Q2_ENVI

What treatments can be done under tertiary treatment? = all of the above

It is a physical water quality parameter that is caused by dissolved organics (phenols, chlorophenols) & inorganic chemicals & organisms, or due to decaying micro-organisms or algae or due to high concentrations of salts such as Ca+2, Mg+2, Cl- and this parameter is difficult to measure (subjective). =TDS XXXXXXXX

The ultimate BOD of the waste generated from a plant is 280 mg/L. What is the five-day BOD if the deoxygenation constant k is 0.08 d-1 ? = 126.33mg/L XXXXX

_______ is excessive concentrations of particular substances for sufficient

periods of time to cause identifiable effects. = Surface Water Pollution

What treatment of leachate is used by the sanitary landfill we visited? = Aerobic

It is an underground zone or body of earth material from which groundwater can be obtained from a well at a useful rate. =aquifer

Which of the following pollutants deplete oxygen in water in their decomposition into simpler substances? = organics

It is the study of the physical, chemical & biological characteristics of rivers & lakes. = water quality XXXXXX

The company you work for plans to release a waste stream found to contain 7.0 mg/L of benzaldehyde (C7H6O) and 5 mg/L of NH3-N. Calculate the theoretical oxygen demand of this waste stream (in mg/L). = 39.76

It is due to dissolved ions in solutions that conducts electricity and it is the measure of the ability of an aqueous solution to carry an electric current. = conductivity

It is the outflow from a sewage treatment plant. =effluent

Which of the following pollutants indicate high BOD? = nutrients xxxxxxxxxxx

According to Philippine Clean Water Act (RA9275), all industrial plants are required to have a wastewater treatment plant. = true

Which of the following water quality parameter is affected by power plants? =

Microorganisms that require oxygen in decomposing organic materials. = Aerobic

130 ppm of BOD effluent is not acceptable from an industry with an influent of 3,000 to 10,000 ppm BOD. = False

Which of the following agencies monitor water quality if it complies with Philippine National Standard for Drinking Water (PNSDW)?

= DPHW XXXXX

It is the measure of its acid neutralizing capacity (ANC) or buffering. = Alkalinity

The DO should not drop to 5 mg/L, for the existence and persistence of aquatic lives. = true

It is a biological property of water that refers to the non-pathogenic bacteria present in the intestines and its numbers indicate contamination. = total coliform

It is when the water is pumped from an aquifer; the water table is depressed around the well. = cone of depression

Which government agency issues water permit to deep wells to be installed? = National Water Resources Board (NWRB)

It is a model that balances the inputs, outputs and storage of water in a system. = water budget

Which government agency regulates water utilities in the Philippines regardless of source, surface or ground water? = Local Water Utilities Administration (LWUA) XXXXX

It is the amount of dissolved oxygen used-up by microorganism to break up organic materials in water at 20 oC over a period of 5 days.

=

BOD5

The laboratory testing for water and wastewater samples is done at standard temperature of 20oC. = False

The rate of which oxygen is consumed is directly proportional to the concentration of degradable organic matter remaining at any time t. = true

It is the occurrence of rapid vertical change in temperature w/ development of stratification. =

It is used as coagulant and to depress the pH. = alum or Al2(SO4)3

Which of the following water quality parameters is NOT monitored on a daily basis in a water treatment plant? = turbidity XXXXXXXX

Which of the following is NOT a characterization of water quality? =physiological

What is the basis of choosing the filtration method to be used in water treatment? = size of the particles to be filtered

It is one of the major tools of water quality management in rivers to access the capability of a stream to absorb waste load. = DO Sag Curve

it is a biological property of water that refers to the non-pathogenic bacteria present in the intestines and its numbers indicate contamination = total coliform

It is used to facilitate easier drying of sludge prior to disposal without using open dry bed. = Sludge drying bed XXXXXX

The pH of acidic rain water is 3. = true

As the amount of wastes decreases in water, the DO level decreases. = False

Which among these physical methods of treating wastewater is the best method if volatile substances are dissolved in the water? = flotation and skimming XXXXXXX

It is the circulation of water from the oceans to the atmosphere and back to the oceans by way of evaporation, runoff from streams and rivers, and groundwater flow. = water cycle

Sedimentation or clarification is _______ method of treating water. =chemical XXXXXX

It is the circulation of water from the oceans to the atmosphere and back to the oceans by way of evaporation, runoff from streams and rivers, and groundwater flow. = hydrologic cycle pat

130 ppm of BOD effluent is not acceptable from an industry with an influent of 3,000 to 10,000 ppm BOD. = false

It is an attached cell/biofilm process (biological treatment) where solid disks with attached biofilms rotate on a horizontal axis to alternately contact the waste stream and the atmosphere. = rotating biological contractor

It is the natural process whereby waters emerge from their stream channel to cover part of the floodplain. = flooding

Which of the following is NOT part of a conventional water treatment? = screening

What coagulant is being used in the water district we visited? = lime XXXXXX

Melanoidin is a pollutant w/c cause color in molasses. = true

Assuming a deoxygenation constant of 0.25 d-1, calculate the expected five-day BOD if the three-day BOD is 148 mg/L. = 200

What treatment of leachate is used by the sanitary landfill we visited? = aerobic

Which of the following chemical properties is NOT related to the group? = permanent hardness XXXXXXX

The Laguna Lake, being used in fish propagation, is classified as ______ water. = class C

The ultimate BOD of wastes from a plant is 280 mg/L. What is the five-day BOD if the deoxygenation constant k is 0.12 d-1 ? = 92.31

Chlorination is the only means of disinfection of water and wastewater. = false

Which government agency ensures that wastewater discharges from industrial plants should not exceed beyond 50 mg/L BOD? = Environment and Natural Resources (DENR)

The following may result from the excessive heat released from power plants to receiving water bodies, except: = Sediments will pile up.

What is the theoretical demand for oxygen if a chemical is identified by the general formula C 4H8O2? = 90.91

COD is a better representation of the strength of organic wastes contained in wastewater as compared to BOD. = False

It is the maximum oxygen consumption possible when the waste has been completely degraded. = bod5 XXXXXX

Which of the following chemical properties of water is NOT related to the group? =temperature

A plant manufacturing cadmium-battery will cause what environmental impact on water? = acidification of surface water XXXXXXXX

Which of the following effects are caused by extreme temperature? = increases rate of chemical reaction XXXXXXXX

Rivers have some capacity for self-purification. = true

It is the dissolution of limestone by reaction w/ SO2 from rainwater w/ H2SO4 or directly from burning of fossil fuels. =

Carbon Cycle XXXXXXX

It is the most commonly used oxidizing agent in the determination of COD. = alum or Al2(SO4)3

User Course Test Started Submitted Due Date

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JOHN NIKKO RODIL ELBAO INTRODUCTION TO ENVIRONMENTAL ENGINEERING Examination 2_ENV20 2Q20162017 11/20/16 10:21 PM 11/20/16 10:53 PM 11/20/16 11:00 PM

Status Attempt Score Time Elapsed

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Completed 110 out of 150 points 31 minutes out of 2 hours

Question 1 0 out of 5 points

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The ultimate BOD of the waste generated from a plant is 280 mg/L. What is the five-day BOD if the deoxygenation constant k is 0.08 d-1 ?

Question 2 10 out of 10 points

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The company you work for plans to release a waste stream found to contain 7.0 mg/L of benzaldehyde (C7H6O) and 5 mg/L of NH3-N. Calculate the theoretical oxygen demand of this waste stream (in mg/L).

Question 3 10 out of 10 points What is the theoretical demand for oxygen if a chemical is identified by the general formula C 4H8O2?

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Question 4 0 out of 2 points

Which of the following chemical properties is NOT related to the group?

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Question 5 2 out of 2 points

It is a biological property of water that refers to the non-pathogenic intestines and its numbers indicate contamination.

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bacteria present in the

Question 6 10 out of 10 points

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Assuming a deoxygenation constant of 0.25 d-1, calculate the expected five-day BOD if the three-day BOD is 148 mg/L.

Question 7

0 out of 2 points The laboratory testing for water and wastewater samples is done at standard temperature of 20 oC.

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Question 8 2 out of 2 points

Which government agency ensures that wastewater discharges from industrial plants should not exceed beyond 50 mg/L BOD?

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Question 9 2 out of 2 points

Which of the following is NOT a characterization of water quality?

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Question 10 2 out of 2 points

According to Philippine Clean Water Act (RA9275), all industrial plants are required to have a wastewater treatment plant.

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Question 11 2 out of 2 points

What is the basis of choosing the filtration method to be used in water treatment?

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Question 12 2 out of 2 points

Which government agency issues water permit to deep wells to be installed?

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Question 13 2 out of 2 points It is one of the major tools of water quality management in rivers to access the capability of a stream to absorb waste load.

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Question 14 2 out of 2 points

Which of the following agencies monitor water quality if it complies with Philippine

National Standard for Drinking Water (PNSDW)?

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Question 15 2 out of 2 points

Which of the following is NOT part of a conventional water treatment?

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Question 16 2 out of 2 points The Laguna Lake, being used in fish propagation, is classified as ______ water.

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Question 17 0 out of 2 points

Which among these physical methods of treating wastewater is the best method if volatile substances are dissolved in the water?

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Question 18 2 out of 2 points It is the outflow from a sewage treatment plant.

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Question 19 2 out of 2 points

Sedimentation or clarification is _______ method of treating water.

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Question 20 2 out of 2 points

It is an attached cell/biofilm process (biological treatment) where solid disks with attached biofilms rotate on a horizontal axis to alternately contact the waste stream and the atmosphere.

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Question 21 2 out of 2 points It is the circulation of water from the oceans to the atmosphere and back to the oceans by way of evaporation, runoff from streams and rivers, and groundwater flow.

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Question 22 2 out of 2 points It is used as coagulant and to depress the pH.

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Question 23 2 out of 2 points Chlorination is the only means of disinfection of water and wastewater.

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Question 24 2 out of 2 points As the amount of wastes decreases in water, the DO level decreases.

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Question 25 0 out of 2 points It is the study of the physical, chemical & biological characteristics of rivers & lakes.

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Question 26 0 out of 2 points It is the dissolution of limestone by reaction w/ SO2 from rainwater w/ H2SO4 or directly from burning of fossil fuels.

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Question 27 0 out of 2 points

Which of the following water quality parameters is NOT monitored on a daily basis in a water treatment plant?

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Question 28 0 out of 2 points It is the maximum oxygen consumption possible when the waste has been completely degraded.

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Question 29 0 out of 2 points

Which government agency regulates water utilities in the Philippines regardless of source, surface or ground water?

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Question 30 2 out of 2 points Which of the following pollutants deplete oxygen in water in their decomposition into simpler substances?

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Question 31 0 out of 2 points

Which of the following water quality parameter is affected by power plants?

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Question 32 2 out of 2 points Microorganisms that require oxygen in decomposing organic materials.

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Question 33 0 out of 2 points It is used to facilitate easier drying of sludge prior to disposal without using open dry bed.

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Question 34 2 out of 2 points It is the measure of its acid neutralizing capacity (ANC) or buffering.

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Question 35 0 out of 5 points The ultimate BOD of wastes from a plant is 280 mg/L. What is the five-day BOD if the deoxygenation constant k is 0.12 d-1 ?

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Question 36 2 out of 2 points The rate of which oxygen is consumed is directly proportional to the concentration of degradable organic matter remaining at any time t.

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Question 37 0 out of 2 points

What coagulant is being used in the water district we visited?

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Question 38 2 out of 2 points COD is a better representation of the strength of organic wastes contained in wastewater as compared to BOD.

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Question 39 2 out of 2 points It is when the water is pumped from an aquifer; the water table is depressed around the well.

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Question 40 0 out of 2 points

A plant manufacturing cadmium-battery will cause what environmental impact on water?

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Question 41 2 out of 2 points The DO should not drop to 5 mg/L, for the existence and persistence of aquatic lives.

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Question 42 2 out of 2 points It is the amount of dissolved oxygen used-up by microorganism to break up organic materials in water at 20oC over a period of 5 days.

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Question 43 2 out of 2 points It is a model that balances the inputs, outputs and storage of water in a system.

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Question 44 2 out of 2 points

is excessive concentrations of particular substances for sufficient periods of time to cause identifiable effects. _______

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Question 45 0 out of 2 points

Which of the following pollutants indicate high BOD?

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Question 46 0 out of 2 points It is the occurrence of rapid vertical change in temperature w/ development of stratification.

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Question 47 2 out of 2 points The pH of acidic rain water is 3.

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Question 48 2 out of 2 points

What treatment of leachate is used by the sanitary landfill we visited?

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Question 49 2 out of 2 points It is an underground zone or body of earth material from which groundwater can be obtained from a well at a useful rate.

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Question 50 2 out of 2 points It is the natural process whereby waters emerge from their stream channel to cover part of the floodplain.

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Question 51 2 out of 2 points

Which of the following chemical properties of water is NOT related to the group?

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Question 52 2 out of 2 points Rivers have some capacity for self-purification.

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Question 53 2 out of 2 points

What treatments can be done under tertiary treatment?

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Question 54 2 out of 2 points

It is due to dissolved ions in solutions that conducts electricity and it is the measure of the ability of an aqueous solution to carry an electric current.

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Question 55 2 out of 2 points Melanoidin is a pollutant w/c cause color in molasses.

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Question 56 2 out of 2 points The following may result from the excessive heat released from power plants to receiving water bodies, except:

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Question 57 2 out of 2 points

It is a physical water quality parameter that is caused by dissolved organics (phenols, chlorophenols) & inorganic chemicals & organisms, or due to decaying micro-organisms or algae or due to high concentrations of salts such as Ca+2, Mg+2, Cl- and this parameter is difficult to measure (subjective).

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Question 58 2 out of 2 points It is the most commonly used oxidizing agent in the determination of COD.

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Question 59 0 out of 2 points

Which of the following effects are caused by extreme temperature?

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Question 60 2 out of 2 points

130 ppm of BOD effluent is not acceptable from an industry with an influent of 3,000 to 10,000 ppm BOD.

Sunday, November 20, 2016 10:53:14 PM PHT