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Machine Design

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
A cotter joint is used to connect two __________ rods.

None of these
Parallel
Co-axial
Perpendicular

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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)

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

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Machine Design
Surface endurance limit of gear material is dependent upon its

Elastic strength
Brinell hardness number
Yield strength
Toughness

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Machine Design
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have

Left hand threads
Multiple threads
Pointed threads
Right hand threads

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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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