MCQOPTIONS
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				| 1. | 
                                    The economiser is used in boilers to | 
                            
| A. | Increase thermal efficiency of boiler | 
| B. | Economize on fuel | 
| C. | Extract heat from the exhaust flue gases | 
| D. | Increase flue gas temperature | 
| Answer» B. Economize on fuel | |