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MACHINE DESIGN

Machine Design
The shock resistance of steel is increased by adding

Nickel and chromium
Nickel
Cobalt and molybdenum
Chromium

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Machine Design
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as

One end fixed and the other end hinged
One end fixed and the other end free
Both the ends fixed
Both the ends hinged

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Machine Design
At low temperatures (say 75°C) the notched bar impact value of steel

Remain same
Decreases markedly
Increases markedly
Depends on heat treatment carried out

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

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

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Machine Design
The value of stress concentration factor depends upon

None of these
Material and geometry of the part
Geometry of the part
Material of the part

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