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Machine Design

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

p.d.σc
(p - d) t.σc
p.t.σc
n.d.t.σc

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Machine Design
The cold working of metals is carried out __________ the recrystallization temperature.

Above
None of these
At
Below

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Machine Design
Ball bearing type screws are found in following application

Crane
Aeroplane engines
Steering mechanism
Screw jack

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Machine Design
The pitch of threads on a Jock nut in comparison to pitch of nut is

Same
Finer
Very fine
Coarser

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Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.5
0.65
0.35
0.2

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ
2 τ
τ/2
4 τ

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