MCQOPTIONS
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				| 1. | 
                                    Investment material used for cobalt-chromium alloys is_____________? | 
                            
| A. | Gypsum bonded | 
| B. | Phosphate bonded | 
| C. | Silica bonded | 
| D. | None of the above | 
| Answer» C. Silica bonded | |