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Machine Design

Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

None of these
Smaller
Greater
Medium

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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)

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

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Machine Design
The design of pin of a rocker arm of an I.C. engine is based on

Shearing failure
All of these
Bending failure
Bearing failure

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Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Twice
None of these
Half
Thrice

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Machine Design
The bearings of heavy series have capacity __________ over the medium series.

40 to 50%
30 to 40%
20 to 30%
10 to 20%

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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

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

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