In a differential band brake, as shown in fig.1the length OA is great – McqOptions

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1.	In a differential band brake, as shown in fig.1the length OA is greater than OB. In order to apply the brake, the force at C should____.
A.	be zero
B.	act in upward direction
C.	act in downward direction
D.	none of the above
Answer» D. none of the above

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