Q. The most matured coal out of the following is

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Q. Presence of force moisture in coal is most disadvantageous during its

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Q. Tar is a better fuel than furnace oil, because of its

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Q. With increase in moisture content of coal, its

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Q. Main constituent of natural gas is

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Q. For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will

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Q. Pick out the wrong statement.

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Q. Which of the following has the highest gross calorific value ?

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Q. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

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Q. Efficient burning of anthracite coal requires

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Q. C/H ratio is the minimum in case of

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Q. Ignition temperature decreases progressively from anthracite to lignite, because

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Q. Which of the following fuel gases is heavier than air ?

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Q. Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

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Q. Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt using theoretical amount of air in

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Q. Use of preheated air for combustion of fuel in the furnace, increases the

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Q. Which of the following can be made into briquettes without the use of a binder ?

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Q. As the equilibrium moisture content of the coal increases, its

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

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Q. During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

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