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Machine Design

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
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

Same
None of these
More
Less

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Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

0.5 to 1
1 to 2
5 to 10
3 to 5

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Machine Design
If a load W is applied instantaneously on a bar; Then the stress induced in bar will

Decrease with decrease in y
Depend on other considerations
Increase with increase in y
Be independent of ratio of mass of load W to mass of bar (y)

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

5 times
15 times
20 times
10 times

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

None of these
Bevel gearing
Worm gearing
Helical gearing

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