 
			 
			MCQOPTIONS
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				| 1. | If the damping ratio is equal to 1, a second-order system is _________ | 
| A. | having maginary roots of the characteristic equation | 
| B. | underdamped | 
| C. | critically damped with unequal roots | 
| D. | critically damped with equal roots | 
| Answer» E. | |