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Machine Design

Machine Design
Rankine's theory is used for

Ductile materials
Elastic materials
Brittle materials
Plastic materials

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Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

1/tanθ
1/sinθ
sinθ cosθ
1/cosθ

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Machine Design
The contact ratio for gears is

Less than one
Greater than one
Zero
None of these

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

18
8
20
12

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Machine Design
Factor of safety for fatigue loading is the ratio of

Young's modulus to the ultimate tensile strength
Endurance limit to the working stress
Elastic limit to the yield point
Elastic limit to the working stress

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Butt joint with double cover plate
Lap joint with one ring overlapping the other
Any one of the above
Butt joint with single cover plate

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