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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1
π
π × number of teeth
1/π

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Machine Design
In nitrated parts, the origins of the fatigue cracks will occur at

Surface
Within the core
Just below the surface
None of these

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Machine Design
If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio

Decreases
Remains unchanged
Increases
None of these

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Machine Design
A column of length l is fixed at both ends. The equivalent length of the column is

l/2
2 l
l/√2
l

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Machine Design
Transverse fillet welded joints are designed for

Shear strength
Compressive strength
Bending strength
Tensile strength

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Machine Design
The anti-friction bearings

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

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