MCQOPTIONS
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				| 1. | 
                                    Why do the 13% Cr alloy casings and tubings are used in some of the completions? | 
                            
| A. | They are Corrosion Resistant | 
| B. | They are water resistant | 
| C. | Because of their strength | 
| D. | High yield stress | 
| Answer» B. They are water resistant | |