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Machine Design

Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

270°
120°
180°
360°

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Machine Design
When a bolt is subjected to an external load, the stress induced in the bolt will be

Combined tensile and shear stress
Shear stress
Tensile stress
Any one of these

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Both A and B
Right hand
Left hand
None of these

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Machine Design
The maximum bending stress in a curved beam having symmetrical section always occur at the

Neutral axis
Inside fiber
Centroidal axis
Outside fiber

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/4σt
pd/σt
pd/2σt
pd/3σt

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

Equal to 50%
Less than 50%
None of these
More than 50%

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