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Machine Design

Machine Design
The crest diameter of a screw thread is same as

Core diameter
Pitch diameter
Major diameter
Minor diameter

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Machine Design
The cross-section of the arm of a bell crank lever is

Rectangular
Any one of these
Elliptical
I-section

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Machine Design
Rankine's theory is used for

Plastic materials
Ductile materials
Brittle materials
Elastic materials

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Machine Design
The product of the diametral pitch and circular pitch is equal to

π × number of teeth
1
1/π
π

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Machine Design
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the

Minimum tensile strength is 200 N/mm²
Maximum shear strength is 200 N/mm²
Carbon content is 2%
Maximum compressive strength is 200 N/mm²

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Left hand with same pitch
Right hand with same pitch
Right hand with fine pitch
Could be left or right hand

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