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Machine Design

Machine Design
Which is positive drive?

Timing belt
Flat belt drive
V belt drive
Crossed belt drive

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

Less
More
None of these
Same

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Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

0.12638888888889
0.084027777777778
0.085416666666667
0.042361111111111

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Machine Design
The resultant axial load on a bolt depends upon

External load applied
Initial tension due to tightening of the bolt
All of these
Relative elastic yielding of the bolt and the connected members

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Machine Design
The railway carriage couplings have

Square threads
Knuckle threads
Acme threads
Buttress threads

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Torsional stiffness of each shaft is the same
Angle of twist of each shaft is the same
Shear stress in each shaft is the same
Torque in each shaft is the same

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