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Machine Design

Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Height
Inside diameter
Outside diameter

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Machine Design
A feather key is generally

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

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Machine Design
The taper on cotter varies from

1 in 48 to 1 in 24
1 in 24 to 1 in 20
1 in 32 to 1 in 24
1 in 15 to 1 in 10

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Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

Less
More
Same
None of these

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Machine Design
In the levers of __________ type, the mechanical advantage is less than one.

Third
First
Second
None of these

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Larger/smaller depending on diameter of spring coil
Equal
Larger
Smaller

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