In power screws, if friction angle is less than lead angle , then the

1.	In power screws, if friction angle is less than lead angle , then the screw undergoes _______
A.	over hauling
B.	self locking
C.	both a. and b.
D.	none of the above
Answer» B. self locking

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In power screws, if friction angle is less than lead angle , then the screw undergoes _______

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