A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

4 τ

2 τ

τ

τ/2

4 τ

2 τ

τ

τ/2

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Machine Design
When a belt drive is transmitting maximum power,

Effective tension is half of centrifugal tension

Effective tension is equal to centrifugal tension

Driving tension on tight side is twice the centrifugal tension

Driving tension on slack side is equal to centrifugal tension

Effective tension is half of centrifugal tension

Effective tension is equal to centrifugal tension

Driving tension on tight side is twice the centrifugal tension

Driving tension on slack side is equal to centrifugal tension

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Machine Design
A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

Malleability

Ductility

Plasticity

Elasticity

Malleability

Ductility

Plasticity

Elasticity

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Machine Design
A riveted joint is a __________ fastening.

Temporary

Either A or B

None of these

Permanent

Temporary

Either A or B

None of these

Permanent

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

Double

One-fourth

Same

One-half

Double

One-fourth

Same

One-half

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Machine Design
The stretching in a belt can be controlled by __________ the stress in the belt.

None of these

Increasing

Reducing

Both A and B

None of these

Increasing

Reducing

Both A and B

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Machine Design

Machine Design When a belt drive is transmitting maximum power,

Machine Design A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

Machine Design A riveted joint is a __________ fastening.

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

Machine Design The stretching in a belt can be controlled by __________ the stress in the belt.

Machine Design
When a belt drive is transmitting maximum power,

Machine Design
A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

Machine Design
A riveted joint is a __________ fastening.

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

Machine Design
The stretching in a belt can be controlled by __________ the stress in the belt.