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Fuels and Combustion

Fuels and Combustion
Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.

18
6
36
28

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Fuels and Combustion
Benzol is used

For producing benzene, tolune & xylene by its distillation
Both A & B
As a motor fuel blend
Neither A nor B

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Fuels and Combustion
Which of the following is a measure of the agglutinating (i.e., binding) property of coal?

Swelling index
Caking index
Thickness of plastic layer
Gray-king index

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Fuels and Combustion
Which will have the least volatile matter and hence will be the most difficult to ignite?

Coke
Semi-bituminous coal
Bituminous coal
Aanthracite

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

2.5
10
20
0.5

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Fuels and Combustion
Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³.

1800
5400
10200
3200

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