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Machine Design

Machine Design
The cross-section of the arm of a bell crank lever is

Elliptical
I-section
Any one of these
Rectangular

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Machine Design
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called

Ductility
Plasticity
Malleability
Elasticity

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Machine Design
The resultant axial load on a bolt depends upon

Initial tension due to tightening of the bolt
Relative elastic yielding of the bolt and the connected members
External load applied
All of these

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Machine Design
The edges of a boiler plate are bevelled to an angle of

60°
80°
45°
30°

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Machine Design
Shaft coupling is used in machinery to

All of these
Introduce protection against over loads
Reduce the transmission of shock loads
Introduce mechanical flexibility

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Machine Design
Surface endurance limit of gear material is dependent upon its

Toughness
Elastic strength
Brinell hardness number
Yield strength

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