Related Questions

Oil and grease present in an emulsified state in waste water discharged from industries can be removed by
A Biological oxidation
B Skimming off
C Settling out using chemical reagents
D Chlorination
In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction
A Heavy distillates
B Intermediate distillates
C Light ends
D Residues
Which of the following is analogous to "Refinery : Petroleum" ?
A forest : lumber
B mine : ore
C mill : grain
D generator : electricity
Which of the following is would be analogous to "Refinery Petroleum" ?
A mill : grain
B mine : ore
C warehouse : merchandise
D generator : electricity
The only private sector refinery set up by Reliance Petroleum Ltd. is located at
A Guwahati
B Jamnagar
C Mumbai
D Chennai
The import of crude oil and petroleum done from national oil companies of producer countries, which have a net exportable surplus of oil is by
A term contracts
B term tenders
C monthly tenders
D All the above
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A Neutralised by alkali treatment
B Left as such without any treatment
C Diluted with fresh water to reduce its acidity
D None of these
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
A Poor oxidation stability and high gum forming tendency
B Greater tendency of decomposition at elevated temperature
C Hydrolysis tendency in presence of water
D All of the above
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes
A Foaming
B Odour nuisances
C Undesirable plant growth
D Turbidity
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
A Radioactive
B Organic
C Inorganic
D None of these

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