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Machine Design

Machine Design
The number of slots in a 25 mm castle nut is

8
2
6
4

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Machine Design
The dynamic tooth load is due to

Inaccuracies of tooth spacing
Deflections of teeth under load
All of these
Irregularities in tooth profiles

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Machine Design
The resultant axial load on a bolt depends on

External load applied
Relative elastic yielding (springness) of the bolt and the connected member
All of these
Initial tension

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Machine Design
The rated life of a bearing varies

Inversely as square of load
Directly as load
Inversely as fourth power of load
Inversely as cube of load

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Machine Design
Fabric belts are used in industrial applications because

None of these
They are cheap
They can work at high temperature
They are unaffected by moisture and humidity

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Machine Design
The notch angle of the Izod impact test specimen is

20°
45°
30°
10°

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