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Machine Design

Machine Design
Which of the following property is essential for spring materials?

Stiffness
Plasticity
Ductility
Resilience

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Machine Design
The draw of cotter need not exceed

20 mm
10 mm
5 mm
3 mm

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the top of a tooth
Top of a tooth to the bottom of a tooth
Pitch circle to the bottom of a tooth
Addendum circle to the clearance circle

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Machine Design
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

White colour
Brown colour
Yellow colour
Grey colour

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

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Machine Design
Antifriction bearings are

None of these
Sleeve bearings
Thin lubricated bearings
Hydrodynamic bearings

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