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Machine Design

Machine Design
The difference between the upper limit and lower limit of a dimension is called

Tolerance
Actual size
Basic size
Nominal size

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Machine Design
The fatigue life of a part can be improved by

Polishing
Shot peening
Coating
Electroplating

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Varies exponentially, being less at the torque-input end
Varies linearly
Is uniform throughout
Varies exponentially, being more at the torque-input end

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Machine Design
When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

16F/ 3πd²
8F/ πd²
6F/ πd²
4F/ πd²

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Machine Design
The building up of worn and undersized parts, subjected to repeated loads by electroplating is

Extremely hazardous
Has no effect as regards fatigue strength
Best method
Cheapest method

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Machine Design
In second type of levers,

Effort is in between the fulcrum and load
None of these
Fulcrum is in between the load and effort
Load is in between the fulcrum and effort

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