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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Nickel
Cobalt and molybdenum
Nickel and chromium
Chromium

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Machine Design
The included angle for the British standard whitworth thread is

55°
47.5°
29°
60°

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Machine Design
When a bolt is subjected to an external load, the stress induced in the bolt will be

Shear stress
Combined tensile and shear stress
Tensile stress
Any one of these

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Machine Design
A leaf spring in automobiles is used

To absorb shocks
To measure forces
To store strain energy
To apply forces

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Machine Design
Fibrous fracture occurs in

Hard material
Brittle material
Ductile material
Elastic material

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Machine Design
Gear box is used

To produce torque
For speed reduction
To increase efficiency of system
To obtain variable speeds

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