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In a close – coiled helical spring the maximum shea stress occurs on the

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The stiffness of the second spring will be

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A closed – coil helical spring is subjected to a moment about its axis. The spring wire would experience a

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If each spring had ‘n’ coils then the ratio of their spring constants would be

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Wahl stress factor takes into account

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Stiffness of the resultant spring will be

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The stress induced in the wire material of the spring is

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The stiffness of the close – coiled helical spring subject to an axial load W is equal to

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The maximum shear stress in the spring the new condition will be

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In the calculation of induced shear stress in helical springs the Wahl’s correction factor is used to take care of

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In the calculation of induced shear stress in the helical springs the wahl correction factor is used to take of

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Cracks in helical springs used in Railway carriages usually start on the inner side of the coil because of

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The spring stiffness will be

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The modulus of elasticity of the wire be

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When two springs of equal lengths are arranged to form a cluster spring then which of the following

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The efficiency of the power screw neglecting collar friction is given by

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The efficiency of a power screw is maximum when the lead (helix) angle is

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The core diameter of the screw is 40 mm. The shear stress due to this torque in the power screw is

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Which of the following screw threads is adopted for power transmission in either direction?

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Multistate threads are used to get

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