Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?

Related Mcqs:

1. Radioactive solid nuclear wastes are disposed off by _________________?

   A. High temperature incineration
   B. Pathological incineration
   C. Pyrolysis
   D. Underground burial in concrete containers

2. What are the methods of treatment & disposal of radioactive wastes ?

   A. Evaporation & chemical precipitation
   B. Biological methods & adsorption in ion exchange materials
   C. Fixing into a solid mass with cement and sinking deep in the sea
   D. All A., B. & C.

3. Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

   A. 100
   B. 1000
   C. 400
   D. 4000

4. _____________ plant emits large amount of SO2 as an air pollutant?

   A. Nitric acid
   B. Sulphuric acid
   C. Chlor alkali
   D. Iron & steel

5. The biological decomposition of organic substances in wastes controlled conditions is called_________________?

   A. Incineration
   B. Biological oxidation
   C. Composting
   D. None of these

6. Which of the following is not a practical method of low level radioactive waste disposal ?

   A. Dilution with inert material
   B. Discharging to atmosphere through tall stacks after dilution
   C. Disposing off in rivers & oceans
   D. Filling in steel crates and shooting it off out of earth’s gravity

7. World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?

   A. Arizona (U.S.A.)
   B. Chernobyl (undivided U.S.S.R.)
   C. Pennsylvania (U.S.A.)
   D. Moscow (U.S.S.R.)

8. Radioactive substances present in the polluted water stream can be removed by_________________?

   A. Biological oxygen treatment
   B. Coagulation and filtration
   C. Adsorption in ion exchange materials
   D. None of these

9. 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

10. Which of the following pollutants is absent in the emissions from a fertiliser plant ?

    A. SO2 & SO3
    B. NO2
    C. NH3
    D. CO