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Machine Design

Machine Design
The rivet head used for boiler plate riveting is usually

Pan Head
Conical head
Snap head
Counter sunk head

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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)

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

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Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

3-15 m/s
1-3 m/s
15-30 m/s
30-50 m/s

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

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

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Machine Design
In cylindrical cams, the follower moves

In any direction irrespective of cam axis
Along the cam axis
In a direction parallel to the cam axis
In a direction perpendicular to the cam axis

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Machine Design
A screw is said to be over hauling screw, if its efficiency is

More than 50%
None of these
Less than 50%
Equal to 50%

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