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FUELS AND COMBUSTION

Fuels and Combustion
A coal containing very high percentage of durain is called __________ coal.

Boghead
Bright
Splint
Non-banded

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Fuels and Combustion
Grindability index of a coal is 100. It implies that the

Coal can't be pulverised
Power consumption in grinding the coal will be very high
Coal can be pulverised with great difficulty
Coal can be easily pulverised

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Fuels and Combustion
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.

0.5
20
10
2.5

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Fuels and Combustion
The reaction, C + CO₂ ⟷ 2CO, taking place during coal gasification is called the __________ reaction. n.

Shift conversion
Boudouard
Reduction
Neumann reversal

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Fuels and Combustion
High amount of sulphur and phosphorous in coke causes

Increase in its strength
None of these
Brittleness of steel made by using it
Decrease in its calorific value

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