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Machine Design

Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

None of these
Half
Twice
Thrice

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Machine Design
The number of slots in a 25 mm castle nut is

2
6
8
4

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Machine Design
Oldham coupling is used to connect two shafts

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

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

60
120
90
100

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Machine Design
In second type of levers,

Fulcrum is in between the load and effort
None of these
Load is in between the fulcrum and effort
Effort is in between the fulcrum and load

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

Bending stress only
A combination of torsional shear stress and bending
Direct shear stress only
A combination of bending stress and direct shear stress

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