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Machine Design

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

Height
Inside diameter
Outside diameter
Pitch diameter

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Machine Design
For steel, the ultimate strength in shear as compared to ultimate strength in tension is

43834
43833
43864
43832

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Machine Design
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

Repeated stress
Yield stress
Alternating stress
Fluctuating stress

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Bevel gearing
Helical gearing
Worm gearing
None of these

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Machine Design
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

Knuckle threads
Acme threads
Buttress threads
Square threads

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Machine Design
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

σ [1 + (2a/b)]
σ [1 + (b/3a)]
σ [1 + (3a/b)]
σ [1 + (b/2a)]

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