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Machine Design

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

π
π × number of teeth
1
1/π

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

120°
270°
360°
180°

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Machine Design
A feather key is generally

Tight in shaft and loose in hub
Loose in shaft and tight in hub
Tight in both shaft and hub
Loose in both shaft and hub

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Machine Design
The draw of cotter need not exceed

3 mm
5 mm
20 mm
10 mm

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Machine Design
A saddle key __________ power through frictional resistance only.

Does not transmit
Either A or B
Transmits
None of these

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

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

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