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Machine Design

Machine Design
According to Indian standards, total numbers of tolerance grades are

8
18
12
20

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Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.35
0.2
0.5
0.65

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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

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

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Machine Design
Crushing resistance required to crush the rivet per pitch length is

p.t.σc
(p - d) t.σc
p.d.σc
n.d.t.σc

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Machine Design
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

2.5 d
2 d
1.5 d
1 d

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Machine Design
A cotter joint is used to connect two __________ rods.

Perpendicular
Co-axial
None of these
Parallel

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