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Machine Design

Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

1.2 d
0.5 d
d
0.8 d

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Machine Design
Two shafts will have equal strength, if

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

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Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

None of these
Shear strength is greater than crushing strength
Shear strength is less than crushing strength
Shear strength is equal to crushing strength

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Machine Design
The suitable material for belt in agricultural machinery is

Leather
Cotton duck
Rubber
Balata gum

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Machine Design
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

Smaller than
Equal to
None of these
Larger than

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Machine Design
In unilateral system of tolerance, the tolerance is allowed on

One side of the actual size
Both sides of the nominal size
Both sides of the actual size
One side of the nominal size

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