A shaft has two rotors mounted on it. The transverse natural frequency – McqOptions

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1.	A shaft has two rotors mounted on it. The transverse natural frequency considering each rotor separately is 100 Hz and 200 Hz respectively. The lowest critical speed is
A.	13000 rpm
B.	5367 rpm
C.	6450 rpm
D.	9343 rpm
Answer» C. 6450 rpm

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