MCQOPTIONS
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				| 1. | 
                                    The main advantage of forced draft over natural draft is that | 
                            
| A. | combustion of fuel is complete. | 
| B. | smaller height chimney can be used. | 
| C. | furnace control is easier. | 
| D. | all (a), (b) & (c). | 
| Answer» E. | |