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Machine Design

Machine Design
The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.

Equal to
Less than
None of these
More than

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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

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

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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
Helical gearing
Bevel gearing
Worm gearing

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Machine Design
A self locking screw has

Course threads
Hole for inserting split pin
Fine threads
Coefficient of friction is greater than tangent of load angle

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

14½° full depth involute tooth
14½° stub tooth
20° full depth involute tooth
20° involute stub tooth

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

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

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