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Machine Design

Machine Design
The shear modulus of resilience is proportional to

(Shear stress)²
(Shear stress)⁴
Shear stress
(Shear stress)3

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Machine Design
The static tooth load should be __________ the dynamic load.

Greater than
Equal to
Less than
None of these

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

43832
1
4
2

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

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Machine Design
Which of the following welded joint is designed for shear strength?

All of these
Butt welded joint
Parallel fillet welded joint
Transverse fillet welded joint

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ
τ/2
2 τ
4 τ

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