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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Half
Double
Same
None of these

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Machine Design
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is

10 N-m
15 N-m
7 N-m
5 N-m

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Machine Design
Whether any core is required in wire ropes

Sometimes
Yes
No
Rarely

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Remain unaffected with cross-section area
Increasing the cross-section area of bar
Decreasing the cross-section area of bar
Would depend upon other factors

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Machine Design
Rankine's theory of failure is applicable for following type of materials

Elastic
Plastic
Ductile
Brittle

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Machine Design
The yield point in static loading is __________ as compared to fatigue loading.

Lower
None of these
Same
Higher

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