Q. What kind of pH is most suitable for bioleaching in majority of the metals?

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Q. Microbes that exhibit a low tolerance or have become adapted to low concentrations of soluble heavy metals in the leach suspension should be selected for bioleaching.

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Q. Which among the following is the most suitable particle size of solid waste?

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Q. Which of the following microbial leaching techniques depend on the working volume of less than ten cubic meter (<10m3)?

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Q. FCC stands for _________

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Q. Which commercial bioleaching processes among the following involves piling up of uncrushed waste rock?

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Q. What percentage of total world copper production do bioleach of copper alone contributes?

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Q. The maximum temperature that may reach in the interior dump of copper bioleaching is ______

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Q. Some heterotrophic bacteria are present in the copper dumps which indirectly affect metal ________ by affecting the growth and activity of metal solubilizing _______

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Q. Which of the following mechanism is used for bioleaching of uranium?

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Q. Acidithiobacillus sp. is used to extract what kind of metal ore?

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Q. Which leaching agent is used for the slow decomposition of refractory gold ores?

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Q. In the studies of Joffe and Sperll, it was observed that ________ is efficient for solubilizing Ni but the presence of ______ had adverse effect on leaching.

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Q. Which type of ore is the major source of nickel?

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Q. Bacterial leaching is possible with low concentrations and requires little energy inputs.

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Q. Phosphorus accumulating microbes can store phosphorus in their cells.

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Q. Which of the following can absorb dissolved phosphorus from sewage sludge?

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Q. Which of the following systems helps to remove phosphate in activated sludge system?

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Q. Which of the following is not a major concern for removing phosphate from wastewater?

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Q. Which of the following treatment involves addition of metal salts?

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