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Machine Design

Machine Design
In a transverse fillet welded joint, the size of weld is __________ the throat of weld.

2 times
0.5 times
Double
Equal to

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Machine Design
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

Gd⁴/ 8D3n
Gd⁴/ 4D3n
Gd⁴/ 8D²n
Gd3/ 8D3n

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Machine Design
A screw will be self locking, if

Friction angle is equal to helix angle
Friction angle is more than helix angle
Efficiency of screw is 100%
Friction angle is less than helix angle

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

Higher
Same
Depends on other factors
Lower

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Normal pitch
Diametral pitch
Axial pitch
Module

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Machine Design
The washer is generally specified by its

Mean diameter
Thickness
Outer diameter
Hole diameter

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