In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

In order to ensure self locking in a screw jack, it is essential that

1.	In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
A.	Larger than
B.	Smaller than
C.	Equal to
D.	None of these
Answer» C. Equal to

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In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

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