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Fuels and Combustion

Fuels and Combustion
Which of the following has the highest calorific value (kcal/Nm³) ?

Gobar gas
LPG
Natural gas
Carburetted water gas

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Fuels and Combustion
Junker's calorimeter is used to determine the calorific value of

Fuel oil
None of these
Pulverised coal
Gaseous fuels

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

20
2.5
0.5
10

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Fuels and Combustion
Which of the following petrographic constituents of coal is non-coking?

Clarain
Durain
Fussain
Vitrain

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Fuels and Combustion
The advantage of firing pulverised coal in the furnace lies in the fact, that it

Accelerates the burning rate and economises on fuel combustion
All of these
Permits the use of high ash content coal
Permits the use of low fusion point ash coal

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Fuels and Combustion
Which of the following is called "blue gas"?

Producer gas
Coke oven gas
Natural gas
Water gas

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