Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?

Related Mcqs:

1. ‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?

   A. Dust & mists
   B. Smoke & fumes
   C. Photochemical smog & soot
   D. None of these

2. 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

3. Which of the following is not a source of ozone emission in the atmosphere?

   A. Refrigerators
   B. Xerox machines
   C. Dermatological photo-therapy equipments
   D. High voltage electrical equipments

4. 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

5. The main industrial source of emission of hydrogen sulphide air pollutant is________________?

   A. Petroleum refineries
   B. Coal based thermal power plants
   C. Pulp and paper plant
   D. Metallurgical roasting & smelting plant

6. Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

   A. CO
   B. SO2
   C. NOx
   D. CFC (chloro fluoro carbons)

7. Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?

   A. CO2
   B. H2
   C. SO3
   D. N2

8. Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?

   A. Thermal power plant
   B. Petroleum refinery
   C. Nitric acid plant
   D. Sulphuric acid plant

9. 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?

   A. Hydrogen
   B. Carbon dioxide
   C. Ozone
   D. None of these

10. Thermal pollution due to excessive heat & temperature in the working place causes__________________?

    A. Reduction in working efficiency of manpower
    B. Fatigue
    C. High breathing rate
    D. All A., B. & C.