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Machine Design

Machine Design
A rivet is specified by

Length of tail
Shank diameter
Length of rivet
Type of head

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Machine Design
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)

T₁/T₂ = μθ
T₁/T₂ = log μθ
T₁/T₂ =eμθ
log (T₁/T₂) = μθ

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Machine Design
The resistance to fatigue of a material is measured by

Young's modulus
Ultimate tensile strength
Elastic limit
Endurance limit

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Machine Design
The anti-friction bearings

Have high initial cost
All of these
Can carry both radial and thrust loads
Have low starting and low running friction at moderate speeds

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Machine Design
The maximum shear stress theory is used for

Plastic materials
Nonferrous materials
Ductile materials
Brittle materials

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Machine Design
The velocity of sliding __________ the distance of the point of contact from the pitch point.

Is inversely proportional to
Is directly proportional to
Is equal to cos φ multiplied by
Does not depend upon

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