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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
4 d
3 d

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Machine Design
In radial cams, the follower moves

In a direction perpendicular to the cam axis
In any direction irrespective of cam axis
Along the cam axis
In a direction parallel to the cam axis

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° stub system
None of these
14½° composite and full depth involute system
20° full depth involute system

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Machine Design
Which of the following material has the maximum ductility?

Copper
Mild steel
Zinc
Aluminium

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Machine Design
The lead angle of a worm is 22.5°. Its helix angle will be

22.5°
45°
90°
67.5°

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(4WD/ πd3) × K
(8WD/ πd3) × K
(2WD/ πd3) × K
(WD/ πd3) × K

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