Q. Which of the following petrographic constituents of coal is non-coking ?

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

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

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

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

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

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

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Q. Higher fuel combustion efficiency can not be achieved by

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Q. Softening temperature of coal ash is a measure of the __________ of 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. Presence of phosphorous in metallurgical coal

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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. Fat coal' means a coal having

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

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

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Q. Pick out the wrong statement.

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

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

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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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