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Machine Design

Machine Design
Rankine Gordon formula for buckling is valid for

Long column
Very long column
Short column
Short and long column

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Machine Design
In thrust bearings, the load acts

Parallel to the axis of rotation
In any direction
Along the axis of rotation
Perpendicular to the axis of rotation

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Machine Design
The permissible stress for carbon steel under static loading is generally taken as

4000-4500 kg/cm²
3000-4000 kg/cm²
7500-10,000 kg/cm²
2000-3000 kg/m²

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Machine Design
The endurance limit of a material with finished surface in comparison to rough surface is

Less
More or less depending on quantum of load
More
Same

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Machine Design
A backing ring is used inside the pipe joint when making a

Butt weld
Socket weld
Fillet weld
Sleeve weld

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Machine Design
In the assembly of pulley, key and shaft

All the three are designed for equal strength
Key is made the weakest
Pulley is made the weakest
Key is made the strongest

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