| 1 |
When did natural rubber production started in Sri Lanka (Ceylon)? |
1900 A.D
1850A.D
1880A.D
1857A.D
|
| 2 |
At present, world's 91.5% percent natural rubber produces in: |
South-east Asia
Sri Lanka
Brazil
African countries
|
| 3 |
Hevea brasiliensis's smuggled rubber seeds from Brazil were propagated in London's: |
Kew Gardens
LawrenceGardens
WahGardens
MayoGardens
|
| 4 |
When did regular rubber export started from South America-Brazil ? |
1750 A.D
1852 A.D
1857 A.D
1900 A.D
|
| 5 |
In 1839 A.D., Charles Goodyear from rubber prepared: |
Tyre and tube
Vulcanized rubber
Erasing rubber
Rubber goods
|
| 6 |
Hevea brasiliensis plant provide world's: |
50 percent natural rubber
95 percent natural rubber
One-third percent natural rubber
Small amount of natural rubber
|
| 7 |
For rubber plant plantation, which soil is most suitable? |
Marshy land
Sandy soil
Clayey soil
Red soil with excessive phosphorus & humus
|
| 8 |
For best vegetative growth of natural rubber plant: |
There is not any need of rainfall
Small amount of rainfall is enough
70-100 inches rainfall is needed
Only 30 inches rain-fall is enough
|
| 9 |
For best propagation of natural rubber plant: |
80<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>F(27<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>C) temperature is best suitable
100<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>F temperature is suitable
50<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>F temperature is suitable
32<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>F temperature is suitable
|
| 10 |
For propagation of rubber plant: |
Equatorial warm-humid climate is suitable
Desert climate is suitable
Monsoon climate is suitable
Sudani climate is suitable
|
| 11 |
Most of the natural rubber production in the world is being used: |
For manufacturing water proof cloth
For manufacturing tyre & tube
For manufacturing toys
For manufacturing utensils
|
| 12 |
Natural rubber's plant matures for rubber production: |
At the age of 5 years
At the age of 10 years
At the age of 3 years
At the age of 15 years
|
| 13 |
At present, world's 80 percent natural rubber is produced in: |
South-east Asia
Sri Lanka
Brazil
African countries
|
| 14 |
At present, Brazil produce world's only: |
10 percent rubber
20 percent rubber
One percent rubber
30 percent rubber
|
| 15 |
From Malaysia, first time rubber export started in: |
1870 A.D
1905 A.D
1900 A.D
1920 A.D
|
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