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Machine Design

Machine Design
The rivet head used for boiler plate riveting is usually

Pan Head
Conical head
Snap head
Counter sunk head

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Machine Design
The buckling load will be maximum for a column, if

One end of the column is clamped and the other end is free
Both ends of the column are clamped
Both ends of the column are hinged
One end of the column is hinged and the other end is free

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Machine Design
The permissible stress for carbon steel under static loading is generally taken as

4000-4500 kg/cm²
7500-10,000 kg/cm²
3000-4000 kg/cm²
2000-3000 kg/m²

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Machine Design
A tube has the following advantage over pipe

Lighter and easier to handle
Greater shock absorption
All of these
Smoother inside walls

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.4 times
0.8 times
0.6 times
0.7 times

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Machine Design
Screws used for power transmission should have

High efficiency
Low efficiency
Very fine threads
Strong teeth

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