MCQOPTIONS
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				| 1. | 
                                    How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________? | 
                            
| A. | 24 hours | 
| B. | 1-2 days | 
| C. | 3-5 days | 
| D. | 7 days | 
| Answer» D. 7 days | |