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Machine Design

Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

1.2 d
0.8 d
0.5 d
d

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

Same
None of these
More
Less

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Machine Design
Oldham coupling is used to connect two shafts

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

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Machine Design
The centre distance between two meshing involute gears is equal to

Sum of pitch circle radii/cosφ
Sum of base circle radii/cosφ
Difference of base circle radii/cosφ
Difference of pitch circle radii/cosφ

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

Inside diameter
Height
Outside diameter
Pitch diameter

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + sinφ)/ (1 - sinφ)
(1 + cosφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + sinφ)
(1 - sinφ)/ (1 + cosφ)

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