Chemical Engineering · all questions

Fuels And Combustion
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Q261

High ash containing coke

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Q262

Presence of free moisture in coal during its high temperature carbonisation

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Q263

Which of the following gaseous fuels is likely to have the highest gross calorific value?

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Q264

Highly caking coals

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Q265

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

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Q266

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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Q267

Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces

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Q268

Out of the following fuels, the difference between the net and gross calorific value is maximum in case of

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Q269

A good metallurgical coke should have very low

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Q270

Which is the most matured coal?

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Q271

Coke compared to the coal from which it has been made, contains

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Q272

Higher fuel combustion efficiency can not be achieved by

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Q273

Pick out the correct statement.

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Q274

Higher efficiency in the combustion of solid fuel can not be achieved by

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Q275

A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

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Q276

Which of the following has the highest gross calorific value?

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Q277

Highly reactive coke have lower

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Q278

Which of the following accounts for maximum energy loss in a boiler?

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Q279

Pulverised coal used in boiler firing need not have

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Q280

Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

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