Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Medium series whose bore is 25 mm
Light series whose bore is 25 mm
Light series whose bore is 5 mm
Medium series whose bore is 5 mm

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

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

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Machine Design
A compound belt drive is used when

Shafts are arranged parallel and rotate in the same directions
None of these
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged at right angles and rotate in one definite direction

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