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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Q. Blast furnace gas burns with a bluish flame, because of the presence of

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Q. The calorific value of natural gas is about __________ kcal/Nm³.

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Q. Low temperature carbonisation of coal takes place at __________ °C.

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Q. Critical Air Blast (CAB) value of coke is a direct measure of its

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Q. The function of secondary combustion air is to

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Q. The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

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Q. Which of the following is called "blue gas" ?

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Q. Caking index of a coal is a measure of its

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Q. Calorific value of furnace oil is about __________ Kcal/kg.

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Q. The main product of high temperature carbonisation of coal is

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Q. High temperature carbonisation of coal takes place at __________ °C.

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Q. Removal of hydrogen from coke oven gas

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