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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

5 d
2 d
3 d
4 d

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

Less
More
Same
None of these

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Machine Design
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

Fully
Partially
None of these
Either A or B

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Machine Design
Rivets are generally specified by

Nominal diameter
Length of rivet
Thickness of plates to be riveted
Diameter of head

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Machine Design
In a flange coupling, the bolts are subjected to

Shear stress
Tensile stress
Compressive stress
None of these

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Increasing shank diameter
Tightening it properly
Making shank diameter equal to core diameter of thread
Grinding the shank

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