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Machine Design

Machine Design
In leaf springs, the longest leaf is known as

Lower leaf
Upper leaf
None of these
Master leaf

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

135°
160°
90°
180°

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Machine Design
If a material fails below its yield point, failure would be due to

Creep
Fatigue
Straining
Sudden loading

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Machine Design
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.

Four times
Three times
Same
Double

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Machine Design
Which of the following pipe joints would be suitable for pipes carrying steam?

Flanged
Bell and spigot
Expansion
Threaded

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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/2σt
pd/4σt
pd/σt

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