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Machine Design

Machine Design
In the levers of first type, the mechanical advantage is ________ one.

Less than
Equal to
None of these
More than

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Machine Design
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

Three times
Twice
Equal to
Four times

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Machine Design
A key way lowers

The rigidity of the shaft
The strength of the shaft
Both the strength and rigidity of the shaft
The ductility of the shaft

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

Longitudinal stress
None of these
Circumferential stress
Shear stress

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

Same time to reach earth
Times proportional to weight to reach earth
None of these
Times inversely proportional to weight to reach earth

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Machine Design
Maximum principal stress theory is applicable for

Brittle materials
Elastic materials
All of these
Ductile materials

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