Envi Concepts

Question 1

Water Quality Guidelines

Answer 1

DAO 34

Question 2

General Effluent Standards

Answer 2

DAO 35

Question 3

Water Quality Guidelines and General Effluent Standards

Answer 3

DAO 2016-08

Question 4

Class of water intended for primary contact recreation such as
bathing, swimming, skin diving, etc.

Answer 4

Class B

Question 5

The resistance of water to the passage of light through it is a measure
of the

Answer 5

turbidity

Question 6

The total solids in water are due to the presence of

Answer 6

a. suspended and dissolved solids

Question 7

not a physical characteristic of wastewater

Answer 7

hardness

Question 8

It is the phenomenon that results in the overabundance of algae
growth in bodies of water. It is also the natural process of nutrient
enrichment that occurs over time in a body of water.

Answer 8

eutrophication

Question 9

Measure of the total organic and ammonia nitrogen in the
wastewater. It also gives a measure of the availability of nitrogen for
building cells.

Answer 9

TKN

Question 10

Involves the accumulation of trace metals through each species of
the food chain.

Answer 10

biomagnification

Question 11

Type of wastewater treatment that employs physical and chemical
treatment methods to remove or reduce a high percentage of
suspended solids and toxic materials.

Answer 11

a. Primary Treatment

Question 12

Hard water can be softened by

Answer 12

b. passing it through an ion exchanger

Question 13

Removal of all settleable particles rendered settleable under the
influence of gravity, basically the theory of gravity under the influence
of which all particles heavier than water tend to settle down.

Answer 13

sedimentation

Question 14

In facultative stabilization pond, the sewage is treated by
a. aerobical bacteria
c. algae
b. anaerobic bacteria
d. both (a) and (b)

Answer 14

d. both (a) and (b)

Question 15

Process whereby coarse matter (suspended or floating) of a certain
size can be strained out of flowing water with the aid of bars, fines
wires or rocks.

Answer 15

a. screening

Question 16

Water treatment that destroys disease-causing bacteria, nuisance
bacteria, parasites and other organisms and removes soluble irons,
manganese and hydrogen sulfide from water.

Answer 16

chlorination

Question 17

A code for plastics used for food wrapping, trash bags, grocery bags
and baby diapers.

Answer 17

4

Question 18

Kyoto Protocol

Answer 18

regulate emissions of greenhouse gases

Question 19

Montreal Protocol

Answer 19

aims to diminish and eventually phase out cfcs

Question 20

Stockholm Convention

Answer 20

….. from persistent organic pollutants

Question 21

Clean Air Act of the Philippines

Answer 21

RA 8749

Question 22

Ecological Solid Waste Management

Answer 22

RA 9003

Question 23

Toxic Substances …

Answer 23

RA 6969

Question 24

Layers of Atmosphere Mnemonic

Answer 24

The Smart Man Takes Elevator

Exosphere
Thermosphere: Ionosphere
Mesosphere: very low atm P and T
Stratosphere: Ozone
Troposphere: Clouds, air

Question 25

“Smokey Mountain” is a typical example of a facility for solid waste. It is classified as

Answer 25

a. open dumping site

Question 26

Collective term for the initial POPs identified by the Stockholm Convention

Answer 26

Dirty Dozens

Question 27

It is an odorless and colorless gas that is lethal to humans with exposure as short as a few minutes to concentrations exceeding 5000 ppm. It reacts with hemoglobin in the blood rendering the latter incapable of carrying oxygen to the body.

Answer 27

a. carbon monoxide

Question 28

Pick out the wrong statement. a. The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone. b. Mesosphere is characterized by very low atmosphere pressure and low temperature. c. Troposphere is a dusty zone containing water vapor and clouds. d. The radio waves used in the long-distance radio communication are reflected to earth by stratosphere.

Answer 28

d. The radio waves used in the long-distance

Question 29

Which biogeochemical cycle has bacteria living in a symbiotic relationship with the roots of legumes?

Answer 29

nitrogen

Question 30

By which process is carbon dioxide released from plants back into the atmosphere?

Answer 30

b. respiration

Question 31

Which of the acid combination is the dominant composition of acid rain?

Answer 31

b. nitric acid and sulfuric acid

Question 32

All of biogeochemical cycles involve ..... except

Answer 32

hydrosphere

Question 33

decomposers return back nitrogen to the soils through remains and waste

Answer 33

ammonification

Question 34

In determination of BOD, the reaction takes place in the dark because

Answer 34

d. Algae may be present and produce oxygen.

Question 35

In the determination of BOD, the reaction takes place at

Answer 35

20 deg C

Question 36

The color of wastewater containing little or no dissolved oxygen is

Answer 36

Black

Question 37

Dissolved oxygen in water is reduced during

Answer 37

Summer