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Machine Design

Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-fourth
One-half
Double
One-third

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Machine Design
Rankine's theory of failure is applicable for following type of materials

Ductile
Plastic
Elastic
Brittle

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Machine Design
In static loading, stress concentration is more serious in

Brittle materials
Brittle as well as ductile materials
Elastic materials
Ductile materials

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Machine Design
In skew bevel gearing, the axes of shafts are

Intersecting and the teeth are curved
Non-intersecting and nonparallel and the teeth are curved
Non-intersecting and non-parallel and the teeth are straight
None of these

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Machine Design
The stress induced in the belt is,

Tensile stress
Torsional shear stress
Compressive stress
Direct shear stress

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Machine Design
The maximum shear stress theory is used for

Ductile materials
Nonferrous materials
Plastic materials
Brittle materials

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