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Machine Design

Machine Design
In Vickers hardness testing, the pyramid indentor apex is

40°
122°
136°
152°

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Machine Design
Basic hole is one

Whose lower as well as upper deviations are zero
Does not exist
Whose lower deviation is zero
Whose upper deviation is zero

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Machine Design
When a helical compression spring is cut into halves, the stiffness of the resulting spring will be

One-half
One-fourth
Double
Same

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

Depends on other factors
Higher
Lower
Same

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Angle of twist of each shaft is the same
Torsional stiffness of each shaft is the same
Torque in each shaft is the same
Shear stress in each shaft is the same

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Machine Design
Pick up wrong statement. Fatigue strength can be increased by

Grinding and lapping surface
Shot peening
Cold working
Hot working

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