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Machine Design

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

8
4
6
2

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Machine Design
For tight leakage joints, following type of thread is best suited

Buttress
Square
NPT (national pipe threads).
Metric

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Machine Design
According to Indian standard specifications, 100 H6/g5 means that the

None of these
Difference between the actual size and basic size is 100 mm
Basic size is 100 mm
Actual size is 100 mm

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Machine Design
Guest's theory is used for

Plastic materials
Ductile materials
Elastic materials
Brittle materials

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Machine Design
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

Maximum distortion energy theory
Maximum principal stress theory
Maximum strain energy theory
Maximum shear stress theory

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Static as well as dynamic load
Dynamic load
Completely reversed load
Static load

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