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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
2.5 d
1.2 d
2 d

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Machine Design
If a load W is applied instantaneously on a bar; Then the stress induced in bar will

Depend on other considerations
Be independent of ratio of mass of load W to mass of bar (y)
Increase with increase in y
Decrease with decrease in y

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Machine Design
The design of pin of a rocker arm of an I.C. engine is based on

All of these
Bending failure
Shearing failure
Bearing failure

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Machine Design
In second type of levers,

None of these
Fulcrum is in between the load and effort
Load is in between the fulcrum and effort
Effort is in between the fulcrum and load

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Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.55
0.4
0.33
0.5

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

Increases
None of these
Decreases
Remain same

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