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Machine Design

Machine Design
Crushing resistance required to crush the rivet per pitch length is

p.d.σc
p.t.σc
(p - d) t.σc
n.d.t.σc

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Machine Design
The resultant axial load on a bolt depends on

External load applied
All of these
Initial tension
Relative elastic yielding (springness) of the bolt and the connected member

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Machine Design
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

Knuckle threads
Square threads
Buttress threads
Acme threads

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Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

2εc + εl
εc + εl²
εc² + εl
εc + 2εl

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Machine Design
The contact ratio for gears is

Zero
Less than one
None of these
Greater than one

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

Remain same
None of these
Increases
Decreases

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