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Machine Design

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

Height
Outside diameter
Inside diameter
Pitch diameter

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Machine Design
In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

3.5 d
d + 17 mm
2d + 13 mm
2d + 20 mm

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

F
F.P
P
F + P

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Machine Design
Maximum principal stress theory is applicable for

Brittle materials
Ductile materials
All of these
Elastic materials

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

(6V/ π)2
(6V/ π)1/2
(6V/ π)3
(6V/ π)1/3

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Machine Design
Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

Dynamic loading
Completely reversed loading
Combined static and dynamic loading
Static loading

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