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Machine Design

Machine Design
If a material fails below its yield point, failure would be due to

Creep
Straining
Sudden loading
Fatigue

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Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

120°
180°
360°
270°

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Machine Design
A leaf spring in automobiles is used

To store strain energy
To absorb shocks
To apply forces
To measure forces

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Machine Design
The rated life of a bearing varies

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

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Machine Design
The smallest diameter of an external or internal screw thread is known as

None of these
Pitch diameter
Major diameter
Minor diameter

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

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