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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

Pt /P
Pc /P
Ps /P
Least of Pt, Ps and Pc/P

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is 50% of yield point
Is just sufficient to hold parts together
Is about yield point divided by safety factor
Approaches yield point

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Machine Design
In levers, leverage is the ratio of

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

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

Longitudinal stress
Shear stress
Circumferential stress
None of these

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.58
1.26
1.06
1.12

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Machine Design
The function of a washer is to

Provide bearing area
Absorb shocks and vibrations
Provide smooth surface in place of rough surface
Provide cushioning effect

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