Environmental Engineering

Question 1

It is known as Water Quality Guidelines and General Effluent Standards of 2016

Answer 1

DAO No. 2016-08

Question 2

Philippine Clean Water Act of 2004

Answer 2

RA 9275

Question 3

Class of fresh water intended primarily for waters having watersheds, which are uninhabited and/or declared as protected areas

Answer 3

Class AA

Question 4

Class of fresh water intended as sources of water supply requiring conventional treatment (coagulation, sedimentation, filtration and disinfection) to meet the latest PNSDW

Answer 4

Class A

Question 5

Class of fresh water intended for primary contact recreation (bathing, swimming, etc.)

Answer 5

Class B

Question 6

Class of fresh water for the propagation and growth of fish and other aquatic resources; for boating, fishing, or similar activities; for agriculture, irrigation, and livestock watering.

Answer 6

Class C

Question 7

Class of fresh water for navigable waters

Answer 7

Class D

Question 8

Class of fresh water for protected waters designated as national pr local marine parks, reserves, sanctuaries, and other areas; suitable for shellfish harvesting for direct human consumption.

Answer 8

Class SA

Question 9

Class of fresh water suitable for commercial propagation of shellfish and intended as spawning areas for milkfish; for ecotourism and recreational activities.

Answer 9

Class SB

Question 10

Class of fresh water used for propagation and growth of fish and other aquatic resources and intended for commercial and sustenance fishing; marshy and/or mangrove areas declared as fish and wildlife sanctuaries.

Answer 10

Class SC

Question 11

Class of fresh water for navigable waters

Answer 11

Class SD

Question 12

% Salinity for freshwater

Answer 12

< 500 ppm

Question 13

% Salinity for marine water

Answer 13

< 30 ppt

Question 14

Compound responsible for the fishy odor of wastewater

Answer 14

Amines

Question 15

Compound responsible for the ammoniacal odor of wastewater

Answer 15

Ammonia

Question 16

Compound responsible for the decayed fish odor of wastewater

Answer 16

Diamines

Question 17

Compound responsible for the rotten egg odor of wastewater

Answer 17

Hydrogen Sulfide

Question 18

Compound responsible for the skunk odor of wastewater

Answer 18

Mercaptans

Question 19

Compound responsible for the rotten cabbage odor of wastewater

Answer 19

Organic Sulfide

Question 20

Compound responsible for the fecal odor of wastewater

Answer 20

Skatole

Question 21

What is generally the color of fresh sewage?

Answer 21

Grayish

Question 22

What is generally the color of septic sewage?

Answer 22

Black

Question 23

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

Answer 23

Turbidity

Question 24

Dissolved oxygen in water is reduced during

a. winter
b. summer
c. spring
d. autumn

Answer 24

summer

Question 25

The color of wastewater containing little or no dissolved oxygen is a. gray b. black c. brown d. reddish brown

Answer 25

black

Question 26

In the determination of BOD, the reaction takes place at a. 20 C b. 30 C c. 40 C d. 50 C

Answer 26

20 C

Question 27

In the determination of BOD, the reaction takes place in the dark because a. the microorganisms are sensitive to light. b. oxygen is sensitive to light. c. the reaction is enhanced in the dark. d. algae may be present and produce oxygen.

Answer 27

algae may be present and produce oxygen.

Question 28

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

Answer 28

eutrophication

Question 29

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

Answer 29

biomagnification

Question 30

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

Answer 30

cadmium

Question 31

A trace metal which causes Minimata diseases is a. cadmium b. silver c. mercury d. chromium

Answer 31

mercury

Question 32

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

Answer 32

primary treatment

Question 33

Hard water can be softened by a. letting the calcium or magnesium ions settle out b. passing it through an ion exchanger c. chlorination d. filtration

Answer 33

passing it through an ion exchanger

Question 34

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

Answer 34

RA 9003

Question 35

Clean Air Act of the Philippines is otherwise known as a. RA 6969 b. RA 8749 c. RA 9003 d. RA 9275

Answer 35

RA 8749

Question 36

Toxic Substances and Hazardous and Nuclear Wastes is otherwise known as a. RA 6969 b. RA 8749 c. RA 9003 d. RA 9275

Answer 36

RA 6969

Question 37

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

Answer 37

Montreal Protocol

Question 38

Regulates emissions of greenhouse gases a. Stockholm Convention b. Kyoto Protocol c. Montreal Protocol d. None of these

Answer 38

Kyoto Protocol

Question 39

This aims to protect human health and the environment from persistent organic pollutants. a. Stockholm Convention b. Kyoto Protocol c. Montreal Protocol d. None of these

Answer 39

Stockholm Convention