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Machine Design

Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

4
43832
1
2

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Machine Design
In static loading, stress concentration is more serious in

Brittle materials
Elastic materials
Brittle as well as ductile materials
Ductile materials

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Machine Design
The smallest diameter of an external or internal screw thread is known as

Pitch diameter
Minor diameter
None of these
Major diameter

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Machine Design
The washer is generally specified by its

Mean diameter
Outer diameter
Thickness
Hole diameter

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

2 d
5 d
3 d
4 d

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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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