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Machine Design

Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Crimped
Honed
Bent
Flared

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Smaller
Equal
Larger/smaller depending on diameter of spring coil
Larger

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Machine Design
According to I.B.R., the factor of safety of riveted joint should not be less than

4
3
1
2

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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

7.5 kN
10.6 kN
22.5 kN
15 kN

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Machine Design
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

Maximum shear stress theory
Maximum principal stress theory
Maximum strain energy theory
Maximum distortion energy theory

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Machine Design
In a butt welded joint, the size of weld is __________ the throat of weld.

Equal to
0.5 times
Double
2 times

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