (DO) in an activated sludge, aeration tank, should be
maintained in What Range Answer >>>> Answer: 2, to 4, milligram, per liter
Question: what factors Contribute to infiltration in a collection system Answer
>>>> Answer: breaks in the main lines, high ground water levels, heavy rains,
hydro jet cleaning, of plugged mains
Question: what happen When a centrifugal pump loses prime Answer >>>>
Answer: it is no longer moving liquid
WASTEWATER EXAM QUESTIONS AND ANSWERS GUARANTEED
SUCCESS.
The term pathogenic means Answer >>>> Capable of causing disease
Question: The minimum separation, between sewer lines, and potable water lines
is
A. 8 feet
B. 9 feet
C. 10 feet Answer >>>> B. 9 feet
An important step, in testing a sample, for Total Suspended Solids is Answer >>>>
Filtering a sample
Biochemical oxygen Demand, (BOD) test is based on? Answer >>>> Measuring,
the dissolved oxygen, used
Results, of Biochemical Oxygen Demand, (BOD) sample, taken at a treatment
plant, tells the operator Answer >>>> How the plant, was operating, 5 days ago
Question: Which of the following are dangerous gasses that are likely to be
present in lift stations and manholes Answer >>>> Natural gas, gasoline fumes,
hydrogen sulfide, and carbon dioxide
,WASTEWATER
Question: What is the preferred, hydraulic method of cleaning sewer lines Answer
>>>> Answers: Hydro Jet Cleaning
Question: what are some Ways, to reduce bad odors, generated in the collection
system Answer >>>> Answer:
Routinely cleaning, slow running, or low flow lines,
adding chlorine, or hydrogen peroxide, to the collection system
Question: what are some Types of pipe materials commonly found in wastewater
collection system Answer >>>> Answer: ductile iron, Poly Vinyl Chloride, (PVC)
vitrified clay pipe, fiberglass
Question: before entering a confined space, a worker should perform, what
procedures Answer >>>> Answer: have an approved monitoring device, and
check, for the presence of dangerous gasses, ventilate, the space with a blower,
wear a safety harness, and be attach to a life line
A properly designed, and operated primary sedimentation tank, should remove
what percent of incoming BOD.
A.20% to 30%
B. 25 % to 50%
C. 30% to 40% Answer >>>> C. 30 to 40%
What Devices, can be used, to determine, the level of sewage, in a lift station
Answer >>>> Answer: air bubbler, floats, electrodes, Acoustic (sonic), radar
, WASTEWATER
What, is the most important role, of aerobic bacteria, in the treatment, of
wastewater? Answer >>>> decomposition, of organic matter
Question: How is the hydraulic loading, of a trickling filter, determined Answer
>>>> Answer: flow rate, and filter area
Question: what equipment, or methods, can be used, to dewater sludge Answer
>>>> Answer: belt press, drying beds, solid bowl, centrifuge, gravity thickener
Question: what are the Most important factors, to providing adequate sewage
treatment, in a stabilization pond Answer >>>> Answer: sunlight, algae, bacteria
and, time
Question: what do Offensive, and objectionable odors, in a trickling filter, usually
indicate Answer >>>> Answer: septic conditions exist
Question: Dissolved Oxygen, (DO) in an activated sludge, aeration tank, should be
maintained in What Range Answer >>>> Answer: 2, to 4, milligram, per liter
Question: what factors Contribute to infiltration in a collection system Answer
>>>> Answer: breaks in the main lines, high ground water levels, heavy rains,
hydro jet cleaning, of plugged mains
Question: what happen When a centrifugal pump loses prime Answer >>>>
Answer: it is no longer moving liquid
