Related Questions

Which of the processes is used to dispose the radioactive wastes?
A ground storage
B ocean disposal
C landfills
D vary based on activity
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Ceramic nuclear metals compared to solid nuclear metals have
A higher melting points
B low strength at high temperature
C more chances of radiation damage
D poorer corrosion resistance
Which one of the following in not a major source of solid wastes?
A Residences
B Streets
C Schools
D Markets
What is the amount of solid wastes generated in Dhaka city currently ?
A 3,500-4.000 tones per day
B 9,500— 10.000 tones per day
C 12.500-13.000 tones per day
D None of the above
Which of the following types of nuclear reactors is most prone to radioactive hazards?
A Gas cooled reactor
B Molten Sodium Reactor
C Boiling water reactor
D Pressurised water reactor
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 Pensylvania (U.S.A.)
D Moscow (U.S.S.R.)
__________ extractor is used for the concentration of radioactive nuclear waste.
A Pulsed column
B Seive plate
C Mixer-settler
D Ballman
Radioactive nuclear waste is treated in
A Mixer-settler extractor
B Rotating-disc contactor
C Pulsed column extractor
D Bollman extractor

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