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Machine Design

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

Actual size
Nominal size
Tolerance
Basic size

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Machine Design
The algebraic difference between the maximum limit and the basic size is called

Actual deviation
Upper deviation
Mean deviation
Lower deviation

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Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

Shear strength is equal to crushing strength
Shear strength is less than crushing strength
None of these
Shear strength is greater than crushing strength

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Square bearing
Long bearing
Short bearing
Medium bearing

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.98
0.96
0.99
0.97

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

3
2.5
2.8
3.5

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