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Machine Design

Machine Design
According to Indian standards, total numbers of fundamental deviations are

15
10
25
20

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Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

21
25
17
15

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Machine Design
The ball bearings are provided with a cage

To prevent the lubricant from flowing out
To maintain the balls at a fixed distance apart
To facilitate slipping of balls
To reduce friction

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Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Medium series whose bore is 25 mm
Light series whose bore is 5 mm
Medium series whose bore is 5 mm
Light series whose bore is 25 mm

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Machine Design
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

All of these
Decreasing the modulus of elasticity of the bar
Increasing the length of bar
Decreasing the cross-sectional area of the bar

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Completely reversed load
Dynamic load
Static as well as dynamic load
Static load

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