| 1 |
Quality of coal depends upon: |
- A. Carbon content of coal
- B. Hydrogen content of coal
- C. sulphur content of coal
- D. Silicon content of coal
|
| 2 |
In lignite coal, carbon content may be: |
- A. Only 10 percent
- B. 45 - 65percent
- C. Up to 25percent
- D. Up to 90percent
|
| 3 |
In peat coal, carbon content may be: |
- A. Up to 20 percent
- B. Up to 30 percent
- C. Up to 80 percent
- D. Up to 70 percent
|
| 4 |
Among all categories lignite coal is: |
- A. Most superior
- B. Most inferior
- C. Not good quality
- D. Not superior quality
|
| 5 |
World's 28 percent reserves of coal are in the continent of: |
- A. North America
- B. Europe
- C. Australia
- D. South America
|
| 6 |
In the continent of South America, coals reserves are: |
- A. 20 percent of the total reserves
- B. About 30 percent of total reserves
- C. 80 percent of the total reserves
- D. Only 1.6 percent of total reserves
|
| 7 |
World's 80 percent coal production consists of: |
- A. Bituminous coal
- B. Lignite coal
- C. Anthracite coal
- D. Brown coal
|
| 8 |
In more than 5000 manufacturings, coal is used as: |
- A. Raw material
- B. Not as a raw material
- C. Can be used as a raw material
- D. Cannot be used as a raw material
|
| 9 |
In bituminous coal, carbon content may be: |
- A. 20 percent
- B. 50 percent
- C. 60-80 percent
- D. 30 percent
|
| 10 |
In the earth's crust, coal formation began during carboniferous period which spanned: |
- A. 360 to 290 million years before present
- B. 500 million years before present
- C. 100 million before present
- D. 50 million years before present
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