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Machine Design

Machine Design
Rankine Gordon formula for buckling is valid for

Short column
Short and long column
Long column
Very long column

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Machine Design
Idler pulley is used for

Changing the direction of motion of belt
All of these
Increasing velocity ratio
For applying tension

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Machine Design
The acme threads are usually found on

Screw cutting lathes
Feed mechanism of machine tools
Railway carriage couplings
Spindles of bench vices

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Medium bearing
Square bearing
Short bearing
Long bearing

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.5
3.5
2.8
3.0

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Machine Design
A universal coupling is used to connect two shafts

Which are perfectly aligned
Which are not in exact alignment
Whose axes intersect at a small angle
Have lateral misalignment

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