Machine Design
Stress concentration is caused due to

All of these
Abrupt change of section
Pitting at points or areas at which loads on a member are applied
Variation in properties of material from point to point in a member

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Machine Design
The designation M 33 × 2 of a bolt means

Bolt of 33 mm nominal diameter having 2 threads per cm
Metric threads of 33 mm outside diameter and 2 mm pitch
Metric threads of 33 numbers in 2 cm
Metric threads with cross-section of 33 mm

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Machine Design
A compound belt drive is used when

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
Shafts are arranged parallel and rotate in the same directions

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