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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

π
π × number of teeth
1/π
1

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Tensile stress
Shear stress
Compressive stress
Bending stress

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Machine Design
The longitudinal stress is __________ of the circumferential stress.

Three-fourth
Double
Two-third
One-half

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Machine Design
The coefficient of friction in belt drive depends upon

Material of pulley
Material of belt
Belt velocity
Materials of belt and pulley

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Machine Design
Guest's theory is used for

Elastic materials
Ductile materials
Brittle materials
Plastic materials

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

70 to 83%
80 to 90%
63 to 70%
45 to 60%

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