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Machine Design

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

0.33
0.5
0.55
0.4

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Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

3 d
2 d
4 d
5 d

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Machine Design
Two shafts will have equal strength, if

Material of both the shafts is same
Angle of twist of both the shafts is same
Diameter of both the shafts is same
Twisting moment of both the shafts is same

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Machine Design
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Jam nut
Ring nut
Castle nut
Sawn nut

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Machine Design
The following type of nut is used with alien bolt

Castle nut
Hexagonal nut
Slotted nut
Any one of the above

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Machine Design
Basic shaft is one

Whose lower as well as upper deviations are zero
Whose upper deviation is zero
Whose lower deviation is zero
Does not exist

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