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Machine Design

Machine Design
The shear modulus of resilience is proportional to

(Shear stress)⁴
Shear stress
(Shear stress)3
(Shear stress)²

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Machine Design
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.

Three times
Same
Four times
Double

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Machine Design
In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)

d + 17 mm
2d + 20 mm
3.5d
2d + 13 mm

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

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

0.5
0.33
0.55
0.4

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

60°
90°
45°
75°

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