MCQOPTIONS
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				| 1. | 
                                    Oil is invariably used in large transformers to | 
                            
| A. | Lubricate the core | 
| B. | Insulate the core | 
| C. | Lubricate the coils | 
| D. | Provide fuel for operation | 
| Answer» C. Lubricate the coils | |