Environmental Engineering

Question 1

Process where decomposers return back the nitrogen to the soils through the remains and wastes of plants and animals

A. Ammonification
B. Nitrogen fixation
C. Anaerobic respiration
D. Eutrophication

Answer 1

A. Ammonification

Question 2

Process of converting nitrogen gas to ammonia is called

A. Ammonification
B. Denitrification
C. Nitrogen fixation
D. Ammonolysis

Answer 2

C. Nitrogen fixation

Question 3

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

A. Color
B. Turbidity
C. Nitrogen fixation
D. Ammonolysis

Answer 3

B. Turbidity

Question 4

Part of the atmosphere where most of photochemical reactions take place

A. Stratosphere
B. Mesosphere
C. Ionosphere
D. Troposphere

Answer 4

B. Mesosphere

Question 5

Denitrification is carried out when bacteria breakdown nitrates and release nitrogen gas. What are these bacteria?

A. Anaerobic bacteria
B. Cyanobacteria
C. Rhizobium
D. Aerobic bacteria

Answer 5

A. Anaerobic bacteria

Question 6

An electrochemical process used in the removal of colloidal matter in wastewater through reduction of electrostatic charges surrounding the solids.

A. Coagulation
B. Neutralization
C. Flocculation
D. Precipitation

Answer 6

A. Coagulation

Question 7

The amount of chlorine available in water after the disinfection is called

A. Free chlorine
B. Residual chlorine
C. Free available chlorine
D. Combined available chlorine

Answer 7

B. Residual chlorine

Question 8

Hardness of water is usually expressed as parts per million of

A. MgSO4
B. Na2CO3
C. CaCO3
D. CaCl2

Answer 8

C. CaCO3

Question 9

What substance in water is removed by Lime Soda Process?

A. Odor and taste
B. Permanent hardness
C. Iron and Manganese
D. Temporary hardness

Answer 9

D. Temporary hardness

Question 10

A wastewater with a BOD/COD = 1 indicate that

A. Chemical treatment is required
B. Biological treatment is required
C. The wastewater is highly polluted
D. Does not indicate anything

Answer 10

B. Biological treatment is required

Question 11

These are accumulated solids removed from separation equipment such as settling tank and clarifiers.

A. Flocs
B. Suspended solids
C. Total dissolved solids
D. Sludge

Answer 11

D. Sludge

Question 12

A trace metal which causes the Itai-itai disease is

A. Cadmium
B. Silver
C. Mercury
D. Chromium

Answer 12

A. Cadmium

Question 13

The alkalinity of wastewater is due to the presence of the following except

A. Ammonia
B. Dissolved CO2
C. Carbonate
D. Bicarbonate

Answer 13

B. Dissolved CO2

Question 14

Which of the following is not an adsorbent material?

A. Activated carbon
B. Fuller’s earth
C. Silica gel
D. Water

Answer 14

D. Water

Question 15

A global treaty that aims to regulate greenhouse gases

A. Stockholm Convention
B. Montreal Protocol
C. Kyoto Protocol
D. None of these

Answer 15

C. Kyoto Protocol

Question 16

Recyclable material labeled as no. 3

A. PET
B. PS
C. PVC
D. HDPE

Answer 16

C. PVC

Question 17

What is the atmospheric condition when lapse rate > 10°C/km?

A. Adiabatic
B. Subadiabatic
C. Superadiabatic
D. None of these

Answer 17

C. Superadiabatic

Question 18

Legislation thta 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

Answer 18

A. DENR Administrative Order No. 34

Question 19

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

Answer 19

D. pH = 5 to 8

Question 20

Generic term used to describe the particulate matter carried in the effluent gases from furnace burning fossil fuels

A. PM10
B. TSP
C. Fly ash
D. ESP

Answer 20

C. Fly ash

Question 21

Types of recycling that involves recovery of chemicals or energy from post consumer waste materials

A. Primary
B. Secondary
C. Tertiary
D. Quaternary

Answer 21

C. Tertiary