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Machine Design

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Buttress
Acme
Square
Metric

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Machine Design
The period during which the cam follower remains at rest, when cam moves, is known as

Idle period
Fixed period
Dwell period
Constant period

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Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Ease of manufacture
Fullering and caulking
Reducing stress concentration
Safety

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

None of these
0.40 to 0.60%
0.20 to 0.40%
0.35 to 0.45%

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Machine Design
The included angle in unified of American National threads is

55°
60°
47°
29°

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

90°
67.5°
45°
22.5°

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