Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

Diametral pitch
Circular pitch
None of these
Module

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Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Seriousness would depend on other factors
Very serious in ductile materials and less serious in brittle materials
Equally serious in both types of materials
Very serious in brittle materials and less serious in ductile materials

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Machine Design
A woodruff key is

A tapered key with head at one end
Fitted in pairs at right angles
Capable of tilting in a recess milled out in the shaft
All of these

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