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Machine Design

Machine Design
A bench vice has following type of threads

Square
Acme
Metric
Buttress

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Machine Design
The ratio of driving tensions in V-belt drives is __________ flat belt drives.

sin α times less than
Equal to
cosec α times more than
sin α times more than

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Machine Design
The material generally used for aircraft components is

High speed steel
Aluminium
Stainless steel
Mild steel

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Machine Design
In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)

2d + 13 mm
3.5d
2d + 20 mm
d + 17 mm

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Machine Design
Guest's theory is used for

Elastic materials
Brittle materials
Ductile materials
Plastic materials

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

67.5°
90°
45°
22.5°

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