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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Brittle
Elastic
Ductile
Plastic

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Machine Design
The groove angle of pulleys for V-belt is

340 to 360
420 to 450
More than 400
300 to 320

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Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

1-3 m/s
15-30 m/s
3-15 m/s
30-50 m/s

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Machine Design
The lead angle of a worm is 22.5°. Its helix angle will be

90°
67.5°
22.5°
45°

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Mitre gears
Internal bevel gears
Crown bevel gears
Angular bevel gears

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Machine Design
The value of stress concentration factor depends upon

Material and geometry of the part
None of these
Geometry of the part
Material of the part

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