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Environmental Issues · Question 59

AIPMT 2009MCQMedium📈 Topic in 38% papers+4−1
1

Steps taken by the Government of India to control air pollution include :

  1. Permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles
  2. Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons
  3. Use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks
  4. Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel

Answer

(2) Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

Solution

Pollution Under Control (PUC) certification is compulsory for vehicles; the test checks the exhaust for carbon monoxide and unburnt hydrocarbons.

As per NCERT, the other steps are different: sulphur in diesel was reduced to 350 ppm (not 500 ppm), CNG was made compulsory only for public transport in Delhi (not all buses and trucks everywhere), and no compulsory 20% blending was ordered.

Answer: (2)

Out of syllabusAIPMT 2009

Keep practising — Environmental Issues

2

Montreal protocol aims at :

  1. Control of water pollution
  2. Biodiversity conservation
  3. Control of CO2 emission
  4. Reduction of ozone depleting substances
Out of syllabusAIPMT 2009
3

DDT residues are rapidly passed through food chain causing biomagnification because DDT is :

  1. Moderately toxic
  2. Water soluble
  3. Non-toxic to aquatic animals
  4. Lipo soluble
Out of syllabusAIPMT 2009
4

Chipko movement was launched for the protection of -

  1. Forests
  2. Livestock
  3. Wet lands
  4. Grasslands
Out of syllabusAIPMT 2009
5

A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this: (i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity (ii) The area was sprayed with DDT by an aircraft (iii) The lake water turned green and stinky (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis Which two of the above were the main causes of fish mortality in the lake?

  1. (i), (ii)
  2. (iii), (iv)
  3. (i), (iii)
  4. (ii), (iii)
Out of syllabusAIPMT 2008
6

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

  1. 2.5 or less
  2. 1.5 or less
  3. 1.0 or less
  4. 5.2–2.5
Out of syllabusAIPMT 2008
7

Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming?

  1. CFCs 14%, Methane 20%
  2. CO2 40%, CFCs 30%
  3. N2O 6%, CO2 86%
  4. Methane 20%, N2O 18%
Out of syllabusAIPMT 2008
8

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?

  1. SE < PE < S < DE
  2. SE < S < PE < DE
  3. PE < S < SE < DE
  4. S < DE < PE < SE
Out of syllabusAIPMT 2007
9

In a coal fired power plant electrostatic precipitators are installed to control emission of:-

  1. SPM
  2. SO2
  3. CO
  4. NOx
Out of syllabusAIPMT 2007
10

Which one of the following is not a bioindicator of water pollution?

  1. Blood-worms
  2. Stone flies
  3. Sewage fungus
  4. Sludge-worms
Out of syllabusAIPMT 2007
11

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is -

  1. <30 ppm
  2. <3.0 ppm
  3. <100 ppm
  4. <10 ppm
Out of syllabusAIPMT 2006

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