ENVIRONMENTAL POLLUTION & CONTROL MCQS 10

ENVIRONMENTAL POLLUTION & CONTROL  MCQS 10

1. Pick out the wrong statement.
(A) A slight haze at the top of chimney indicates good combustion in the furnace
(B) A bag filter incurs very small pressure drop and is very efficient for removal of submicronic dust particles from flue gases at very high temperature
(C) Electrostatic precipitator is the most efficient dust collection equipment for removal of submicronic dust particles present in flue gas
(D) None of these
Answer: Option B
 
2. The progressive warming up of the earth's surface is mainly due to the
(A) Automobile exhaust
(B) Blanketing effect of CO2 in the atmosphere
(C) De-forestation
(D) Thickening of ozone layer
Answer: Option B
 
3. The function of skimming tank in sewage treatment is to remove __________ substances.
(A) Dissolved solid
(B) Suspended solid
(C) Oil & fatty
(D) Gritty & inorganic
Answer: Option C
 
4. Hydrogen ion concentration in distilled water is
(A) 10^-7
(B) 7 × 10^-7
(C) 107
(D) 7 × 10^7
Answer: Option A
 
5. A standard test for determination of hardness in water is termed as __________ test.
(A) EDTA
(B) Electometric
(C) Total count
(D) Presumptive
Answer: Option A
 
6. Infective bacteria in water is killed by the __________ process.
(A) Sterilisation
(B) Aeration
(C) Disinfection
(D) None of these
Answer: Option A
 
7. Removal of __________ results from the disinfection of water.
(A) Turbidity
(B) Odour
(C) Hardness
(D) Bacteria
Answer: Option D
 
8. Ozone is
(A) A primary pollutant
(B) A secondary pollutant
(C) Impervious to ultra-violet rays
(D) Both (B) and (C)
Answer: Option D
 
9. Which of the following is not a natural source of air pollution?
(A) Volcanic eruptions and lightening discharges
(B) Biological decay of vegetable matter
(C) Photochemical oxidation of organic matter
(D) None of these
Answer: Option D
 
10. Which of the following is a secondary air pollutant?
(A) Photochemical smog
(B) Sulphur dioxide
(C) Nitrogen dioxide
(D) Dust particles
Answer: Option A