Machine Design
A tapered key which fits in a key way in the hub and is flat on the shaft, is known as

Wood ruff key
Gib-head key
Flat saddle key
Feather key

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

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

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