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Machine Design

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

1
π × number of teeth
1/π
π

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A combination of torsional shear stress and bending
A combination of bending stress and direct shear stress
Bending stress only
Direct shear stress only

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Machine Design
Lewis equation in gears is used to find the

Compressive stress in bending
Fatigue stress
Shear stress
Tensile stress in bending

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Machine Design
The material commonly used for machine tool bodies is

Brass
Aluminium
Cast iron
Mild steel

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Machine Design
Yield point in fatigue loading as compared to static loading is

Higher
Same
Lower
Depends on other factors

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Machine Design
The design of the pressure vessel is based on

None of these
Hoop stress
Longitudinal stress
Longitudinal and hoop stress

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