Quiz

Question: Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
Options:
A.Neutralised by alkali treatment
B.Left as such without any treatment
C.Diluted with fresh water to reduce its acidity
D.None of these
Answer: Option A

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More Questions on This Topic :

Question 1. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
  1.    3
  2.    30
  3.    70
  4.    100
Answer: Option A
Question 2. Exposure to chemicals having carcinogenic properties cause
  1.    Dermatitis (skin disorder)
  2.    Cancer
  3.    Asphyxiation (suffocation)
  4.    Asthma
Answer: Option B
Question 3. Beyond what concentration of H₂S in air, acute danger to human life exists?
  1.    50 ppm
  2.    100 ppm
  3.    300 ppm
  4.    700 ppm
Answer: Option D
Question 4. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
  1.    Hydrogen
  2.    Carbon dioxide
  3.    Ozone
  4.    None of these
Answer: Option C
Question 5. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)
  1.    Acts as a green house gas thereby raising earth's temperature
  2.    Causes asphyxia
  3.    Causes increase in sea level
  4.    Inhances the green house effect
Answer: Option B
Question 6. What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?
  1.    Radioactive substances
  2.    Natural organic products
  3.    Inorganic pollutants
  4.    None of these
Answer: Option B

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