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Machine Design

Machine Design
The centre to centre distance between two consecutive rivets in a row, is called

Back pitch
Margin
Pitch
Diagonal pitch

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Machine Design
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

Thin film
Thick film
None of these
Either A or B

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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/2σt
pd/3σt
pd/σt
pd/4σt

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Machine Design
The V-belts are particularly suitable for __________ drives.

Short
None of these
Long
Both A and B

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Shear stress in each spring will be equal
Only A is correct
Load taken by each spring will be half the total load
Both A and B is correct

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Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Compression
Shear
All of these
Tension

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