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Machine Design

Machine Design
A screw is specified by its

Major diameter
Pitch diameter
Pitch
Minor diameter

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Varies exponentially, being more at the torque-input end
Varies linearly
Is uniform throughout
Varies exponentially, being less at the torque-input end

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

100
90
120
60

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Machine Design
A locking device extensively used in automobile industry is a

Castle nut
Sawn nut
Jam nut
Ring nut

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

None of these
Pitch lead angle
Pressure angle
Helix angle

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Machine Design
Failure of a material is called fatigue when it fails

Below the yield point
At the elastic limit
At the yield point
Below the elastic limit

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