4 Lec Q Part 2 - Water Pollution Quiz

Which of the following is NOT a source of water pollution?

Agricultural pollutants
Sewage
Dissolved minerals (correct)
Industrial waste

What are the types of pollutants discharged from point sources?

Dissolved minerals and microscopic organisms
Factories and oil tankers (correct)
Fertilizers and pesticides
Toxic agents and heat

Which water-borne disease is caused by arsenic?

Toxicity
Fluorosis
Enlargement of thyroid gland
Cancer (correct)

What can high levels of nitrate in water lead to?

Blood poisoning (B) Signup and view all the answers

Which of the following is Not considered a non-point source of water pollution?

Oil tankers (C) Signup and view all the answers

What are the natural impurities found in water?

Dissolved minerals and suspended impurities (A) Signup and view all the answers

Which of the following is NOT a water-borne disease caused by chemicals?

Diabetes (A) Signup and view all the answers

What should be done before handling food?

Wash hands with soap and water (B) Signup and view all the answers

Which of the following is NOT a type of physical pollutant in water?

Metal salts (B) Signup and view all the answers

Which method of purification is commonly used on a small scale for domestic purposes?

Boiling (C) Signup and view all the answers

What is the purpose of disinfection in the water purification process?

To kill bacteria and viruses (A) Signup and view all the answers

Which method of disinfection uses programmed chlorine release technology?

Germkill Processor (B) Signup and view all the answers

What is the method of chlorination?

All of the above (D) Signup and view all the answers

What is the minimum recommended concentration of free chlorine in water for disinfection?

0.5 mg/L (A) Signup and view all the answers

Which method of chlorination is quick in action, efficient, and easy to apply?

Chlorine gas (B) Signup and view all the answers

What does chlorine primarily kill in the water purification process?

Bacteria and certain viruses (D) Signup and view all the answers

What is the purpose of storage in the water purification process?

To allow natural purification processes (A) Signup and view all the answers

What is the recommended storage (Biological) duration thereafter chance of algal growth causing change in color & odor?

7-10 days (A) Signup and view all the answers

Which method of purification removes visible dirt to provide safe drinking water?

Microfibre Mesh (B) Signup and view all the answers

Which of the following is NOT a type of water pollutant caused by human activity?

Dissolved minerals (A) Signup and view all the answers

What is the primary source of pollution from sewage?

C & D (A) Signup and view all the answers

Which of the following water-borne diseases is caused by high levels of Chlorine in water?

Cell damage in the human body (B) Signup and view all the answers

Which of the following is NOT a method of water purification?

All of the above are true (D) Signup and view all the answers

Which of the following is NOT a chemical disinfection method?

Microfibre Mesh (B) Signup and view all the answers

What is the primary purpose of chlorination in the water purification process?

To kill bacteria (D) Signup and view all the answers

Which of the following is NOT a principle of chlorination?

Water should be clear and free from turbidity (A) Signup and view all the answers

Match the following water-borne diseases with the chemicals that cause them:

Arsenic = Cancer, vascular disease, liver disease, skin lesions, neurological diseases Fluoride = Fluorosis Chlorine = Toxic & causes sufficient cell damage in the human body Iodine = Enlargement of thyroid gland & mental retardation Signup and view all the answers

Match the following types of water pollutants with their definitions:

Point sources = Discharge pollutants from specific locations, such as factories and sewage treatment plants Non point sources = Run off water containing pesticides and fertilizers from areas of agricultural land that are difficult to monitor and control Sewage = Contains decomposable organic matter and pathogenic agents Industrial and trade waste = Contains toxic agents ranging from metal salts to complex synthetic organic chemicals Signup and view all the answers

Match the following water purification methods with their descriptions:

Compact Carbon Trap = Removes harmful parasites and pesticides to give clean drinking water. Polisher = Removes chlorine and other contaminants to make water clear, odourless and great tasting. Germkill Processor = Uses 'programmed chlorine release technology' to target and remove invisible harmful viruses and bacteria and provide pure drinking water. Microfibre Mesh = Removes visible dirt to give safe drinking water. Signup and view all the answers

Match the following water purification methods with their specific actions:

Chlorination = Kills bacteria, no effect on spores and certain viruses except in high doses. Oxidizes iron, manganese and H2S. Destroys some color & odor producing constituent. Boiling = Removes temporary hardness from water Chloramines = Loose compounds of cl2 and NH3 Less tendency to produce chlorinous taste more persistent type of residual cl2 , gives more persistent type of residual cl2 . Slow in action hence not used. Chemical Disinfection = Kills harmful viruses and bacteria in water Signup and view all the answers

Match the following water purification methods with their types:

Boiling = Physical method Chemical Disinfection = Chemical method Germkill Processor = Biological method Chlorination = Chemical method Signup and view all the answers

Match the following water purification methods with their recommended usage:

Perchloron = (HTH) ca compound with 60-70% available Cl2 . Solution of HTH also used. Gas is first choice Chemical = organic matter in the water oxidized by aerobic bacteria with the help of dissolved o2 Physical = 90% suspended impurities settle down by gravity in 24 hrs. rendering clear water Biological = drop in bacterial count by 90% in 5-7 days. Optimum storage 7-10 days thereafter chance of algal growth causing change in color & odor Signup and view all the answers