Назад
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9. Smelter emissions result in
A. acid rains.
B. deforestation.
C. acidification of soil.
D. depletion of reserves.
10. Coal combustion does NOT contribute significantly to atmospheric
deposition of
A. arsenic.
B. cadmium.
C. nitrogen.
D. chromium.
11. “Elevated concentrations” mean
A. increased concentrations.
B. decreased concentrations.
C. equal concentrations.
D. similar concentrations.
12. … is found in elevated concentration in vicinity of oil refineries.
A. Lead
B. Vanadium
C. Oxygen
D. Uranium
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13. As a result of exposure to radioactive iodine, humans are prone to
A. skin cancer.
B. allergy.
C. thyroid cancer.
D. lung cancer.
14. The accident at Chernobyl nuclear plant took place in
A. 1986.
B. 1988.
C. 1987.
D. 1990.
15. Naturally nitrous oxide is produced mainly by
A. bacteria.
B. fertilization.
C. plants.
D. man.
16. The identification and characterization of risk level resulting from
exposure of hazards is called
A. clinical toxicology.
B. risk assessment.
C. hazard control.
D. risk monitoring.
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17. The term which does NOT describe the disposition of xenobiotics is
A. absorption.
B. distribution.
C. extraction.
D. excretion.
18. Absorption indicates
A. transformation.
B. local and overall accumulation.
C. entry.
D. removal from the body of the xenobiotic.
19. “Host” is referred to the organism that
A. introduces xenobiotics.
B. receives xenobiotics.
C. resists xenobiotics.
D. rejects xenobiotics.
20. Cadmium increases the risk of the following disease:
A. allergy
B. brain
C. heart
D. nervous system
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44
Chapter 3. Mineral Exploration
Test 1
Read the statements below. For each question, mark the correct letter A,
B, C or D.
1. What is the type of Russian gold production deposit?
A. metalliferuos
B. pebble
C. alluvial
D. detrital zircons
2. What is the term for something produced by the action of a river or
stream?
A. fluvial
B. littoral
C. offsore
D. tidal
3. How thick is the Witwatersrand supergroup?
A. 6000 m
B. 3000 m
C. 5000 m
D. 7000 m
4. What is the term for a group of green micaceous minerals which are
hydrous silicates of aluminium, magnesium and ferrous iron?
A. chlorite
B. sericite
C. osmium
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D. pyrite
5. What is a mineral deposit precipitated from a hot, aqueous solution?
A. sedimentary deposit
B. greenschist deposit
C. porous deposit
D. hydrothermal deposit
6. Which of the arguments is NOT in favor of a Witwatersrand placer
origin?
A. the gold is crystalline
B. strong spatial correlation between gold, uraninite, and unequivocally
detrital zircon
C. the intimate relationship between the heavy minerals and the
sedimentary structures and environment
D. the equal intensity of mineralisation in porous conglomerates
7. What is amount of modern gold production in the Witwatersrand Basin?
A. 45 %
B. 16 %
C. 37 %
D. 50 %
8. Where did Anglo-American move its headquarters to?
A. Washington
B. New-York
C. Johannesburg
D. London
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9. What is the term for a mining method used extensively in the flat dipping
South African gold fields but is little seen elsewhere?
A. jackleg drilling
B. breast stooping
C. mechanized mining
D. blasting
10. For how many years will nowadays exploration areas be granted under
the 2002 Mineral and Petroleum Development Act?
A. 7 years
B. 6 years
C. 5 years
D. 4 years
11. Where was the mechanization mostly successful?
A. wide stopes
B. narrow stopes
C. gullies
D. breast stopes
12. What does backfilling mean?
A. holes in the rock to place an explosive
B. a sudden and violent rock failure
C. waste material used to fill the void created by mining
D. a vertical hole between mine levels used to move ore
13. What is the antonym for the word “footwall”?
A. flank
B. top
C. bottom
D. floor
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14. What is the term for money generated by all of a company‟s operations,
before deduction and tax?
A. unit cost
B. gross revenue
C. tax rate
D. taxable income
15. In what year did President Nixon stop the fixed link between dollar and
gold?
A. 1966
B. 1967
C. 1968
D. 1969
16. What is the definition for “cross-bedding”?
A. refers to inclined sedimentary structure in a horizontal unit of rock
B. refers to the method of excavating a vertical or near-vertical tunnel
from the top down
C. the part of a rock formation that appears above the surface
D. a hole or passage made by a drill
17. What process of extraction was developed by three Scottish chemists in
1887?
A. high pressure jets
B. cementation
C. amalgamation
D. cyanidation
18. What method was used to discover the Free State Goldfield?
A. seismic
B. gravity
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C. magnetic
D. electrical
19. When were seismic reflection surveys used for detailing the structure and
location of the Central Rand Group rocks at depth?
A. 1980s
B. 1990s
C. 1970s
D. 1960s
20. What helped to speed up exploration in Witwatersrand?
A. enormous investments
B. seismic surveys
C. application of oil drilling rigs
D. gravity surveys
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Test 2
Read the statements below. For each question, mark the correct letter A,
B, C or D.
1. How deep can Witwatersrand mines reach?
A. 2500 meters
B. 3500 meters
C. 4500 meters
D. 5500 meters
2. What is the term for something containing metal, used for a mineral
deposit or an ore?
A. ore-free
B. alluvial
C. barren
D. metalliferuos
3. What is the synonym for a placer deposit?
A. metalliferuos
B. pebble
C. alluvial
D. detrital zircons
4. What is the term for a mineral that has brassy-yellow metallic colour and is
mistaken for Gold or 'Fools Gold‟?
A. chlorite
B. sericite
C. osmium
D. pyrite
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5. What is the term for something being, related to, or composed of crystal or
crystals?
A. crystalloid
B. crystalline
C. porous
D. crystallization
6. What element is used by geologists to identify the West Rand Group?
A. uraninite
B. pyrite
C. osmium
D. magnetic iron
7. How many major gold fields have been identified in the Witwatersrand?
A. 7
B. 8
C. 9
D. 10
8. When did Anglo-American move its headquarters?
A. 1994
B. 2004
C. 1990
D. 2000
9. Which company was not a major operator in the Witwatersrand in 2004?
A. Anglogold Ashanti
B. Gold Fields
C. Western Areas
D. Harmony Gold Mining