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Machine Design

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

Pan Head
Counter sunk head
Snap head
Conical head

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Machine Design
The coefficient of friction in belt drive depends upon

Material of pulley
Material of belt
Materials of belt and pulley
Belt velocity

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

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

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Crimped
Honed
Bent
Flared

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/3σt
pd/σt
pd/2σt
pd/4σt

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Shaft B is better than shaft A
None of these
Both the shafts are equally good
Shaft A is better than shaft B

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