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Machine Design

Machine Design
Rankine's theory is used for

Brittle materials
Elastic materials
Plastic materials
Ductile 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 strain energy theory
Maximum distortion energy theory
Maximum shear stress theory
Maximum principal stress theory

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Machine Design
A type of brake commonly used in motor cars is a

Internal expanding brake
Band and block brake
Shoe brake
Band brake

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Only A is correct
Shear stress in each spring will be equal
Both A and B is correct
Load taken by each spring will be half the total load

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Shear stress in each shaft is the same
Torque in each shaft is the same
Torsional stiffness of each shaft is the same
Angle of twist of each shaft is the same

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the top of a tooth
Pitch circle to the bottom of a tooth
Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle

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