Q. Oxygen percentage (by weight) in atmospheric air is

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Q. Pure carbon is completely burnt in oxygen. The flue gas analysis is 70% CO₂, 20% CO and 10% O₂. The percent excess oxygen used is

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Q. Atomising steam to fuel oil ratio in a burner should be around

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Q. Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

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Q. Dry air required to burn 1 kg of carbon completely may be around __________ kg.

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Q. Pick out the wrong statement.

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Q. Fusion point of coal ash increases with increase in its __________ content.

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Q. For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

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Q. Fat coal' means a coal having

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Q. Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

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Q. Presence of phosphorous in metallurgical coal

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Q. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

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Q. Softening temperature of coal ash is a measure of the __________ of coal.

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Q. Higher fuel combustion efficiency can not be achieved by

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Q. __________ prohibits the use of alcohols directly in petrol engines.

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Q. The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

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Q. __________ present in coal is not determined in its ultimate analysis.

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

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Q. Percentage of methane in coke oven gas may be around

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Q. __________ has the widest inflammability limit (explosion limit) of all the gases.

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