texas wastewater class b newest actual exam comple
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TEXAS WASTEWATER CLASS B
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TEXAS WASTEWATER CLASS B NEWEST ACTUAL EXAM
COMPLETE 190 QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
1. During heavy rain it is possible that manholes and lift stations may
overflow, discharge waste materials into roadways or ditches. This type of
discharge (SSO) would be: considered an unavoidable discharge, a
violation of the Texas Water Code, a bypass that must be reported
within 24 hours and considered a health hazard
2. An effective way for the collection system worker to prevent infection by
waterborn pathogenic organism is to: Wear protective clothing and avoid
direct contact with waste water
3. will increase the chances that sewage will turn septic:
Stop- pages in the main line
4. Extensive use of garbage disposals (grinders) in a community would
likely have the following effect on the collection system: Increase the
amount of flow, solids, and grease
5.The name of the State Agency responsible for enforcing pollution
control laws in Texas: Texas Commission of Environmental Quality
6.The term pathogenic means: Capable of causing disease
7.The minimum separation between sewer lines and potable water lines is:
9 feet
8.A licensed wastewater operator is a professional: consistently does best
job possible, practices personal safety, strives to improve job
knowledge, strives to keep the plant and collection system in the best
appearance and working order
9.An important step in testing a sample for Total Suspended Solids is:
Filtering a sample
10. The Biochemical oxygen Demand (BOD) of a sample is based on:
Measuring the dissolved oxygen (DO) used
11. The results of Biochemical Oxygen Demand (BOD) sample taken at a
treat- ment plant tells the operator: How the plant was operating 5 days
ago
12. Which of the following are dangerous gasses that are likely to be
present in lift stations and manholes?: Natural gas, gasoline fumes,
hydrogen sulfide and carbon dioxide
13. A preferred hydraulic method of cleaning sewer lines is: Hydro Jet
Cleaner
,14.Ways to reduce bad odors coming from a collection system: routinely
cleaning slow running or low flow lines, adding chlorine or hydrogen
peroxide to the collection system
15.Types of pipe that are commonly used in wastewater collection system: -
ductile iron, Poly Vinyl Chloride (PVC)
16.Before entering a confined space a worker should: Use approved
monitoring device and check for the presence of dangerous gasses,
ventilate the space with a blower, wear a safety harness and attach a
life line
17.A properly designed and operated primary sedimentation tank
should remove percent of incoming BOD: 30-40%
18.Devices that may be used to determine the level of sewage in a lift station
: air bubbler, floats, electrodes, Acoustic (sonic)
19.What is the most important role of aerobic bacteria in the treatment
of wastewater?: decompose organic matter
20.The hydraulic loading of a trickling filter may be determined by: flow
rate and filter area
21.These can be used to dewater sludge: belt press, drying beds, solid
bowl centrifuge, gravity thickener
22.Most important to providing adequate sewage treatment in a
stabilization pond: sunlight, algae, bacteria and time
23. In the activated sludge system, if the operator observed Boiling action,
Violent turbulence throughout the aeration tank surface, Large air bubbles
1/2 inch or greater, the operator would suspect-: Over aeration resulting in
high DO and or floc shearing therefore the operator should reduce the
air SCFM to get DO into the proper range
24. In the activated sludge system if the operator observed uneven surface
aeration, dead spots or inadequate mixing in some areas, the operator
would suspect: Plugged diffusers
25. In the activated sludge system, if the operator observes white thick
billow- ing sudsy foam on the aeration tank, the operator would suspect:
Overloaded aeration tank and or excessive sludge wasting
In the activated sludge system, if the operator observes excessive air being
used with no apparent change in organic or hydraulic loading, the operator
would suspect: Leaks in the system piping, Plugged air diffusers & High
organic loading
, 26.Offensive and objectionable odors which sometimes occur in
trickling filters usually indicate: septic conditions are present
27. Dissolved Oxygen (DO) in aeration tank of an activated sludge plant
should be maintained at or about: 2 to 4 mg/L
28. Contributes to the infiltration in a collection system: breaks in the main
lines, high ground water levels, heavy rains, hydro jet cleaning plugged
mains
29.When a centrifuge pump loses prime the: pump is no longer moving
liquid
30.A Rotating Biological Contactor (RBC) is: fixed firm biological
treatment process
31.Needs to be checked regularly to properly operate an activated
sludge treatment plant: aeration equipment and mixed liquor solids
32.Point source discharges are: discharges that come from pipes or
ditches that are monitored, controlled and inspected
33.Non-point discharges are: discharges that have intermittent,
dispersed flows having little or no control
34.The Texas Water Code establishes the protection of water quality and
quantity of the state by: setting stream standards, issues permits for
discharges, identifies non-point source controls, and establishes water
reuse.
35.The wastewater plant operator is primarily responsible for: treating
waste- water discharged into the community
36.Chapter of the Texas Water Code is the state law controlling water
pollution and authority to control discharges in Texas: Chapter 26
and Texas Commission of Environmental Quality
37.The Texas Commission on Environmental Quality can revoke an
operator's license if the operator: causes permit violation, falsifies records
or neglects their duty
38.If accidental discharge, bypass, or spill (SSO) of wastewater occurs
the responsible party MUST notify TCEQ regional offices within__hours:
24
39.Aerobic Bacteria require in the water for their metabolism: oxygen
40.Anaerobic Bacteria live with O2 present in the water for their
metab- olism: cannot
41.Facultative Bacteria require in the water for their metabolism:
either aerobic or anaerobic conditions
42.Chemical characteristics of sewage include: solids, greases, dissolved
oxy- gen, O2 Demand, pH, and gasses
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