Fuels and Combustion MCQs
Practice free Fuels and Combustion multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 590 questions — no login required.
Question 1hard
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
Question 3hard
Fusion point of coal ash generally varies from 1000 to 1700°C. Ash having fusion point less than __________ °C is liable to form clinker.
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Question 5hard
Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
Question 6medium
Which of the following combustibles is absent in blast furnace gas?
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Question 7medium
Which of the following would require maximum amount of % excess air for complete combustion?
Question 8hard
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
Question 9hard
Calorific value of gobar gas (containing CH4 = 60%, H2 = 10%, CO2 = 30%) may be about __________ Kcal/Nm3.