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Machine Design

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

Height
Inside diameter
Pitch diameter
Outside diameter

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Machine Design
18/8 steel contains

18% nickel and 8% chromium
18% vanadium and 8% nickel
18% chromium and 8% nickel
18% nickel and 8% vanadium

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Larger/smaller depending on diameter of spring coil
Smaller
Equal
Larger

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Machine Design
The power transmitted by belt drive depends upon

Initial belt tension
All of these
Arc of contact
Belt velocity

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

None of these
Pitch lead angle
Pressure angle
Helix angle

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Machine Design
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

3 × (π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
(π/4) d² × τ × n

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