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Machine Design

Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

0.5 to 1
3 to 5
5 to 10
1 to 2

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Machine Design
All stresses produced in a belt are

Shear stresses
Tensile stresses
Compressive stresses
Both tensile and compressive stresses

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Machine Design
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

1.5 d
d
2 d
2.5 d

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Machine Design
A feather key is generally

Loose in both shaft and hub
Tight in both shaft and hub
Tight in shaft and loose in hub
Loose in shaft and tight in hub

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Machine Design
The maximum normal stress theory is used for

Non-ferrous materials
Plastic materials
Brittle materials
Ductile materials

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Machine Design
The helix angle for single helical gears ranges from

10° to 15°
15° to 20°
35° to 50°
20° to 35°

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