MCQOPTIONS
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				| 1. | 
                                    Torsional vibrations are said to occur when the particles of a body moves | 
                            
| A. | Perpendicular to its axis | 
| B. | Parallel to its axis | 
| C. | In a circle about its axis | 
| D. | None of these | 
| Answer» D. None of these | |