MCQOPTIONS
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				| 1. | 
                                    Use of excess of combustion air in the combustion of fuels results in | 
                            
| A. | heat losses. | 
| B. | long flame. | 
| C. | condensation of water vapour from the fuel gas. | 
| D. | none of these. | 
| Answer» B. long flame. | |