1
ENMT 3) Which of the following statements are correct about hydraulic systems? (Check all that apply.) (3
points)
Always incorporate the use of pumps. The main force for hydrostatic pressure is our atmosphere The hydrostatic pressure is the same throughout a given area defined by height of water
column When you want SI units of pressure, you use the equation P = 0.43 x h
4) Which statement(s) is/are correct about any given water flow rate in closed pipes? (1 point)
The velocity of flow is inversely proportional to the area of flow The velocity of flow is inversely proportional to the diameter of pipes carrying the water The calculations for water flow assume water is a compressible fluid The flow rate can be expressed in ML/day. 5) Please examine the picture above and check all the correct statements about the figure: (3 points) 2 It is a schematic of soil vapor extraction It is a schematic of air sparging Pressurized air is injected into saturated zone at controlled pressures and volumes to
force out volatile contaminants It oxidizes contaminants to carbon dioxide and water 6) Please check all correct statements about the figure above: (3 points) The solids on top are due to eutrophication 3 It is part of primary sewage treatment It is part of secondary sewage treatment We must continually bring in oxygen into the aerobic zone so that bacteria can
metabolize carbon compounds into carbon dioxide and water 7) Remediation and control of radon in homes include: (3 points) Air stripping Seal all floor cracks and joints to prevent radon entry Ventilation inside of the home Subslab ventilation 8) In general, three primary considerations in designing an effective control strategy in an industrial
setting are: (3 points) environmental factors, systemic factors, and economic factors environmental factors, ethical factors, and economic factors environmental factors, engineering factors, and geopolitical factors environmental factors, engineering factors, and economic factors 9) What statement(s) is (are) correct about the figure above? (3 points) 4 It represents plans for water distribution Pipe placement takes advantage of gravity It is a gridiron system Pumps are appropriately placed to minimize fluctuations in pressure 10) Which of the following are techniques that can be used to analyze gases, if the gases can be brought
into solution? (3 points) Electrostatic precipitators Activated carbon adsorption Infrared absorption Colorimetry High-volume sampler 5
11) Which of the following options, the US EPA encourages or can be successfully used as an integrated
waste management strategy for all waste streams? (3 points) recycling reducing use of materials open burning at abandoned backyards source reduction composting landfilling/disposal 12) Sources of industrial hazardous waste generation can be roughly divided into: (3 points) Large-quantity generators Sewage Small-quantity generators Block of lead Conditionally exempt small-quantity generators 13) 6 Which of the following statements are correct about the figure above? (1 point) It shows three leachate collection zones It is a schematic of a leachate collection system for a secure landfill. It is a schematic of a leachate collection system for a sanitary landfill. The compacted clay liner helps to collect leachate. 14) Please fill in each sentence with the most appropriate word or phrase (15 points). ______ is typically accomplished by
bringing gases in contact with various
aqueous solutions. 1. Absorption 2. Adsorption
The solubility of gases ______ as the
temperature of water increases.
3. ARARs
Manning’s formula is based
upon _______ flow. 4. Bacteria
5. If you are given the mass of compound X
and you need to determine the volume that BOD 7 mass will take up, you will need to find
the _______ of compound X. _______ occurs when molecules are
physically attracted to surfaces and
essentially sit on top of surfaces. 6. CO2 7. CO, hydrocarbons, and PCBs
Water pollution control project typically use
the ________ flow for design computations
of drought flow. The most common technology for capturing
sulfur dioxide emissions is ________. To determine how flow velocity changes
when pipe size changes, we use the concept
of continuity of flow. This concept applies
to all liquids that are ____________. Most _______ are not pathogenic, but its
presence is used to indicate the presence of
possible pathogens. 8. Coliforms 9. Aeration 10
Compressible
. 11. Decrease 12
Denitrofication
. 13
Density
.
________ is a physical parameter is water
that can interfere with disinfection processes
and harbor microorganisms. The dominant product (resulting molecule)
of incineration is______ (for complete
combustion). Activated sludge and/or trickling filters are
the most widely used technologies to achieve
___________ treatment. _______ a measure of the amount of oxygen
required to aerobically decompose organic
matter in the water. For a region of the world that has very cold
winters and hot summers, you would most
likely use ______ as sewer pipe materials. 14
DO
. 15
Flue gas desulfurization
. 16
Incompressible
. 17
Increase
. 18
Land disposal
. 19
Leachate
. 8 20
Larger
. 21
MA7CD10
. 22
Molecular mass
. 23
Mole
. 24
NPDES
. 25
Nonuniform open channel
. Sampling frequencies and locations are
stipulated in the _____ permit for wastewater
effluent standards. 26
Open channel
. 27
PVC
.
A physical process that can remediate both
solid waste and hazardous waste
is ________. This is also the least desirable
of all possible waste remediation options,
both for solid wastes and for hazardous
wastes. 28
Perc test
. 29
Primary
. 30
Reinforced concrete pipe
. 31
Secondary
. 32
Sheet
. 33
Smaller
. 34
Settled particles
. 35
Syngas
. 9 36
Temperature
. 37
Tertiary
. 38
Turbidity
. 39
Viruses
. 40
Volume
. 15) A solid waste becomes hazardous waste when the waste is listed on one of the four RCRA hazardous
waste lists (F, K, P and U lists) published in the Code of Federal Regulations (40 CFR 261) or possesses
at least one of the following characteristics: (Select all that apply!) (3 points) Corrosivity Reactivity Ignitability Toxicity 16) The removal efficiency of an electrostatic precipitator (ESP) can be expressed mathematically as: (3
points)
E = 100 * (1-e-wA/Q)
Where E = percent removal efficiency
e = base of natural logarithm, equal to 2.718
w = effective drift velocity
A = total surface area of plates
Q = gas flow rate through the unit 10
From the equation above, which of the following statements can be directly concluded? The gas flow rate must be slow and uniform across each plate to obtain high removal
efficiencies. The removal efficiency will increase proportionately with increasing surface area of the
electrostatic plates Doubling the drift velocity will cut the efficiency by half Increasing drift velocity will increase efficiency, but there is a physical limit to this as we
need to maintain constant drift velocity 17) Check all correct statements about wet scrubbers (3 points) Scrubbers remove gases and vapors through adsorption Scrubber liquids can react with some off-gas components Scrubber are capable of removing particulates as well as gases and vapors Scrubbers have low capital costs and low maintenance cost 18) Which of these are important factors to consider when determining if soil vapor extraction is
appropriate for soil remediation of a hazardous waste spill? Check all that apply. (3 points) Contaminants in the air Soil type 11 Melting point of hazardous waste Henry’s constants of chemicals in hazardous waste Vapor pressure of chemicals in hazardous waste 19) Which of the following are viable remediation options for soil heavily contaminated with lead and
arsenic? [Please do not consider costs or practicality. Just what the technology is capable of doing.] (3
points) Soil vapor extraction Soil washing Solidification Vitrification 20) Which of the following can be used for hazardous waste treatment? (3 points) Ion exchange Composting Incineration Bioremediation Solidification 12
21) Open channel flow is characteristic of flow in storm and sanitary sewers, streams, rivers, and canals.
____________ is typically used to analyze open channel flow systems. Check all that apply. (3 points) Hazen-Williams Nomograph Hazen-Williams Equation Manning’s Formula Darcy’s Law 22) Technologies to mitigate CO emissions include which of the following? Check all correct answers. (3
points) Increasing oxidation potential in off gas systems Flocculation & filtration Electrostatic precipitators Catalytic converters Precipitation 23) Noise pollution control technologies and personal protective equipment include which of the
following? Check all correct answers. (3 points) Wave cancelling headphones Zoning laws Insulation around the source of noise 13 Off-gas systems 24) Match the word (s) or concept(s) with the appropriate phrase. (3 points) _____ are emitted directly into the air
from a specific source such as a power
plant. 1
Carbon dioxide
. 2
Benzene
.
_____ plays an important role with
regards to atmospheric chemistry in both
the troposphere and the stratosphere. _______ is an example of a toxic air
pollutant. 3
Primary pollutants
. 4
Ozone
. 25) Please place the appropriate key word or phrase into the sentence that best describes it. Note that there are more key words
and phrases than there are sentences. ( 7 points) ____________ is a pipe, channel, or
chimney from which pollutants are
discharged directly into a body of water or
the air. 1. Abiotic 2. Absorption
_____________ are very important since
they recycle all molecules and atoms in
nature, allowing all wastes to be used by
another species. 3. abiotic 4. adsorption
________ is the destruction of diseasecausing microbes in water or sewage
effluent, usually by the addition of chlorine,
ozone, or UV radiation. ___________ is the pressure exerted by the
vapor of a compound in equilibrium with the
compound's pure phase at a given
temperature. 5. advanced treatment 6. acidity 7. biogeochemical cycles ______________is a biological process for 14 8. Composting 9. Disinfection treating garbage and/or sewage sludge,
involving aerobic decomposition of organic
waste under controlled conditions. 10
Point source
. 11. precipitation
______ is a purification process used after
secondary treatment aimed primarily at
removing nutrients (i.e., nitrogen and
phosphorus). It is also known as tertiary
treatment. The ____________ is the maximum
concentration of a substance that will
dissolve in water at a given temperature. 12
redox
. 13
significant figures
. 14
Vapor Pressure
. 15
Volatilization
. 16
Water solubility
. 26) Which of the following statements are correct about the following equation: Qin = Qout? (1 point) It is correct for all fluids It is called the continuity equation The consequence of Q1 = Q2 is also that A1 × V1 = A2 × V2 The consequence of Q1 = Q2 is also the doubling of velocity with the doubling of
pipe diameter.
27) Please fill in the blanks with the appropriate key word or phrase. Note that there are more key words and
phrases than needed for this exercise. (7 pts) 15 1. Activated carbon 2. Aeration 3. Asbestos cement A _____ network of pipes where water can
circulate in interconnected loops, is the
preferred pipeline layout. 4. Branched 5. Comminutor
The optimum coagulant dose is usually
determined in the laboratory using a
_______________. Pipelines that carry both stormwater and
sewage are called ______________. ________ are underground structures that
provide access to cleaning, repair, sampling,
and flow measurements of pipelines. 6. Combined sewers 7. Composite sample 8. Ductile iron pipe 9. Gridiron
_________ is a mechanical cutting or
shredding device often used for preliminary
treatment of sewage. _____________are not enforceable and are
used as guidelines or suggestions. _____________ is a water or wastewater
sample obtained by mixing individual grab
samples taken at regular time intervals over
the sampling period. 10
Grouting
. 11. Infiltration 12
Jar test
. 13
Leakage
. 14
Lining
. 15
Manholes
. 16
Manning’s nomograph
. 16 17
Primary MCL
. 18
Sanitary sewage
. 19
Secondary standards
. 28) Which of these conditions are likely to increase BOD? (Check all that apply.) (2 pts) Heat Increased calcium content Increased plant nutrients increased amounts of U-238 Increased organics

 

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