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Machine Design

Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

5 to 10
3 to 5
0.5 to 1
1 to 2

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Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

Low
High
Medium
None of these

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Machine Design
The process extensively used for making bolts and nuts is

Extrusion
Cold heading
Hot piercing
Cold peening

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Machine Design
A spring is used to

Store energy
Apply forces
Measure forces
All of these

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Medium bearing
Short bearing
Long bearing
Square bearing

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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
τ/2
2 τ
4 τ

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