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Machine Design

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

0.65
0.2
0.35
0.5

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Machine Design
A spring is used to

Measure forces
Store energy
Apply forces
All of these

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Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

1.2 d
0.5 d
0.8 d
d

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force)

1 Pc
2 Pc
3 Pc
Pc/3

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

Coarser
Finer
Same
Very fine

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Machine Design
The longitudinal joint in boilers is used to get the required

Length and diameter of boiler
Length of boiler
Diameter of boiler
Efficiency of boiler

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