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Machine Design

Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

1.6 d
2 d
2.5 d
1.2 d

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Machine Design
The yield point in static loading is __________ as compared to fatigue loading.

Higher
Same
Lower
None of these

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

0.042361111111111
0.084027777777778
0.12638888888889
0.085416666666667

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

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

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Machine Design
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

Thick film
None of these
Thin film
Either A or B

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Machine Design
The helix angle for double helical gears may be made up to

45°
60°
90°
75°

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