Which of the following sources is responsible for maximum air pollution ?

Related Mcqs:

1. From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?

   A. 5
   B. 50
   C. 500
   D. 5000

2. 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?

   A. 3
   B. 30
   C. 7
   D. 70

3. Which of the following acts as a natural source of air pollution ?

   A. Forest fire
   B. Deforestation
   C. Volcanic eruption
   D. None of these

4. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is_________________?

   A. 1.72
   B. 0.58
   C. 0.5
   D. 0.2

5. A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

   A. 380
   B. 630
   C. 760
   D. 880

6. Which of the following is a manmade source of air pollution ?

   A. Automobile exhaust
   B. Forest fire
   C. Bacterial action in soil and swamp areas
   D. All A., B. and C.

7. 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

8. Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?

   A. Thermosphere
   B. Stratosphere
   C. Troposphere
   D. Mesosphere

9. The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

   A. Ionosphere
   B. Troposphere
   C. Stratosphere
   D. None of these

10. Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?

    A. Benzopyrene
    B. Peroxyacetyl nitrate
    C. Carbon monoxide
    D. Sulphur dioxide