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Machine Design

Machine Design
The taper on a rectangular sunk key is

1 in 48
1 in 32
1 in 100
1 in 16

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

p.d.σt
(p - d) t.σt
p.t.σt

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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)1/2
(6V/ π)3
(6V/ π)1/3
(6V/ π)2

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Machine Design
The rated life of a bearing varies

Inversely as fourth power of load
Directly as load
Inversely as cube of load
Inversely as square of load

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Machine Design
When two non-intersecting and non-coplanar shafts are connected by gears, the arrangement is known as

Bevel gearing
Helical gearing
Spur gearing
Spiral gearing

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Machine Design
The backlash for spur gears depends upon

Tooth profile
Module
Both module and pitch line velocity
Pitch line velocity

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