quiz3(mod3)

Question 1

process of improving the quality of water for its intended use

Answer 1

water treatment

Question 2

specific contaminants that are removed by water treatment

Answer 2

physical, chemical, biological and radiological

Question 3

method of water treatment
by allowing time and inactivity of water for heavier particles to settle on the bottom of the

Answer 3

sedimentation

Question 4

method of water treatment
additon of chemical alum or hydrated aluminum sulfate to remove suspended matters and some coloration

Answer 4

coagulation

Question 5

method of water treatment
surface of water is exposed to air as much as possible which improves the taste and color of water and decrease its corrosiveness

Answer 5

aeration/oxidation

Question 6

powerful oxidizing and disinfecting method to destroy bacteria which passes dry air or pure oxygen to a system where 80% of the energy is converted into heat

Answer 6

ozonation

Question 7

method of water treatment which is the common means of water treatment

Answer 7

filtration

Question 8

method of water treatment under filtration

generaslly used for rainwater applicatiom, easy to be constructed and low maintenance

Answer 8

slow sand filtration

Question 9

method of water treatment under filtration that uses pressure to force water out of a containment such as tank. It uses sand as a filtering agent and commonly used in swimming pool applications

Answer 9

pressure sand filtration

Question 10

method of water treatment under filtration which uses _ obtained from which is a siliceous sedimentary rock and produces an end product of clean and dirt-free water

Answer 10

diatomaceous earth filter
diatomite

Question 11

method of water treatment under filtration that is composed of permeable porcelain and unglazed tube called

Answer 11

pasteur filters
bisque

Question 12

method of water treatment under filtration that is a combined process of removing iron and manganese

Answer 12

fine filtration by chlorination

Question 13

method of water treatment under filtration that uses which attracts large quantities of gas. It works through a process called _ where contaminant is trapped inside the pore molecule. commonly used in domestic water purification which can remove undesirable taste and color

Answer 13

activated carbon filters
adsorption

Question 14

method of water treatment under filtration, which is widely used to remove dissolved, suspended and even biological contaminants

Answer 14

reverse osmosis

Question 15

method of water treatment that is the most important health related water treatment

Answer 15

disinfection

Question 16

the most widely used disinfectant

Answer 16

chlorine

Question 17

compounds result from the reaction of ammonia and chlorine in a water solution. less strong and have less bacteeria killing ability

Answer 17

chloramine

Question 18

stronger disinfecting ability then chloramine

Answer 18

chlorine dioxide

Question 19

common relative to chlorine that is used for disinfecting water of unknown quality

Answer 19

iodine

Question 20

method of water treatment that heats water to allow condensation, the resulting water may be flat in taste but can also kill basteria and viruses and removes iron and lead

Answer 20

distillation

Question 21

method of water treatment that is advantageous to children to drink this because they will have less rate on tooth decay. _ is toxic that can mottle up teeth

Answer 21

fluoridation

Question 22

defined as the slow degradation of metal by the flow of an electric current from metal to its surrounding

Answer 22

corrosion

Question 23

method of water treatment which prevents corrosive water to increase the concentration of hazardous materials

Answer 23

corrosion control

Question 24

method of water treatment wherein some organisism may not be injurious to health but can be rrapidly multiply that can cause clogging

Answer 24

nuisance control

Question 25

method of water treatment which is a mechanism of contaminant removal by using the _ phenomenon which is the act of physical adhesion of molecule to the surface of the medium without chemical reaction

Answer 25

adsorption

Question 26

method of water treatment that exposes small scale water supply to ultraviole

Answer 26

Ultraviolet Irradiation

Question 27

what is the remaining liquid called in the process of water desalination

Answer 27

brine