Engineering :: Theory of Machines

@ : Home > Mechanical Engineering > Theory of Machines

The secondary critical speed of a shaft occurs at

[A].	Half the primary critical speed	[B].	Twice the primary critical speed
[C].	Four times the primary critical speed	[D].	Occurs only when there are more than 2 rotors on a shaft
[E].	If the externam exciting system has a frequency other than the primary critical speed

Answer: Option B