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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Same
Double
None of these
Half

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

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

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Machine Design
The stress induced in the belt is,

Compressive stress
Tensile stress
Torsional shear stress
Direct shear stress

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Machine Design
Which of the following is an anti-friction bearing?

Collar bearing
Needle bearing
Journal bearing
Pedestal bearing

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

Increases
Decreases
Remain same
None of these

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Machine Design
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

(1/2) × [M + √(M² + T²)]
(1/2) × √(M² + T²)
M + √(M² + T²)
√(M² + T²)

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