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Machine Design

Machine Design
Yield point in fatigue loading as compared to static loading is

Higher
Lower
Same
Depends on other factors

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

Equal to
Double
2 times
0.5 times

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Machine Design
The included angle in unified of American National threads is

47°
60°
29°
55°

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Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2000 N-m
2100 N-m
2136 N-m
2050 N-m

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Left hand with same pitch
Right hand with fine pitch
Right hand with same pitch
Could be left or right hand

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Machine Design
Failure of a material is called fatigue when it fails

Below the yield point
At the elastic limit
At the yield point
Below the elastic limit

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