Machine Design
In static loading, stress concentration is more serious in

Brittle materials
Brittle as well as ductile materials
Elastic materials
Ductile materials

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Obtain variable moment of inertia (I) in each leaf
Permit each leaf to act as an overhanging beam
Make M/I constant throughout the length of the leaf
Have variable bending moment (M) in each leaf

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Machine Design
According to Indian standard specifications, 100 H6/g5 means that

Tolerance grade for the shaft is 6 and for the hole is 5
Tolerance grade for the shaft is 4 to 8 and for the hole is 3 to 7
Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7
Tolerance grade for the hole is 6 and for the shaft is 5

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