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Questions and Answers
What is the main constituent of chemical fuel for domestic and industrial purposes?
What is the main constituent of chemical fuel for domestic and industrial purposes?
- Nitrogen
- Carbon (correct)
- Oxygen
- Hydrogen
Which classification of fuels is based on whether they occur in nature or are prepared?
Which classification of fuels is based on whether they occur in nature or are prepared?
- Solid, liquid, and gaseous fuels
- Natural and synthetic fuels
- Primary and secondary fuels (correct)
- Renewable and non-renewable fuels
What is the formula used for calculating both Gross and Net calorific values?
What is the formula used for calculating both Gross and Net calorific values?
- Dulong’s formula (correct)
- Combustion formula
- Thermodynamic formula
- Stoichiometric formula
What is the measure of a fuel's resistance to knocking in internal combustion engines?
What is the measure of a fuel's resistance to knocking in internal combustion engines?
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What is the refining process of crude petroleum to produce liquid fuel?
What is the refining process of crude petroleum to produce liquid fuel?
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Study Notes
Chemical Fuels
- The main constituent of chemical fuel for domestic and industrial purposes is Hydrocarbons.
Classification of Fuels
- Fuels are classified into two categories: Natural Fuels and Artificial Fuels, based on whether they occur in nature or are prepared.
Calorific Values
- The formula used for calculating both Gross and Net calorific values is: Q = (m × ΔHc) / M, where Q is the calorific value, m is the mass of the fuel, ΔHc is the heat of combustion, and M is the molecular weight of the fuel.
Fuel Properties
- The measure of a fuel's resistance to knocking in internal combustion engines is Octane Rating.
Petroleum Refining
- The refining process of crude petroleum to produce liquid fuel is Cracking, which involves the breakdown of large molecules into smaller ones.
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