GEOLOGY EXPERTS ONLY Multiple choice 1. Before metals are recovered from their o
ID: 106406 • Letter: G
Question
GEOLOGY EXPERTS ONLYMultiple choice
1. Before metals are recovered from their ore concentrates by smelting, they are often roasted to A)decrease volatility B)convert from sulfides to oxides C)make them hot enough for smelting D) decrease their volume to fit into the furnace
2. Fly ash is produced by A) pollutant gases from burning coal that condense on dust particles suspended in air B)an incombustible residue of coal burning comprising fine mineral particles that are emitted in air by chimneys C) a mix of co2, CO, sulfur dioxide emitted by burning coal D) water vapour from burning coal that condenses in air
3. Large metal bearing poryphyry deposits usually form A) at convergence zones B)at spreading plate boundaries C) inlands of large stable cratons D) in large sedimentary basins GEOLOGY EXPERTS ONLY
Multiple choice
1. Before metals are recovered from their ore concentrates by smelting, they are often roasted to A)decrease volatility B)convert from sulfides to oxides C)make them hot enough for smelting D) decrease their volume to fit into the furnace
2. Fly ash is produced by A) pollutant gases from burning coal that condense on dust particles suspended in air B)an incombustible residue of coal burning comprising fine mineral particles that are emitted in air by chimneys C) a mix of co2, CO, sulfur dioxide emitted by burning coal D) water vapour from burning coal that condenses in air
3. Large metal bearing poryphyry deposits usually form A) at convergence zones B)at spreading plate boundaries C) inlands of large stable cratons D) in large sedimentary basins
Multiple choice
1. Before metals are recovered from their ore concentrates by smelting, they are often roasted to A)decrease volatility B)convert from sulfides to oxides C)make them hot enough for smelting D) decrease their volume to fit into the furnace
2. Fly ash is produced by A) pollutant gases from burning coal that condense on dust particles suspended in air B)an incombustible residue of coal burning comprising fine mineral particles that are emitted in air by chimneys C) a mix of co2, CO, sulfur dioxide emitted by burning coal D) water vapour from burning coal that condenses in air
3. Large metal bearing poryphyry deposits usually form A) at convergence zones B)at spreading plate boundaries C) inlands of large stable cratons D) in large sedimentary basins
Explanation / Answer
1)B)convert from sulfides to oxides
2)B)an incombustible residue of coal burning comprising fine mineral particles that are emitted in air by chimneys.
3)A) at convergence zones .
Large metal-bearing porphyry deposits typically form at subducting plate boundaries.
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