This set of Environmental Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Management of Mine Waste Soil”.
1. Which of the following methods does not lead to the generation of mine wastes?
a) Extraction of minerals
b) Beneficiation of minerals
c) Processing of minerals
d) Remediation of mine waste
View Answer
Explanation: Generated mine wastes is caused as a result of various human activities of extraction the minerals from the Earth like Extraction of minerals, Beneficiation of minerals and Processing of mineral but remediation of mineral waste does not generate waste but help in reducing the mine wastes.
2. The first phase that leads to removal of ore is called as _______
a) Extraction
b) Beneficiation
c) Processing
d) Remediation
View Answer
Explanation: Extraction is the first method that leads to removal of ore form the Earth which is followed by benefication and processing whereas remediation is management of the wastes generated.
3. The materials that are left after the successful separation of the valuable fraction from the ore is called as Tailings.
a) True
b) False
View Answer
Explanation: After separation of the materials that are important for the industry or are valuable are separated and the materials that are left over after the extraction from the ore is called as Tailings.
4. Tailings suspended in the water can damage the environment by releasing toxic metals.
a) True
b) False
View Answer
Explanation: Tailings often remain suspended in the water and they have the potential to damage the environment by releasing toxic metals into the environment leading to increases rates of pollution and contamination of the environment.
5. Which of the following term is not used in place of the term “Tailings”?
a) Mine dumps
b) Culm dumps
c) Terra-coned
d) Mine drainage
View Answer
Explanation: Mine dumps, Culm dumps and Terra-coned are also called as tailings, means the material remains after the process of successful separation of the beneficiary material from the ore whereas mine drainage is the flow of acidic water from mines as a waste product.
6. Which of the following is not an after effects of the toxic metals released during tailings?
a) Erosion
b) Sinkholes
c) Contamination
d) Nutrient absorption
View Answer
Explanation: Erosion, Sinkholes and Contamination are caused due to the toxic metals released during tailings which causes a potential harm to the environment whereas nutrient absorption is a process by which the nutrient is absorbed from the soil, which is not an issue in this case.
7. Which of the following compound is used in the extraction of gold mining?
a) Liquid Nitrogen
b) Cyanide
c) Oxygen
d) Ammonia
View Answer
Explanation: Cyanide is used in the extraction in gold mining to separate the gold from the unwanted and uneconomic materials whereas, Liquid Nitrogen is used to break the cell walls of a cell, and Oxygen and ammonia are not used for extraction for gold mining .
8. Tailings is an output of which phase of mining?
a) Extraction
b) Beneficiation
c) Processing
d) Remediation
View Answer
Explanation: Tailings is an output of the benefication process and not of the other process like beneficiation, Processing and Remediation.
9. Which of the following condition is caused due to tainings?
a) Acid mine drainage
b) Nutrient absorption
c) Air contamination
d) Afforestation
View Answer
Explanation: Acid mine drainage is caused due to tailings method in which acidic water flows from mines as a waste product Nutrient absorption and air contamination are not caused due to the process of tailings and afforestation is the planting of trees.
10. Mill tailings is radioactive.
a) True
b) False
View Answer
Explanation: Mill tailings is a mining waste which consists of radium and hence, it is radioactive.
11. Which of the following methods is not included for disposal of tailings methods?
a) Submarine Tailings Disposal
b) Dry sacking
c) Phytostabilisation
d) Afforestation
View Answer
Explanation: Submarine Tailings Disposal, Dry sacking and Phytostabilisation are different disposal methods used for removal of tailings and afforestation is the planting of trees.
12. When the open pit mines are refilled with the tailings is called as ________
a) Pond storage
b) Extraction
c) Beneficiation
d) Processing
View Answer
Explanation: Pond storage is the process which is used to dispose tailings in open pit mines by filling it with the waste and Extraction, Beneficiation and Processing are the phases for separation of minerals from the ores.
13. Mining industry can try to stabilize the environmental pollution by plantation.
a) True
b) False
View Answer
Explanation: The pollution and contamination of the environment problems caused by mining industry can be minimized by plantation.
14. Acaccia mangium is considered an ideal plant for bioreclamation of overburden dumps.
a) True
b) False
View Answer
Explanation: The pollution and contamination of the environment problems caused by mining industry can be minimized by plantation and Acaccia mangium is a plant which is often used for bioreclamation of overburden dumps.
15. Phyto stabilization is a technique of remediation where plants are used for removal of tailings from the environment by sequestering pollutants in areas near the roots.
a) True
b) False
View Answer
Explanation: Phyto stabilization is a type of phyto remediation technique in which plants are used removing tailings by sequestering the various pollutants in the mine soils near the roots.
Sanfoundry Global Education & Learning Series – Environmental Biotechnology.
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