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Machine Design

Machine Design
The draw of cotter need not exceed

3 mm
5 mm
10 mm
20 mm

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Machine Design
For applications involving high stresses in one direction only the following type of thread would be best suited

Square thread
ISO metric thread
Buttress thread
Acme thread

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Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Process annealing
Full annealing
Normalising
Spheroidising

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

P1 + P2
[⅟₂ × (P1 + P2)] + Pc
⅟₂× (P1 + P2)
[(√P1 + √P2)/2]²

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Machine Design
Rankine's theory is used for

Elastic materials
Plastic materials
Ductile materials
Brittle materials

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Machine Design
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

M + √(M² + T²)
(1/2) × [M + √(M² + T²)]
(1/2) × √(M² + T²)
√(M² + T²)

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