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Machine Design

Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

3-15 m/s
15-30 m/s
30-50 m/s
1-3 m/s

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

None of these
Longitudinal stress
Circumferential stress
Shear stress

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Machine Design
When a metal or alloy is cold worked,

It is worked below recrystallization temperature
None of these
Its hardness and strength increases
Both (A) and (B)

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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
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M6 - 8d
M6
M8
M8 - 6d

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Machine Design
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as

Both the ends hinged
One end fixed and the other end hinged
One end fixed and the other end free
Both the ends fixed

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