Q.

Which of the following is not true about concentricity of teeth?

A. fluctuating velocity will be noticed when not concentric
B. can be checked by using projector
C. inaccuracy of parts when not concentric
D. should be tested to ensure the proper heat treatment
Answer» D. should be tested to ensure the proper heat treatment
Explanation: concentricity of teeth is an important item and should be checked to ensure that the set up and equipment is in good order. when teeth are not concentric then fluctuating velocity will be noticed on the pitch line while transmitting motion.
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