ENVIRONMENTAL POLLUTION & CONTROL MCQS 17

ENVIRONMENTAL POLLUTION & CONTROL  MCQS 17

1. Beyond what concentration of H2S in air, acute danger to human life exists?
(A) 50 ppm
(B) 100 ppm
(C) 300 ppm
(D) 700 ppm
Answer: Option D

2. Presence of high concentration of ozone and smog in atmospheric air causes the
(A) Embrittlement & decrease of folding resistance of paper
(B) Cracking of rubber products
(C) Fading of dye on textiles
(D) Damage of electrical insulator on high tension power line
Answer: Option B

3. Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
(A) Moderately
(B) Highly
(C) Extremely
(D) Very extremely
Answer: Option D

4. Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
(A) Smog & ozone
(B) Hydrogen fluoride & nitrogen oxides
(C) Sulphur dioxide & spray of weed killers
(D) Carbon monoxide
Answer: Option D

5. Carbonaceous particles having size less than 1 μm are called
(A) Grit
(B) Aggregates
(C) Aerosols
(D) Smoke
Answer: Option D

6. Exposure to chemicals having carcinogenic properties cause
(A) Dermatitis (skin disorder)
(B) Cancer
(C) Asphyxiation
(D) Asthma
Answer: Option B

7. White smoke coming out of the chimney of a furnace indicates the use of
(A) Low excess air
(B) Very high excess air
(C) Gaseous fuel in the furnace
(D) Liquid fuel in the furnace
Answer: Option B

8. High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
(A) Cancer
(B) Silicosis
(C) Respiratory disease (e.g., asthma)
(D) Reduced crop yield
Answer: Option A

9. Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in
a thermal power plant is the
(A) Gravity settling chamber
(B) Cyclone separator
(C) Electrostatic precipitator
(D) Bag filter
Answer: Option C

10. A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
(A) Global warming
(B) Green house
(C) Atmospheric effect
(D) Ionosphere
Answer: Option B