 
			 
			MCQOPTIONS
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				| 1. | A pin-jointed plane frame is unstable if (Where m is number of members, r is reaction components and j is number of joints) | 
| A. | (m + r) < 2j | 
| B. | (m + r) = 2j | 
| C. | (m + r) > 2j | 
| D. | None of the above | 
| Answer» B. (m + r) = 2j | |