ENVIRONMENTAL POLLUTION & CONTROL MCQS 14

ENVIRONMENTAL POLLUTION & CONTROL  MCQS 14

1. Fine grit present in sewage is removed in the __________ during sewage treatment.
(A) Grit chamber
(B) Detritus tank
(C) Trickling filter
(D) Skimming tank
Answer: Option B
2. Which of the following pollutants is absent in the emissions from a fertiliser plant?
(A) SO2 & SO3
(B) NO2
(C) NH3
(D) CO
Answer: Option D
3. Out of the following, TLV of __________ is maximum (about 500 ppm).
(A) Carbon dioxide
(B) Toluene
(C) Carbon disulphide
(D) Acetaldehyde
Answer: Option A
4. The biological decomposition of organic substances in wastes controlled conditions is called
(A) Incineration
(B) Biological oxidation
(C) Composting
(D) None of these
Answer: Option C
5. Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
(A) 0.002
(B) 0.2
(C) 1.2
(D) 4.8
Answer: Option B
6. Which of the following sources is responsible for maximum air pollution?
(A) Industrial chimney exhaust
(B) Forest fire
(C) Automobiles exhaust
(D) Photochemical oxidation of organic matter
Answer: Option C
7. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
(A) 10
(B) 90
(C) 800
(D) 750
Answer: Option B
8. Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m2/hr.
(A) 0.1 to 1
(B) 3 to 6
(C) 10 to 15
(D) 15 to 20
Answer: Option B
9. Presence of __________ bacteria in water causes disease like typhoid.
(A) Aerobic
(B) Pathogenic
(C) Anaerobic
(D) Non-pathogenic
Answer: Option B
10. Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
(A) Forestation
(B) Rain
(C) Green house effect
(D) Vegetation
Answer: Option C