Fuel combustion is never cent per cent efficient due to___________________?
Correct answer: D. All A., B. and C.
- A. Incomplete combustion
- B. Dry gas/stack gas loss
- C. Moisture loss
- D. All A., B. and C.
Explanation
Combustion loses energy through unburned fuel, heat carried away in dry stack gas, and the heating or vaporisation of moisture. These correspond to incomplete-combustion, dry-gas, and moisture losses, so all apply.
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