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Machine Design

Machine Design
In a flange coupling, the flanges are coupled together by means of

None of these
Studs
Headless taper bolts
Bolts and nuts

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Machine Design
When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be

3F/2bh
2F/bh
4F/bh
F/bh

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Machine Design
The design of shafts made of brittle materials is based on

St Venant's theory
Rankine's theory
Guest's theory
Von Mises theory

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Machine Design
Aircraft body is usually fabricated by

Welding
Pre-casting
Riveting
Casting

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

24
12
18
14

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Machine Design
Gear box is used

To obtain variable speeds
For speed reduction
To produce torque
To increase efficiency of system

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