MRII ENVI REVIEW QUESTION Flashcards by EGAÑA, SHEA P.

The process where more harmful substances are produced from less harmful ones.
a. Synergism
b. Eutrophication
c. Biomagnification
d. Thermal stratification

a. Synergism

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Part of the atmosphere where most of photochemical reactions take place.
a. stratosphere
b. mesosphere
c. ionosphere
d. troposphere

b. mesosphere

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Organisms that belong to the second trophic level.
a. omnivores
b. herbivores
c. carnivores
d. detritivores

b. Herbivores

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It is defined as the role of the organisms in the community.
a. biotic factors
b. biomes
c. trophic level
d. niche

d. Niche

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Process where decomposers return back the nitrogen to the soils through the remains and waste of plants and animals.
a. ammonification
b. nitrogen fixation
c. denitrification
d. ammonolysis

a. Ammonification

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Involves the accumulation of trace metals through each species of the food chain.
a. biomagnification
b. thermal inversion
c. anaerobic respiration
d. eutrophication

a. Biomagnification

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Process of converting nitrogen gas to ammonia is called.
a. ammonification
b. denitrification
c. nitrogen fixation
d. ammonolysis

c. Nitrogen fixation

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These organisms feed on the waste of the ecosystem.
a. omnivores
b. herbivores
c. carnivores
d. detritivores

d. Detritivores

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Biomes are distinguished or identified by its.
a. dominant plant life
b. climate
c. type of plants and animals
d. geographic location

a. Dominant plant life

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Denitrification is carried out when bacteria break down nitrates and release nitrogen gas. What are these bacteria?
a. anaerobic bacteria
b. cyanobacteria
c. rhizobium
d. aerobic bacteria

a. anaerobic bacteria

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Total uptake of chemicals by an organism from food items as well as via mass transport of dissolved chemicals.
a. bioaccumulation
b. biomagnification
c. bioconcentration
d. all of these

a. Bioaccumulation

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The permissible color for domestic water supply in ppm is.
a. 5
b. 10
c. 15
d. 20

d. 20

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The resistance of water to the passage of light through it is a measure of the.
a. color
b. turbidity
c. hardness
d. dissolved gases

b. Turbidity

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The total solids in water are due to the presence of.
a. Suspended and dissolved solids
b. Suspended and floating solids
c. Colloidal and settleable solids
d. Colloidal and bacterial loads

a. Suspended and dissolved solids

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Which of the following is NOT a physical characteristic of wastewater?
a. odor
b. turbidity
c. color
d. hardness

d. Hardness

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Gas responsible for the rotten egg odor of wastewater.
a. ammonia
b. amines
c. mercaptans
d. hydrogen sulfide

d. Hydrogen sulfide

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A trace metal which causes the Itai-itai disease is.
a. cadmium
b. silver
c. mercury
d. chromium

a. cadmium

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It is a phenomenon that results in the overabundance of algae growth in bodies of water.
a. biomagnification
b. thermal inversion
c. anaerobic respiration
d. eutrophication

d. Eutrophication

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The red brownish color of water is due to the presence of dissolved impurities of.
a. bicarbonate
b. sulphate
c. arsenic
d. iron and manganese

d. Iron and manganese

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The alkalinity of wastewater is due to the presence of the following EXCEPT.
a. ammonia
b. dissolved CO₂
c. carbonate
d. bicarbonate

b. Dissolved CO₂

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Hardness of water is usually expressed as parts per million of.
a. MgSO4
b. Na2CO3
c. CaCO3
d. CaCl₂

c. CaCO3

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Which of the following may be used to measure the assimilative capacity of a stream?
a. BOD
b. COD
c. ThOD
d. TOC

a. BOD

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Type of wastewater treatment that employs physical and chemical treatment methods to remove or reduce a high percentage of suspended solids and toxic materials.
a. Primary Treatment
b. Secondary Treatment
c. Tertiary Treatment
d. Minor Treatment

a. Primary Treatment

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Process whereby coarse matter (suspended or floating) of a certain size can be strained out of flowing water.
a. screening
b. flotation
c. sedimentation
d. flocculation

a. Screening

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Removal of all settleable particles rendered settleable under the influence of gravity. a. screening b. flotation c. sedimentation d. flocculation

c. Sedimentation

Which of the following is NOT used as adsorbent material? a. activated charcoal b. Fuller's earth c. silica gel d. water

d. Water

Insufficient washing of sand grains in a rapid sand filter causes. a. air-binding b. mud balls c. shrinkage of media d. expansion of media

b. Mud balls

Which of the following is NOT used for the disinfection of water? a. ozone b. chlorine c. ultra-violet rays d. sulfuric acid

d. Sulfuric acid

Most aquatic organisms can survive in a pH range of about. a. pH = 3 to 7 b. pH = 7 to 11 c. pH = 6 to 9 d. pH=5 to 8

c. pH = 6 to 9

Most commonly used coagulating agent. a. aluminum sulfate b. ferric sulfate c. ferric chloride d. sulfuric acid

a. Aluminum sulfate

Nitrates more than 50 ppm in water leads to a disease called. a. Typhoid b. Mathenoglobenemia c. Gastroenteritis d. Mottled tee

b. Methanoglobenemia

The process of killing infective bacteria in water is called. a. coagulation b. screening c. sterilization d. sedimentation

c. Sterilization

The amount of chlorine available in water after the disinfection is called. a. Free chlorine b. Residual chlorine c. Free available chlorine d. Combines available

b. Residual chlorine

What substance in water is removed by Lime Soda Process? a. Odor and taste b. permanent hardness c. Iron and manganese d. temporary hardness

d. temporary hardness

An electrochemical process used in the removal of colloidal matter in wastewater. a. coagulation b. neutralization c. flocculation d. precipitation

a. Coagulation

These are accumulated solids removed from separation equipment such as settling tanks and clarifiers. a. flocs b. suspended solids c. total dissolved solids d. sludge

d. Sludge

Water treatment that destroys disease-causing bacteria, parasites and other organisms. a. disinfection b. chlorination c. flocculation d. coagulation

b. chlorination

A neurological disease characterized by trembling and convulsions due to ingestion of mercury. a. scurvy b. minimata c. itai-itai d. argyria

b. Minamata

Type of wastewater treatment that employs biological methods to remove fine suspended, colloidal and dissolved organics. a. Primary Treatment b. Secondary Treatment c. Tertiary Treatment d. Minor Treatment

b. Secondary Treatment

A wastewater with a BOD/COD = 1 indicates that. a. chemical treatment is required b. biological treatment is most practical c. the wastewater is highly polluted d. does not indicate anything

b. Biological treatment is most practical

A continuous re-circulating aerobic biochemical process that keeps cells in suspended growth. a. activated sludge process b. trickling filters c. stabilization ponds d. aerated lagoon

a. Activated sludge process

When a sample of water is added to a medium of agar and incubated at 37°C for 20 hours, this test is called. a. Total Count Test b. Presumptive Test c. Confirmative Test d. Completed Test

a. Total Count Test

Aeration of water is done to remove. a. suspended impurities b. floating impurities c. dissolved salts d. dissolved gases

d. Dissolved gases

Legislation that presents the revised water usage and classification. a. DENR Administrative Order No. 34 b. Philippine Clean Water Act of 2004 c. Water Code of the Philippines d. Republic Act 9003

a. DENR Administrative Order No. 34

Class of water intended for primary contact recreation such as bathing. a. Class AA b. Class A c. Class B d. Class C

c. Class B

What is the atmospheric condition when the lapse rate is >10°C/km? a. adiabatic b. subadiabatic c. superadiabatic d. none of these

c. Superadiabatic

A global treaty that aims to regulate emissions of greenhouse gases. a. Stockholm Convention b. Montreal Protocol c. Kyoto Protocol d. none of these

c. Kyoto Protocol

This provides the blueprint for action towards sustainable development. a. Earth Summit b. Agenda 21 c. Montreal Draft d. POPs Convention

b. Agenda 21

Generic term used to describe the particulate matter carried in the effluent gases from furnaces burning fossil fuels. a. PM10 b. TSP c. fly ash d. ESP

c. fly ash

These reddish brown oxides in concentrated form may produce an abnormal accumulation of fluids in the lungs. a. COx b. SOx c. NOx d. TSP

c. NOx

These are closed compartments that use gravitational force to extract dust and mist. a. electrostatic precipitator b. settling chamber c. cyclone device d. wet collectors

b. Settling chamber

A global treaty that aims to diminish and eventually phase out chlorofluorocarbons. a. Stockholm Convention b. Montreal Protocol c. Kyoto Protocol d. none of these

b. Montreal Protocol

It is a very unstable gas used for disinfection, capable of oxidizing 200 to 300 times more than chlorine. a. hypochlorite b. hydrogen peroxide c. ozone d. fluorine

c. Ozone

A phenomenon where a cold layer of air becomes trapped by a layer of warmer air above. a. global warming b. thermal inversion c. greenhouse effect d. anaerobic respiration

b. Thermal inversion

It is described as the cloud of air pollution trapped by thermal inversion. a. CFC b. smog c. NOx d. SO2

b. Smog

A global treaty that aims to protect human health and the environment from persistent organic pollutants. a. Stockholm Convention b. Montreal Protocol c. Kyoto Protocol d. none of these

a. Stockholm Convention

PAN is a powerful lachrymator or tear producer formed from unburned hydrocarbons, aldehydes, nitrogen oxides and oxygen. PAN stands for. a. peroxyacetyl nitrate b. peroxyallyl nitrate c. peroxyamyl nitrate d. peroxyalkyl nitrate

a. Peroxyacetyl nitrate

Component of CFC's that causes destruction of 100,000 molecules of ozone. a. carbon b. chlorine c. fluorine d. hydrogen

b. Chlorine

It is used as bonding agents in building and furniture construction which may cause drowsiness. a. formaldehyde b. radon c. PAN d. CO

a. Formaldehyde

The liquid produced when water percolates through any permeable material. a. sludge b. leachate c. PVC d. HDPE

b. Leachate

Recyclable material labeled as no. 3. a. PET b. PS c. PVC d. HDPE

c. PVC

It is defined as the controlled decomposition of organic materials. a. composting b. putrefaction c. incineration d. recycling

a. Composting

Type of recycling that involves recovery of chemicals or energy from post-consumer waste materials. a. Primary b. Secondary c. Tertiary d. Quaternary

c. Tertiary

Ecological Solid Waste Management Act of 2000 is otherwise known as. a. RA 6969 b. RA 8749 c. RA 9003 d. RA 9275

c. RA 9003

Which of the following is NOT classified as heavy industry in the list of environmentally critical projects? a. iron and steel industry b. non-ferrous metal industry c. smelting plants d. forestry projects

d. Forestry projects

Calculate the theoretical oxygen demand (ThOD) of 150 ppm glucose. a. 104 ppm b. 116 ppm c. 137 ppm d. 160 ppm

d. 160 ppm

If the three-day BOD (BOD3) of a raw sewage is 55 ppm (k=0.55/day), what is the ultimate BOD? a. 68 ppm b. 96 ppm c. 107 ppm d. 123 ppm

a. 68 ppm

Determine the theoretical oxygen demand of 100 ppm of glutamic acid. C5H9O4N + 4.5O2 -> 5CO2 + 3H2O + NH3 NH3 + 2O2 -> (NO3-) + (H+) + H2O a. 44 ppm b. 98 ppm c. 130 ppm d. 141 ppm

d. 141 ppm

The pH of a water sample was found to be 7.5. The bicarbonate was measured to be 2.1 x 10^-3 M. Assuming that the sample was isolated from the atmosphere, calculate the total carbonate is pKa1 and pKa2 are equal to 6.3 and 10.33, respectively. a. 2.2 x 10^-3 M b. 2.4 x 10^-3 M c. 2.6 x 10^-3 M d. 2.8 x 10^-3 M

b. 2.4 x 10^-3 M

A water sample was analyzed to contain 150mg/L*CO3^2 and 100mg/L*HCO3 at a pH of 8.00. Approximate its total alkalinity in terms of mg/L*CaCO3. a. 166 ppm b. 332 ppm c. 489 ppm d. 664 ppm

b. 332 ppm

MRII ENVI REVIEW QUESTION Flashcards

(70 cards)