1 |
World's 80percent coal production consists of: |
Bituminous coal
Lignitecoal
Anthracitecoal
Browncoal
|
2 |
Anthracite deposits account for how much of global coal deposits ? |
5 percent
10 percent
20 percent
80 percent
|
3 |
Among all categories lignite coal is: |
Most superior
Most inferior
Not good quality
Not superior quality
|
4 |
In 18th century, due to use of petroleum and natural gas: |
Demand of coal became less
No change took place in use of coal
Coal demand increased
Coal mining was almost stopped
|
5 |
World's 80 percent coal production consists of: |
Bituminous coal
Lignite coal
Anthracite coal
Brown coal
|
6 |
In bituminous coal, carbon content may be: |
20 percent
50 percent
60-80 percent
30 percent
|
7 |
Anthracite deposits account for how much of global coal deposits? |
5 percent
10 percent
20 percent
80 percent
|
8 |
In anthracite coal, pure carbon content is: |
50 percent
25 percent
80 percent
92 to 95 percent
|
9 |
In the earth's crust, coal formation began during carboniferous period which spanned: |
360 to 290 million years before present
500 million years before present
100 million before present
50 million years before present
|
10 |
Best quality of coal is: |
Anthracite
Bituminous
Lignite
Peat
|
11 |
Among all categories lignite coal its: |
Most superior
Most inferior
Not good quality
Not superior quality
|
12 |
Black colour of coal is due to its: |
Carbon content
Hydrogen content
Sulphur content
Phosphorous content
|
13 |
If we continue to use coal at this rate, its reserves are enough for: |
50 years only
100 years
1000 years
300-400 years
|
14 |
Coal reserves are: |
Exhaustable source of energy
Un-exhautable source of energy
Renewable source of energy
Ever increasing resources of energy
|
15 |
In more than 5000 manufacturings, coal is used as: |
Raw material
Not as a raw material
Can be used as a raw material
Cannot be used as a raw material
|