 
			 
			MCQOPTIONS
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				| 1. | The form of microcrack nucleation equation is_________ | 
| A. | ( <sub>s</sub>- <sub>i</sub>)nb = 2 <sub>s</sub> | 
| B. | ( <sub>s</sub>- <sub>i</sub>)nb = 3 <sub>s</sub> | 
| C. | ( <sub>s</sub>- <sub>i</sub>)nb = 4 <sub>s</sub> | 
| D. | ( <sub>s</sub>- <sub>i</sub>)nb = 8 <sub>s</sub> | 
| Answer» B. ( <sub>s</sub>- <sub>i</sub>)nb = 3 <sub>s</sub> | |