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Machine Design

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

None of these
Low
High
Medium

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Machine Design
The temperature at which the new grains are formed in the metal is known as

Upper critical temperature
None of these
Lower critical temperature
Recrystallization temperature

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Machine Design
Multiple threads are used to secure

High mechanical advantage
High load lifting capacity
High efficiency
Low efficiency

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Machine Design
The bearings of heavy series have capacity __________ over the medium series.

40 to 50%
10 to 20%
20 to 30%
30 to 40%

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Machine Design
Residual stress in materials

Is independent of external loads
Acts when external load is applied
Is always harmful
Becomes zero when external load is removed

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

22.5 kN
15 kN
10.6 kN
7.5 kN

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