Q. Grindability index of a coal is 100. It implies that the

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Q. The cooling medium used in dry quenching of coke is

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Q. A particular coal is said to be free burning when it

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Q. Gobar gas is produced by the __________ of 'gobar' (cow dung).

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Q. Octane number of 2, 2, 4 - trimethyl pen-tane is

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Q. Which of the following has the highest flame speed ?

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Q. Coke ovens in steel plant are heated by

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Q. Coke oven gas is a better fuel than blast furnace gas, because of its higher

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Q. Short/intense flame is produced during combustion of gaseous fuel by using

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Q. The reaction, C + CO₂ ↔ 2CO, taking place during coal gasification is called the __________ reaction.

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Q. The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be

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Q. A good quality coal should have

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Q. High amount of sulphur and phosphorous in coke causes

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Q. The difference between total carbon and fixed carbon of coal will be minimum in case of

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Q. A sample of natural gas containing 80% methane (CH₄) and rest nitrogen (N₂) is burnt with 20% excess air. With 80% of the combustibles producing CO₂ and the reminder going to CO, the Orsat analysis in volume percent is

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Q. Which of the following would require maximum amount of % excess air for complete combustion ?

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Q. During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

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Q. Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain

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Q. Low temperature oxidation of coal is accelerated by the

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Q. By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

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