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Machine Design

Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Outside diameter
Height
Inside diameter

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Machine Design
Which one of the following loading is considered for the design of axles?

Combined bending moment and twisting moments
Combined action of bending moment, twisting moment and axial thrust
Bending moment only
Twisting moment only

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Machine Design
All stresses produced in a belt are

Compressive stresses
Shear stresses
Tensile stresses
Both tensile and compressive stresses

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Machine Design
The bearing characteristic number in a hydrodynamic bearing depends upon

Length, width and speed
Viscosity, speed and load
Viscosity, speed and bearing pressure
Length, width and load

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

6 kN/m
30 kN/m
12 kN/m
24 kN/m

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Machine Design
The value of stress concentration factor depends upon

Material of the part
None of these
Geometry of the part
Material and geometry of the part

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