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Fuels and Combustion MCQs

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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 577easy

Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

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Question 578easy

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

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Question 579easy

During the carbonisation of coal

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Question 580easy

Which of the following has the highest flame velocity?

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Question 581easy

As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

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Question 582easy

KOH solution used in orsat apparatus absorbs

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Question 583easy

If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

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Question 584easy

Which of the following has the highest calorific value (kcal/Nm³)?

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Question 585easy

Which of the following has the least calorific value (kcal/Nm³)?

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