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| 1. |
What are primary and secondary fuels........ |
| Answer» Primary fuels- Fuels that directly produce heat on ignition are called primary fuels. They are raw fuels.\xa0Examples are wood, coal, petroleum, natural gas, animal dung, etc.Secondary fuels - Fuels that are processed and prepared from primary fuels are called secondary type of fuels.Examples are charcoal, coke, petrol, diesel, kerosene. | |