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Machine Design

Machine Design
According to Indian standards, total numbers of tolerance grades are

20
12
18
8

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Machine Design
In levers, leverage is the ratio of

Effort arm to the load arm
Load arm to the effort arm
Load lifted to the effort applied
Mechanical advantage to the velocity ratio

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Machine Design
The resultant axial load on a bolt depends upon

Initial tension due to tightening of the bolt
All of these
External load applied
Relative elastic yielding of the bolt and the connected members

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Machine Design
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Between 20d and 30d
Less than 20d
Greater than 30d
Equal to inside diameter of pipe

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

None of these
Rockwell
Brinell
Vickers

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

None of these
Circumferential stress
Shear stress
Longitudinal stress

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