In measuring the chordal thickness, the vertical scale of a gear toot – McqOptions

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1.	In measuring the chordal thickness, the vertical scale of a gear tooth caliper is set to the chordal or corrected addendum to locate the caliper jaws at the pitch line.If a = addendum, t = circular thickness of tooth at pitch diameter D, then chordal thickness is equal to
A.	a + t/D
B.	a + t2/D
C.	a + t3/2D
D.	a + t2/4D
Answer» E.

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