Related Questions

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
Which of the following is a biological method of disposal of municipal solid waste?
A Land fills
B Shredding
C Pulverization
D Composting
Which one is the correct transformation of the following sentence? A lot of people are getting hot under the collar because waste disposal is used (Make it simple)
A The use of waste disposal is getting a lot of people hot under the dollar
B The use of waste disposal is responsible for the people hot under the collar
C A lot of people are getting hotter under the collar
D None above
The least preferred technique in the disposal of Municipal Solid Waste is
A Incineration
B Composting
C Land filling
D Bricketting
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
A H2
B CH4
C CO2
D N2
__________ 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
A practical formula for determining the thickness of insulation between low voltage and high voltage windings is
A 1 + 0.2 kV mm
B 2 + 0.5 kV mm
C 4 + 0.7 kV mm
D 5 + 0.9 kV mm
A company produces five types of shirts -- A,B,C,D and E-using cloth of three qualities -- high, medium and low , using dyes of three qualities-- high, medium and low. One shirt requires 1.5 m of cloth .The following table gives respectively : The number of shirts (of each category) produced, in thousands. The percentage distribution of cloth quality in each type of shirt, and The percentage distribution of dye quality in each type of shirt. How many meters of low-quality cloth is consumed?
A 40,00 m
B 60,000 m
C 46,500 m
D 22,500 m

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